[$14] DIY eurorack modular synth 2164 Quad VCO/LFO | SSI2164 based

video upload by HAGIWO

"My 87th original eurorack modular synth DIY projects.
SSI2164 based quad VCO/LFO. Soldering was terribly exhausting.
Self-patching allows you to create complex sounds. It's fun to use with noise machines.

working documents (schematics)
https://note.com/solder_state/n/nfc39...

Please support me to continue projects.
In patreon you will find content about my background , technical information.
/ hagiwo"

Meet You At The Top

video upload by davidryle

"A two part piece. Both are pitch voltage quantization controlled from the ACL Sinfonion. I switch presets through the first part from preset 1 - 4 and in the second half I leave it on preset 5.

The Sinfonion chord section is sending pitch quantization to the Doepfer A-111-4 quad VCO and A-105-4 quad SSI filter. The mixer is the Corsynth T-Mixer. The Empress reverb in Ambient Swell green mode is used.

The opening voice is Channel 2 of the Sinfonion and is sent to the Dotcom Q206 with the Dove D502 in BP mode P1, then an SSL Serge Resonant EQ and finally the Strymon Blue Sky.

A counter voice is the Channel 3 quantizer to a pair of Synthetic Sound Labs TZ-VC Oscillators to the Oakley VC-SVF in BP mode. The audio is routed through a Moon 517S high pass filter to roll of the lower mid tones. I used an instance of Relab Development's LX480 classic Lexicon reverb. This same voice is used for the main melodic part in the second section.

The Channel 1 of the Sinfonion is to the bass voice which is the Dotcom Q169 Oscillator++ and Grove Audio G294A ladder filter.

The Sinfonion arpeggiator part is to the STG oscillator duet and the Dove D501 2069 filter. The signal is sent through the Modcan 73B dual delay. In the first section this voice is solo, but in the second section I added in a duplicated run of the MosLab 901/904A through a different envelope which is timed a bit more sparse and sent through the second section of the 73B delay.

Most of my time was spent mixing levels and changing the timing of the SSL Hagiwo Geo-Gruvn euclidean sequencer. The clock timing was controlled by row 3 of the Moon 563 trigger seq. I used two different memory presets on the Geo-Gruvn for each section. These timings were used for the gate controls to the SSL Octal VCA, CV-8 Breakout and AD/AR Expander. The eight channel vca handled four of the voices. Very cool array of modules.

I also sent and effort to control the timing of the STG Voltage Mini Store's timing with row 2 of the 563. The right VMS is used for the Root control to the Sinfonion. The faster moving left VMS is to the arpeggiator of the Sinfonion.

The Sinfonion is using various cv's from the Q960 step sequencers to affect the chord spread and note selections. Also an LFO is used to affect the pre-transpose of the chord section.

A convoluted patch using the Lower West Side Studios CGS88 triple switch, the Dove D900 sequencer and three voltage sources to send control voltage to the transpose on the Sinfonion. I used the Moon 564 trigger stage 1 to turn this on and off by hand when needed.

The final clangorous opening and ending patch voice was the Mutable Instruments Rings through the Behringer Bode Frequency Shifter clone and the Encore Frequency Shifter, and on through the Tip Top Z-DSP signal processor running Halls of Valhalla reverb (Niflheim preset). It was also the midway noise rush background sound where the sections changed. These were added later in Cubase and triggered by hand.

The sections were performed at once live to Cubase and video edited in Final Cut Pro."

[$27] DIY PCM MIDI Sound module | SAM2696 & XIAO MIDI Synthesizer based

video upload by HAGIWO

"PCM MIDI sound module based on the Seeed Studio XIAO MIDI Synthesizer. It plays using external MIDI signals, and the four built-in buttons can also be used to change parameters. working documents (schematics & source code) https://note.com/solder_state/n/n1f2e... XIAO MIDI Synthesizer https://www.seeedstudio.com/XIAO-MIDI..."

You can find an overview video of the Seeed Studio XIAO here.

A Towel For Ms Winters

video upload by davidryle

"Large format modular synthesizer recording live in the studio.
The opening noise burst is the Dove WTF in noise mode along with the Sputnik WCRS to an Oakley SVF in band pass mode to the Modcan 73B dual Delay and Z-DSP with Halls of Valhalla reverb. Modulation to the 73B is from the STG Voltage Mini Stores for delay cv.
Noise cacophony part is a pair of STG Soundlabs Oscillators to the Oakley Sound Systems Ring Modulator to a Grove Audio LPF and a MegaOhm Audio MA20 in highpass mode. The signal is sent to a tape echo then compressor.
The echo drone bass is the dotcom Q169 vco to a Moon 517S LPF. The echo delay is a stereo Lexicon MX200.
The lower bass tone is the Woven Spirits (MI Plaits) from Synthetic Sound Labs. Straight in, no filter or envelope. The chords are a pair of dotcom Q206 vcos and a pair of Q106 vcos for four part harmony. The cv source is the dual Matrix from SSL in dorian modes. A pair of dotcom Q171 and Q172 Quantizers were used with gates from the Geo-Gruvn to time the S&H pitch voltages. Toward the latter half of the piece I was playing the quantizers to change modes from augmented to diminished and back again. The audio signals are sent through a LWSS Yusynth panning mixer then a pair of filters. The Dove D502 in low pass four pole and the Frequency Central System X in 24dB low pass mode. They are sent to the Empress Reverb pedal in blue sparkle mode.
All gate timings were provided by the SSL Hagiwo Geo-Gruvn sequencer and the STG Time Divider. Additional divider s are the Moon 564, Moon 563 and STG Trigger Mini Store.
The theme here was the well known stories of the femme-fatale-gone-awry roles Shelly Winters played in many famous movies. She was drowned a few times and it became an urban legend of sorts. A great actress that rarely was rewarded with much favor but did finally reach a celebrated status."

DIY eurorack modular synth | MOD2 Break beats : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Break beats:
PCM break-beat playback module. Slice points are pre-programmed into the MCU and can be selected via CV."

https://note.com/solder_state/n/n33132a160afb

DIY eurorack modular synth | MOD2 VCO : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI. With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

VCO:
V/oct tracking , 6 waveforms.

MOD2 is not a module designed for use as a VCO.
It has a limited number of CV inputs and cannot modulate the timbre.
It is a technical test program intended to verify functionality as a simple oscillator.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/n2214...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD1 VC Switch 1in-2out : Arduino based general-purpose module

video upload by HAGIWO

"This module is an open source general-purpose CV/Gate module based on Arduino nano.
It can be applied to various CV/Gate modules by changing the program.
There are some performance limitations, but it uses general-purpose inexpensive components.

VC Switch :
1in - 2out Analog signal switch module.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/na31f...

Code with WAV samples included
https://www.patreon.com/posts/code-fo...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

Ancient Passage

video upload by davidryle

"This basis of this project was between the new Synthetic Sound Labs 1655 Geo-Gruvn euclidean sequencer and a few different Low Pass Filter modules. The new SSL 1015 LPG with the cadmium sulfide CdS element, the Mega Ohm Audio CdS VCF/A module and the Cyndustries Quad Low Pass Gates module. The Cyndustries module was enhanced by Phil from Mega Ohm Audio to be much more responsive. A big change and very useful.

The Geo-Gruvn module from SSL is an adaption of the Hagiwo board and was also enhanced to provide a more efficient response all the way to audio rate clocking.

The main orchestration automation module in this piece was with the synthesizers.com Q170 Midi Gates module. The use of eight channels of midi gate streams from Cubase were the way each section were enabled on and off. My hands-on modulation was simplified to allow me to change timbre, filter settings and delay rates with ease.

The center section featured the Dove Mu-Seq D900 sequencer for a pattern which began by me running the sequencer in reverse and recording the track to Cubase, then reversing it back into the mix. I started with the Woven Spirits (MI Plaits) at a higher octave and drew it down until it matched the timbre for the rest of the midsection.

The last part was the dual Matrix run into a pair of quantizer modules in which I timed the pitch voltage outputs with the Geo-Gruvn gate outs. These voices were the Dotcom Q206 and Q206A modules through the Frequency Central X Series Low Pass Filter and an Empress Reverb pedal.

Other delays included the Modcan 73B dual delay with loads of modulation, and the SSL 1310 Digital Delay.

The opening drone is a feedback from the TipTop Audio Z-DSP VC-Digital Signal Processor with the Halls of Valhalla chipset in Plate Reverb mode. This drone also arose in the center section.

A pair of frequency shifter modules (Encore Electronics and Behringer Bode Clone) were used for the Snare and Hi Hats enhancement. The kit drums were the LDB-2E Analog Drums from Delptronics and the TipTop SD808. They were sequenced from the Mutable Instruments Grids module and a pair of Turing Machines and an MI Marbles module."

Synthetic Sound Labs - Geo-Grüvn and Lowpass Gate

video upload by NOISEBUG

"Two new releases from Synthetic Sound Labs that happen to play very well together. The SSL-1015 Lowpass Gate and, the Model 1655 - Geo-GrüVN
Add some Euclidean variation and snappy west coast percussive melodies to your 5U/MU systems. Head to noisebug for more info
#umodular #synth #modularsynth #synthesizer

https://www.noisebug.net/collections/..."

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DIY eurorack modular synth | MOD2 Sample Player : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Sample player:
WAV sample player.
It is possible to save audio files up to a total of 20 seconds / 18 files.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/na31f...

Code with WAV samples included
https://www.patreon.com/posts/code-fo...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 Snare : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Clap:
TR-808-style digital snare: sine-wave with pitch envelope + blue noise

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/nd5c8...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 Clap : RP2350 based drum module

video upload by HAGIWO

"Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI. With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Clap:
TR‑808‑style hand‑clap.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/n9e17...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 HiHat : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350. Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI. With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

HiHat:
white and blue noise base HiHat.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/n171d...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 FM Drum : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

FM Drum:
Two‑operator FM percussion voice for Eurorack.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/n5ff2...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp...

DIY eurorack modular synth | MOD2 Claves : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.

With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Claves:
A simple claves sound source.
The waveform mixes sine and triangle waves at an arbitrary rate.
The pitch CV follows the V/oct.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/ne976...

PCB gerber data & PCB assy production data Download
////In preparation (scheduled to be uploaded to Patreon)////

Please support me to continue projects.
In patreon you will find content about my background , technical information.
/ hagiwo

-------------------------------------------------------------
Repository of HAGIWO's DIY Modular Synth
https://note.com/solder_state/n/n54e0..."

DIY eurorack modular synth | MOD2 Kick Drum : RP2350 based drum module

video upload by HAGIWO

"Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI. With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Kick:
Sin wave base , 6 parameters kick drum.
Pressing the button will change the assigned parameter.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/nbdea..."

MOD2 Prototype test | Seeed XIAO RP2350 based Drum module for eurorack

video upload by HAGIWO

":Almost all of the programs were generated by ChatGPT.
Since the circuit has been simplified, there are few CV inputs and the audio is output via PWM, but the RP2350 is fast enough that even a simple program can produce reasonably good sound.

Although there are no plans to use it as a VCO, it also supports V/oct.
-------------------------------------------------------------
Repository of HAGIWO's DIY Modular Synth
https://note.com/solder_state/n/n54e0..."

DIY eurorack modular synth | MOD1 Square VCO & 3ch LFO : Arduino based general-purpose module

video upload by HAGIWO

"This module is an open source general-purpose CV/Gate module based on Arduino nano. It can be applied to various CV/Gate modules by changing the program. There are some performance limitations, but it uses general-purpose inexpensive components.

Square VCO:
Audio output operation is somewhat unstable and produces a noise sound.

Square wave oscillator with V/oct support.
LFO for vibrato and octave like chiptune.
The capacitor in the D11 output circuit needs to be removed."

DIY eurorack modular synth | MOD1 3ch LFO : Arduino based general-purpose module

video upload by HAGIWO

"This module is an open source general-purpose CV/Gate module based on Arduino nano.
It can be applied to various CV/Gate modules by changing the program.
There are some performance limitations, but it uses general-purpose inexpensive components.

3ch LFO :
1 CV in , 3 CV out.3 waveform."

DIY eurorack modular synth | MOD1 Clock sync Trigger burst : Arduino based general-purpose module

video upload by HAGIWO

"This module is an open source general-purpose CV/Gate module based on Arduino nano.
It can be applied to various CV/Gate modules by changing the program.
There are some performance limitations, but it uses general-purpose inexpensive components.

Clock sync Trig burst :
When POT3 is turned fully left, it accepts an external clock for F1.
When POT3 is to the right of 9:00, it switches to the internal clock.
The internal clock can be adjusted with POT3.

working documents
https://note.com/solder_state/n/nc05d...
https://note.com/solder_state/n/n59f6...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod1-ar..."

DIY eurorack modular synth | MOD1 Random CV sequencer : Arduino based general-purpose CV/Gate

video upload by HAGIWO

"This module is an open source general-purpose CV/Gate module based on Arduino nano.
It can be applied to various CV/Gate modules by changing the program.
There are some performance limitations, but it uses general-purpose inexpensive components.

Random CV sequencer : Periodic random CV sequencer.

working documents
https://note.com/solder_state/n/nc05d...
https://note.com/solder_state/n/nd2af...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod1-ar...

Please support me to continue projects."