Vaemi Introduces VoltRatio Precision Voltage Adder - Subtractor Eurorack Module

video upload by Vaemi

"VoltRatio : Basic Features : Precision Voltage Adder - Subtractor : Vaemi (Eurorack)"

"The VoltRatio 1V/OCT CV input allows you to quickly and easily switch through exactly 6 harmonic degrees. Additionally, this module enables you to obtain both a copy of the fundamental frequency's voltage and a frequency one octave below simultaneously, allowing you to comfortably control up to 3 oscillators at once. Furthermore, designed as a precision multiple, this module offers precise and professional calibration options, helping your system stay in accurate tuning and advancing both you and your system.

The frequency ratio system, which can also be found in the first digital examples of Thru Zero Frequency Modulation and allows easy adjustment of harmonic degrees in all operator oscillators according to the fundamental frequency, is crucial for maintaining musical and tonal compatibility. This system greatly simplifies programming in complex FM patches. With the three separate outputs designed as Vaemi, which replicate the 1V/OCT CV input like a precision multiple and provide different degrees, you can use all analog thru zero or standard voltage-controlled oscillators. Quickly navigating between harmonic degrees during recording or live performances will provide significant musical and practical advantages. The output providing harmonic degrees (Ratios) includes 2 buffered outputs, making a total of 4 CV outputs on the module.

You can adjust the desired voltage and harmonic degrees between 0-6V according to your preferences and needs using the trimpots on the back of the module. Additionally, you can set the -1 OCT output to the desired negative level using the trimpots on the back.

All inputs and outputs of the module are DC coupled. Essentially, the module adds or subtracts an offset voltage to the voltage entered into the 1V/OCT CV input. We can think of it as a precision CV adder-subtractor. The sum of the entered and added voltages is what comes out of the outputs. In short, you can also use this module to shift the offset, process signals like envelopes or LFOs, and more. (Note about the module: one of the most important points is that it has both positive and negative outputs and precise calibrations for offset and CV scale. So, it’s not just about adding offset voltage to the voltage.)

You can read which channel you are on from the top of the module or easily determine it with the help of LEDs. The module is 10HP wide."

VoltRatio : VoltRatio & OSI-OP Jam : Precision Voltage Adder - Subtractor : Vaemi (Eurorack)

Vaemi Introduces a Eurorack Keychain Module

via Vaemi

"Release Date: August 20, 2024 (when the product willbe av ailable for purchase)

Vaemi’s Innovative Keychain for Synthesizer Enthusiasts: Keychain Holder

Vaemi is launching the Keychain Holder, an innovative product specially designed for synthesizer enthusiasts. With its eye-catching OSI-OP design, this keychain stands out for both its elegance and functionality.

Keychain Holder Features:
Powered by Adapter: The Keychain Holder is powered by an adapter to be ready for use.

Wall-Mountable Design: It can be easily mounted on a wall with the attached apparatus at the top.

Illuminated Design: The Vaemi logo in the center stays lit continuously, while the Vaemi text above the jack inputs lights up individually as each jack is inserted.

Adjustable Light Level: The overall brightness of the lights can be easily adjusted using the knob.

On/Off Switch: The product includes an on/off switch

Package Contents:
1 Keychain Holder
5 Jack Keychains

Users can attach these jack keychains to their everyday keys and easily place them on the Keychain Holder when they arrive home or at the office.

Vaemi's new product will not only meet the needs of synthesizer enthusiasts but also add an aesthetic touch. With the Keychain Holder, you can keep your keys organized while enjoying its eye-catching illuminated design."

Vaemi DIY Workshop 6 Ağustos 2024

video upload by Vaemi

Google translation from Turkish follows. Original Turkish below that.

"We will assemble all the parts from scratch and make an electronic instrument, namely a synthesizer.

We will provide all the necessary equipment as VAEMI.

Technical information on the subject will also be shared.
Contact us to join the workshop.

For information and applications: vaemisynth@gmail.com

DIY Analog Drone Synthesizer Workshop

Drone Synthesizer Technical Specifications:
• 4 Voice Polyphony
• 4 Analog Oscillators
• Touch Areas and Gate Keys
• 4 Analog Envelope (Sustain, Release)
• 4 Analog VCA
• 4 Channel Mixer
• 1 Analog RC Filter
• FM Modulation
• Can work with adapter or 9V battery
• Mono Output (1/8mm jack output)

We are organizing a repeat of our workshop on electronic circuit, synthesizer and musical instrument production and design by Efe Çakır.

A class will be created for the workshop. Participation is limited. The workshop will focus on the construction of a 4-oscillator analog drone synthesizer. The class will start at 11:00 on Sunday, August 18th and will last for 5-6 hours.

All PCB and electronic components of the synthesizer you see in the picture will be provided to you completely within the workshop fee. It is sufficient to come to the class without bringing anything with you. We will also provide the necessary materials such as soldering pen, solder, paste, speaker, battery. If you have soldered a few times before, these classes may be just for you. At the end of the class, the synthesizers you have assembled will be yours. At the beginning of the class, all electronic components will be delivered to you and a set of schematics and notes about our synthesizer will be distributed. After introductory topics such as “What is electricity?”, “Basic information about electronic materials used”, “Reading schematics”, we will proceed step by step by understanding how each section works in order of “What is an oscillator?”, “What is a VCA?” on the synthesizer. At the end of the lesson, we will all be playing our synthesizers together.

For your questions and applications, you can contact us via Efe Çakır (@ertanefecakir) and Vaemi (@vaemisynth) accounts.

In order to apply, you must make a payment before the workshop date. If you want to cancel within the last week before the workshop, no refund will be made."

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XFMR Euro DI : Audio Demo : Vaemi (Eurorack)

video upload by Vaemi

"As VAEMI, we designed the Euro DI in the Eurorack module format, which can be used for all digital or analog equipment, synthesizers, and drum machines ranging from line level devices to high voltage synthesizer levels. In this way, you can input the unbalanced sound signals of your equipment into your microphone preamp with a balanced XLR connector.

Key features include:

- Balanced XLR Output
- Neutrik XLR connectors
- Enables the transmission of audio signals over long distances
- Clean and transparent sound
- 0 degree phase shift
- Accurate isolation from electrical noise in the audio signal
- -12dB Pad switch
- 180 degree phase switch
- GND Lift switch"

OSI-OP, Ratio Switch and XFMR VCA - Analog Oscilloscope Screen - Complex Waveforms (Eurorack)

video upload by Vaemi

"OSI-OP, Ratio Switch and XFMR VCA - Analog Oscilloscope Screen - Complex Waveforms (Eurorack)"

https://reverb.com/shop/vaemisynth

Future House (EDM) Patch 1 with OSI-OP & XFMR VCA : Vaemi (Eurorack)

video upload by Vaemi

"Future House (EDM) Patch 1 with OSI-OP & XFMR VCA : Vaemi (Eurorack)"

XFMR Ring Modulator : With Sine Waves & Other Waveforms : Vaemi (Eurorack)

video upload by Vaemi

"The XFMR Ring Modulator is a very old transformer ring modulator design. It dates back to 1947. The inventor of the device is Harald Bode, not the inventor of the ring modulator, but the inventor of many other important circuits, who first thought of using it in music systems and designed an example of it. The first versions had inputs with 2 audio transformers and 4 diodes installed in a ring configuration for the ring modulator.
The module is 10 hp. It is hand-assembled with very high-quality through-hole components. The transformers used in the XFMR Ring Modulator are Tamura brand transformers with very high quality and flat response. There are two separate transformers at the input and output. Also, the input and output voltages are calibrated according to our system and eurorack systems.
Input and output have a headroom of 10Vpp. Unlike the original design, the module is not passive but active (buffered). The XFMR Ring Modulator has a Carrier input and input attenuator, an Output and its attenuator, a Modulator CV input and its attenuator. The lights on the panel show the exact phase of the modulation. The gain setting you choose on the input signals will change and affect the sound of the XFMR Ring Modulator. It will also affect and change the harmonics generated by the attenuator to reduce the amount of modulation. There is also an offset knob for ring modulation. Here you can change the zero point of the modulation, direct and shape the modulation.
At Vaemi, we have revived this old construction technique by creating the XFMR Ring Modulator as an active ring modulator with a transformer.

- Tamura Input and Output Transformers

- Active Ring Modulator design

- Illuminated design to track the phase of modulation"

Also see Vaemi Introduces XFMR Ring Modulator Eurorack Module

Vaemi Introduces XFMR Ring Modulator Eurorack Module

video uploads by Vaemi

"Vaemi's new module XFMR Ring Modulator, designed for Eurorack systems, has introduced an active ring modulator design with transformer.

Vaemi (Volt Age Electronic Musical Instruments), which manufactures synthesizers and electronic musical instruments commercially in Turkey, released its first module Osi-Op (through zero fm VCO) in the past months and immediately afterwards they shared Eurorack modules such as Shift Register, R2r Ladder, Buffered Multiple. Now, after the XFMR VCA, Vaemi, which continues the second of its transformer module designs, comes up with the XFMR Ring Modulator, that is, an active ring modulator design with transformer.

The original scheme and the history of this design date back to Harold Bode. It was designed passively at that time. XFMR Ring Modulator is a more advantageous active ring modulator module. A very large area on the panel of the module is illuminated with blue LEDs and shows the phase and height of the output signal. The input of the module is AC coupled because it is a transformer. There are also 4 knobs for controlling the module. With these knobs, you can determine the input and output levels, the number of CVs and shift the offset of the CV signal. The XFMR Ring Modulator has a very rich sound, very soft and open at high frequencies. The module has 10Vpp input and output. Tamura brand quality audio transformers are used. Vaemi today's electronic music and popular synthesis techniques can be applied to additive, FM, Formant, Subtractive, such as synthesis equipped with a system that can be used comfortably in today's music and a modern range of systems that they aim to bring together with their users will continue to be shaped and developed with new module designs that will come this year. You can browse Vaemi's products and get more detailed information by visiting www.vaemi.net You can also follow Vaemi on their social media accounts and take a look at the promotional videos, features and sounds of their new modules.

Tamura Input and Output Transformers
Active Ring Modulator Design
Illuminated Design to Track the Phase of Modulation

XFMR Ring Modulator User Manual EN

XFMR Ring Modulator User Manual TR

New Vaemi XFMR VCA

video uploads by Vaemi

"Vaemi's new module XFMR VCA, which is designed for Eurorack systems, introduces users to a transformer-based VCA design.

Turkey-based Vaemi (Volt Age Electronic Musical Instruments), which commercially produces synthesizers and electronic musical instruments, recently released its first module, the Osi-Op (through zero fm VCO), and quickly followed with other Eurorack modules such as Shift Register, R2R Ladder, Buffered Multiple, making a name for itself. Now, it has introduced and brought its users the new XFMR VCA module, which is handcrafted with high-quality, through-hole components and features an audio transformer in its output.
The XFMR VCA is a VCA with linear curves. It has two separate audio outputs, such as the classic Op-Amp and the Transformer Output feature that gives it its name. It is AC Coupled and designed specifically for audio signals, making it a VCA module that you would want to use at the end of your chain. You can use it to add saturation, harmonics, and EQ to your patches made with the Osi-Op and through zero fm techniques, or use it for a clean range if desired. This wide range of options will be loved and make you feel comfortable.
Additionally, the XFMR VCA has an expander that allows you to expand it up to 3 channels. With the expander, you can have two more exponential VCA channels, which you can use for frequency modulation of oscillators or in other places you need them.
In studios, preamplifiers are equipment that can properly raise the microphone or line signals level without distorting or adding noise to the sound. However, when recording analog synthesizers, we tend to lower the sound instead of raising it because they have very high outputs. At this point, we thought that one of the most important things that preamplifiers add to recordings, other than gain, is audio transformers.
The XFMR VCA also has an EQ stage. This will provide great flexibility when finalizing your last patch, especially in multi-channel patches, and will provide a more accurate and clean sound in live performances.
Vaemi aims to create systems that can comfortably be used in today's electronic music and popular synthesis techniques such as additive, FM, Formant, Subtractive synthesis, and will continue to shape and evolve with new module designs that will be released in the coming year.
You can visit the website www.vaemi.net to check out Vaemi's products and get more detailed information. Additionally, you can follow Vaemi on social media and take a look at promotional videos, features, and sounds of new modules.

Transformer and Op-Amp Output Stages
Linear VCA
2 Audio Inputs
2 CV Inputs
Saturation and Distortion
3 Different Distortion Types
3 Band EQ
Amplitude Modulation (AM)
AC Coupled
2 Channel Exponential VCA Expander (coming soon)"

Shift Register & R2R Ladder as a Sequencer (without sequencer) : (Eurorack)

video upload by Vaemi

"Shift Register essentially stores the data in binary form, and it shifting the data in accordance with a clock signal reference.

In fact, thanks to this feature, it is used for storing, adding, subtracting, multiplying, and dividing data in a computer.

Multiplication and dividing are actually the results of the shifting process.

Shift Register is a module that is designed for Eurorack systems, and it can run between 0V-+5V. It runs with a clock signal. This way, all the data entered through data input is synchronized with the starting and ending times of the clock signal.

This module is a dual and 4bit Shift Register module. It can be accepted as a 4-step sequencer. The jack on the module that types data is input.Even if you enter a CV signal or gate signal, the signal you will get from the outputs is a 5V gate signal.

The first output, on the other hand, gives out exactly the same pattern you entered in the data signal, only a better-synced version with the clock,while synchronizing with the clock signal, it shifting the written patten to another output as the clock arrives.

In fact, as a result, when you enter 16-note clock signals, you get a 16-note delayed version of the patten you typed from each output.

If you use this module in the audio rate range, you can run it like an oscillator with clock signals that are hearable for human ears.

In this way, while patching with square waves in Logic, you primarily get different phase degrees of the data (square wave) you entered.

The module also has a reset input. If you send a trigger or a gate to this input, Shift Register will delete all the data in its memory.

When you record data in the data input in the momentary flow and stop the clock signal, you will see that 4 steps, which is actually 4 bits of data stay frozen inside the module.

At this point, if you redirect one of the outputs to the Shift Register's data input, and if you give the clock signal back again, the pattern will enter a 2-3-4 step loop according to the output that you use. This pattern will go on like this forever if you follow these steps.The pattern you recorded is probably out of phase in comparison to the clock signal; however, you can also select the phase of the pattern by starting the Shift Register at different times.

Another method is that you can enter the same clock signals in the second Shift Register because it is a 2-channeled Shift Register module.

If you direct the 4th output of the 1st Shift Register to the data input of the 2nd Shift Register, you can extend the Shift Register up to 7 bits."

Osi-Op : Drum Synthesis with Monophonic Synth Voice : Vaemi (Eurorack)

video upload by Vaemi

"Hello
Today, with Osi-Op, we will create basically 3 separate channels (kick-snare and hihat) with this synth voice, with a monophonic synthsizer that can only play one sound at a time, that is, only one note.
We're going to think about it this way.
As if each step in the sequencer is a separate drum channel…
or each step is like a separate patch...
If I explain in more detail
First step - it will be kick.
The second third and fourth steps sound like hihat. higher pitched and more glitch sounds… step five - snare.
Again the sixth, seventh and eighth steps will be like hihat
In this way, we will write 3 channels at the same time with a monophonic synthesizer, where we normally play mono sound and make a mono patch.
When modulations come into play, more than 3 channels can be heard, but basically it is useful to think in this way.
When all the sounds are recorded on the computer, we will have only one mono channel.
It is possible to record these sounds by separating them.
At this point, your choice depends on what you want to do.
Either way will sound professional.
While installing this patch, I used 3 osc + 1 noise +3 lfo + 2 vca + 2 lpg + 4 env + 4 cv sequencer + 4 gate sequencer + 1 dual switcher + 1 granular.
Only I processed the master channel of all drums with a granular and added it on this patch in parallel.
Let's listen to the patch together now."

Osi-Op : Making a Kick Drum (Drum Synthesis) : Vaemi (Eurorack)

video upload by Vaemi

"Hello
Today we will make kick with Osi-Op and talk about drum synthesis.
First, let's set up our audio signal chain.
Now we connect the output of our Main VCA to our speakers.
We plug the Sine Wave Output of Oscillator 1 to channel 1 of VCA.
Gozinta is a preamp module. We will use this module for clipping later in the video.
We connect the trigger from the sequencer to the Trig Input of the Function Generator.
With the help of Stack Cable, we will route this trigger signal to Trig Inputs of other function generators.
That is, Trig In 1 will directed to Trig In 2, Trig In 2 to Trig In 3 and Trig In 3 to Trig In 4.
For clipping, let this cable stay here for now.
The first Envelope will control the amp.
the second Envelope will be connected to the LPG module which will control the FM signal.
LPG Output will be connected to the TZ FM Input of the 1st oscillator.
Now let's connect your 2nd oscillator, which will make FM, to LPG.
One of the most important connections that will now create the kick and drum synthesis is that the Envelope controls the frequency of the Oscillator.
For this, I multiply the output of 3 Function Generators with a multiple and direct them to 2 oscillators.
I usually prefer to use 2 Envelopes to control the frequency of the oscillator.
Let's use this envelope by duplicating it over buffered multiple.
the fourth envelope will set it shorter to get a sharper, brighter, punchy attack sound.
I connected the third envelope to the Exp.FM input and the fourth envelope to the 1v/oct input.
After all, they are doing the same thing on both entries. At this point, some minor changes can be made.
Now we can start to hear the patch we made.
After all, you can kick with a single envelope generator, but using too many envelopes this way will give you a lot of flexibility and freedom in making sounds.
Since the Thru Zero Fm technique does not distort the frequency of the oscillator, it will allow you to shape your kick's first attack sound on a much wider scale.
Now let's activate clipping.
In this way, you can get sounds with richer harmonics, harder, brighter, and the low end is more stable. In this way, you have a chance to get much more aggressive sounds."

Vaemi Shift Register

video uploads by Vaemi

via Vaemi

"Shift Register essentially stores the data in binary form, and it shifting the data in accordance with a clock signal reference. In fact, thanks to this feature, it is used for storing, adding, subtracting, multiplying, and dividing data in a computer. Multiplication and dividing are actually the results of the shifting process.

Shift Register is a module that is designed for Eurorack systems, and it can run between 0V-+5V. It runs with a clock signal. This way, all the data entered through data input is synchronized with the starting and ending times of the clock signal. This module is a dual and 4bit Shift Register module. It can be accepted as a 4-step sequencer. The jack on the module that types data is input.Even if you enter a CV signal or gate signal, the signal you will get from the outputs is a 5V gate signal. The first output, on the other hand, gives out exactly the same pattern you entered in the data signal, only a better-synced version with the clock,while synchronizing with the clock signal, it shifting the written patten to another output as the clock arrives. In fact, as a result, when you enter 16-note clock signals, you get a 16-note delayed version of the patten you typed from each output. If you use this module in the audio rate range, you can run it like an oscillator with clock signals that are hearable for human ears. In this way, while patching with square waves in Logic, you primarily get different phase degrees of the data (square wave) you entered.

The module also has a reset input. If you send a trigger or a gate to this input, Shift Register will delete all the data in its memory.

When you record data in the data input in the momentary flow and stop the clock signal, you will see that 4 steps, which is actually 4 bits of data stay frozen inside the module. At this point, if you redirect one of the outputs to the Shift Register's data input, and if you give the clock signal back again, the pattern will enter a 2-3-4 step loop according to the output that you use. This pattern will go on like this forever if you follow these steps.The pattern you recorded is probably out of phase in comparison to the clock signal; however, you can also select the phase of the pattern by starting the Shift Register at different times.

Another method is that you can enter the same clock signals in the second Shift Register because it is a 2-channeled Shift Register module. If you direct the 4th output of the 1st Shift Register to the data input of the 2nd Shift Register, you can extend the Shift Register up to 7 bits."

Osi-Op : Stereo Patches : Vaemi (Eurorack)

video upload by Vaemi

"Hello everyone Today we will be making stereo patches with Osi-Op. There are actually many ways to do this. We will now look at ways we can do it with just oscillators.
First of all, the 1st oscillator will be staying in the middle and playing the lowest frequency sound. The 2nd oscillator is panned to the left channel and the 3rd oscillator to the right channel. If we specify the amount of pan, we can say that 75% left and right panned. Apart from the random differences of the oscillators, we can say that changing the Waveshape Output with PWM settings and sometimes giving the opposite movement as a mirror of a movement to two opposite channels creates a very nice stereo image. While doing all these with basic waveforms, I also tried to create small differences between the right and left channels from time to time with Thru Zero FM. Now let's hear the results together.

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Vaemi R2R Ladder

video uploads by Vaemi



Playlist: [don't miss the last video for a musical example]

R2R Ladder : Basic Features : Vaemi (Eurorack)

Now we will use the module as 8 in 1 out. Using the output of an oscillator we can hear exactly how the module works. The sound level is getting lower and lower. Now we will use the module as 1 in - 8 out. Again, when we go down from the outputs, we hear the sound lower.In fact, the module is like an attenuator or a mixer.It can also be considered as a passive multiple. Now let's use it like a mixer and summing the outputs of two separate oscillators.

R2R Ladder : CV Modulation with R2R Ladder : Vaemi (Eurorack)

In this video we will use the R2R Ladder module to create a CV modulation. To hear what we're doing, I first connect the 2nd oscillator's Sine wave output to an LPG. We get the sound from LPG. We use the 1st oscillator to make FM. After passing the 1st oscillator through a VCA, we direct it to the FM input of the 2nd oscillator. I make Maths the Master clock and activate the clock divider right next to it. Standard 5V gate signals are output from each output of the clock divider. I am summing these signals with the help of the R2r Ladder module and determining their levels. R2R Ladder is currently used as 8 in - 1 out. The output of R2R controls the VCA we use for FM. Now, we cancel the signal we sent to vca on the R2R ladder and direct this signal to LPG.

R2R Ladder : Waveshaper Patch : Vaemi (Eurorack)

In this video, you can think that we are using the R2R Ladder module like a waveshaper or like a mixer. We connect the 1v/oct output of the sequencer to the first oscillator. We connected it to the Trig input of Maths at the gate outputs of the Sequencer. We will get the Square Wave output of the first oscillator, but we will not listen to it. With this frequency, we will operate the clock divider at a frequency of audio rate and we will begin to hear the dividers of the frequencies of the oscillator, that is, the harmonic degrees. Output number 1 in clock divider is exactly the same as the frequency of the oscillator.Now we can combine different different harmonics with R2R module. In this way, you will get more complex square waveforms.

R2R Ladder : 8 bit Arcade Style Squencer Patch : Vaemi (Eurorack)

In this video, we will make an 8bit arcade style sequencer patch. R2R Ladder is able to do this job without disturbing the tune. While making the patch, be very careful not to disturb the calibration. There are 2 separate sounds in this patch. One of the voices is synthbass and the other is a lead synth. We will do the modulation to the Lead synth. The lead synth with the 2.oscillator is played the 1v/oct input with a sequencer. On the Exponential FM input, we will add a CV modulation consisting of square waves obtained with the help of a clock divider and R2R Ladder. We hear the results together.

"R2R Ladder is a piece of unique ancillary equipment. It is inspired by DAC, and it is one of the most important and essential parts of it. Designed by Vaemi, this R2R Ladder module is an 8-bit converter. Through the inputs and outputs, whether it is audio or cv, you can enter all types of AC and DC signals. You can think of each channel as 1 bit. Each 1-bit data you send to the inputs will increase incrementally. For instance, a square waveform can be regarded as a binary system. Every channel has 2 resistances, series and parallel; and through these, you can establish a resistance ladder circuit. This circuit gives you the opportunity to get 128 parameters in the binary system, from 0 to 127.

You can use the module as 8 in – 1 out or 1 in – 8 out. Therefore, it can be used for a few different tasks. If you enter any signal from the input, from the other 8 output, it will come out as a low signal like an attenuator. The rate of lower signals will change in every input. If you enter 8 inputs, it will serve as a summing mixer. For example, if you combine more than 2 cv signals, you will have a new cv signal. If you enter more than 2 waveforms and use it in an audio rate frequency range, it will act like a waveshaper. The basic principle of a converter is that it works with 1s and 0s. To do this, it uses gate signals. The voltage of the gate signals is stable. When there is no signal, it is 0 volts; and when there is a signal, it is 8 volts. This circuit can split 8 volts into 128 equal pieces. By using the combinations of the inputs, you can reach all of these 128 points. In this way, without even thinking too much, when you combine 3-4 gate signals with this module, it will easily stop on the right notes, which is the right tune, just like in the tampere note system. The reason for this is that the module splits the voltage proportional. These CV signals you have got can be used in various modulations. It can also be used with an attenuator, a mixer and a multiple. The module is passive, and it does not require a power source."

DIY Drone Synthesizer : Vaemi

video upload by Vaemi

"It is a drone synthesizer that can be played with 4 analog channels or 4 voices. You can play it with the touchpads or the buttons. The main difference between the touchpads and the buttons is that the former reacts accordingly to the level of pressure you force upon them with your finger. In fact, each channel is designed as a monophonic synth voice, and each has a sustain-release 2-stage envelope and a basic vca. In total, it has 4 envelopes and 4 vcas. Behind the VCA, there is a 4- channeled mixer. This mixer is used for the summing of these 4 voice channels. A modulation of frequency between the Oscillators 1-2 and the Oscillators 3-4 is possible. At the very end of this diagram, there is an RC filter that can adjust the frequency rate and tune of the synthesizer. It can run with a 9v DC adaptor or with batteries. The audio output is designed as a 1/8mm TS jack.

Technicial Specifications:
• 4 Polyphony
• 4 Analog Oscillator
• Touchpads and Buttons
• 4 Analog Envelope (Sustain, Release)
• 4 Analog VCA
• 4 Channel Mixer
• 1 Analog RC Filter
• FM Modulation
• Can work with adapter or 9V battery
• Mono Output (1/8mm jack output)"

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Vaemi : Osi-Op Through Zero (TZ) FM Sounds by Tunç Çakır

video upload by Vaemi

Osi-Op : Using Through Zero FM Synthesis and VCA : Vaemi (Eurorack)

"Osi-OP, which we regard as an analog reflection of the new era of digital electronic music, is an analog and voltage-controlled oscillator module. It was designed in Eurorack format and it has a width of 14hp. The fact that it has Thru Zero FM Input and a Waveshape Output, which can be used for morphing, are two of the most important features of this product. From a first impression, it may look like an oscillator that is appropriate for subtractive synthesis; however, we actually designed it to be used for additive synthesis. Thanks to Thru Zero FM, this oscillator can regard oscillators with Sine Wave as analog operators. You can even prepare your synthesizer patch without using the classic subtractive resonant filter. The most important aspect of Thru Zero FM is that there is no tune drift when you increase the modulation rate. For this reason, Thru Zero attenuator (TZ FM potentiometer) can almost be used like a filter itself. the frequency of the second oscillator acting as FM (operator) according to the frequency of the 1st oscillator giving the fundamental frequency; must be set in harmonic degrees of the fundamental frequency. But at these settings the tonality can remain in and be musical. In addition to Square, Saw, Triangle, and Square Sub oscillator outputs, it has a Sine Wave Output, which was designed with JFET transistors and has a very low distortion rate, and a Waveshape Output, which was designed with Sine-Triangle and can be used for morphing. It also has a Wave Shape Input. It is connected to this input via the Triangle Wave circuit board inside. Sine Wave is fixed on Wave Shape but you can forward it to the other WS Input by patching other waveforms, and you can morph between two waveforms. The pulse width of the Square Wave can be adjusted. The same knob is the morphing knob of the Waveshape Output. Since the oscillator has tempco, there is a 1V/OCT calibrated CV Input that is sensitive to heat. It can perfectly stay in tune up to 3.5 octaves. In addition, for FM, there are two separate CV Inputs, Exponential and Thru Zero. While Exponential FM CV Input can take all types of DC and AC voltages, Thru Zero FM CV Input can only be used for AC audio rate signals. Also, when you enter a waveform on Thru Zero FM CV Input, oscillators are soft-synced automatically. With 1V/OCT CV Input, you can adjust the frequency of the oscillator; and with Exponential FM CV Input, you can easily add an LFO or Envelope Generator. Square Wave Sub OSC Output, which is completely synced with fundamental frequency and can give an octave lower than the fundamental, will help you a lot to create strong modern synth-bass sounds. It is made with NOS IC. When the oscillator is FM modulated, the Sub OSC never gets negatively affected by this modulation; and it can maintain giving the frequency clearly. You can also switch the oscillator to the LFO mode. You can create subtractive syntheses by using two or more of these oscillators or by mixing these waveforms. The main reason for us to design this oscillator is, as its name shows, to enable the creation of complex FM patches and sounds by using 2-3 or more of these oscillators, just like Operator FM. While Thru Zero FM increases the modulation, it can maintain giving the same frequency without losing the adjusted frequency; and you can add harmonics to the sound musically. The module has 5 knob controls, 4 CV Inputs, an input for Waveshaper, and 6 ±5V waveform outputs. Osi-OP, which is handmade and produced with the help of Through Hole technology, is a product consisting of electronic components that is carefully tested."

Vaemi Osi-Op Oscillator Eurorack Module

via Vaemi

Osi-OP, which we regard as an analog reflection of the new era of digital electronic music, is an high quality analog and voltage-controlled oscillator module. It was designed in Eurorack format and it has a width of 14hp. The fact that it has Thru Zero FM Input and a Waveshape Output, which can be used for morphing, are two of the most important features of this product. From a first impression, it may look like an oscillator that is appropriate for subtractive synthesis; however, we actually designed it to be used for additive synthesis. Thanks to Thru Zero FM, this oscillator can regard oscillators with Sine Wave as analog operators. You can even prepare your synthesizer patch without using the classic subtractive resonant filter. The most important aspect of Thru Zero FM is that there is no tune drift when you increase the modulation rate. For this reason, Thru Zero attenuator (TZ FM potentiometer) can almost be used like a filter itself. the frequency of the second oscillator acting as FM (operator) according to the frequency of the 1st oscillator giving the fundamental frequency; must be set in harmonic degrees of the fundamental frequency. But at these settings the tonality can remain in and be musical. In addition to Square, Saw, Triangle, and Square Sub oscillator outputs, it has a Sine Wave Output, which was designed with JFET transistors and has a very low distortion rate, and a Waveshape Output, which was designed with Sine-Triangle and can be used for morphing. It also has a Wave Shape Input. It is connected to this input via the Triangle Wave circuit board inside. Sine Wave is fixed on Wave Shape but you can forward it to the other WS Input by patching other waveforms, and you can morph between two waveforms. The pulse width of the Square Wave can be adjusted. The same knob is the morphing knob of the Waveshape Output. Since the oscillator has tempco, there is a 1V/OCT calibrated CV Input that is sensitive to heat. It can perfectly stay in tune up to 3.5 octaves. In addition, for FM, there are two separate CV Inputs, Exponential and Thru Zero. While Exponential FM CV Input can take all types of DC and AC voltages, Thru Zero FM CV Input can only be used for AC audio rate signals. Also, when you enter a waveform on Thru Zero FM CV Input, oscillators are soft-synced automatically. With 1V/OCT CV Input, you can adjust the frequency of the oscillator; and with Exponential FM CV Input, you can easily add an LFO or Envelope Generator. Square Wave Sub OSC Output, which is completely synced with fundamental frequency and can give an octave lower than the fundamental, will help you a lot to create strong modern synth-bass sounds. It is made with NOS IC. When the oscillator is FM modulated, the Sub OSC never gets negatively affected by this modulation; and it can maintain giving the frequency clearly. You can also switch the oscillator to the LFO mode. You can create subtractive syntheses by using two or more of these oscillators or by mixing these waveforms. The main reason for us to design this oscillator is, as its name shows, to enable the creation of complex FM patches and sounds by using 2-3 or more of these oscillators, just like Operator FM. While Thru Zero FM increases the modulation, it can maintain giving the same frequency without losing the adjusted frequency; and you can add harmonics to the sound musically. The module has 5 knob controls, 4 CV Inputs, an input for Waveshaper, and 6 ±5V waveform outputs. Osi-OP, which is handmade and produced with the help of Through Hole technology, is a product consisting of electronic components that is carefully tested..