WMD Pro Output Headphone Amp & Output Module

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Perfect Circuit Audio (RSS)

"Balanced professional grade outputs and high quality headphone driver!

The WMD Pro Output is a simple and purpose built module to get your modular signal interfaced with professional and consumer audio gear. It also includes a very high quality headphone driver.

Rail to rail opamps at the input stage allow for headroom above the typical eurorack levels of 20Vpp. The Pro Output can handle 23Vpp before clipping. Signals are attenuated down to the proper levels allowing for simple adjustment free connection to any type of device, professional or consumer.

The Pro Output is DC coupled through the entire signal path, including the headphone driver. This design eliminates coupling capacitors and the distortion they can cause.

Controls and I/O

Input - The inputs are designed to accept any normal modular level. 10Vpp is the nominal operation level. The left input is normaled to the right side for mono operation. Inputs will clip at 23Vpp, giving enough headroom for any eurorack signal.

Phones/Line - The headphone driver connects to a 3.5mm stereo jack, and a 1/4" jack for whatever type of headphones you use. It can drive both simultaneously.

The headphone output level is internally limited to protect against accidental knob turns. Connect a couple of jumpers to the rear of the module to disable this limiting. This will allow the headphone amp to drive headphones extremely loudly, but still without distortion. Output quality remains the same regardless of the jumper settings.

With the limiting enabled (jumpers off), the maximum output is around -10dBV. With limiting disabled (jumpers on), the maximum output increases to pro level, about +4dBu.

Stereo - The Stereo (-10dBV) output is designed to interface directly with consumer level gear. Hook directly to sound cards, portable recorders, and speakers. It can be used as a second headphone output but will be loud.

+4dBu Bal - These two outputs (left and right) are high quality low impedance balanced line drivers. They are designed to drive long cables and to drive balanced transformer or transformerless inputs. Use these to connect directly to mixing consoles, mic preamps, or any other piece of professional outboard gear.

Features

High Headroom
Low Distortion / Low Noise
DC Coupled Signal Path
-10dBV Stereo Mini-jack Output
+4dBu Balanced Outputs
High Quality Headphone Amplifier
Loudness Limiting (Can be Disabled)
3.5mm and 1/4" Headphone Outputs
Completely Transparent Signal Path
6 HP, +60mA/-60mA"

Gieskes VCO Fan Oscillator Module

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Perfect Circuit Audio (RSS)

"The VCOFan is VCO that uses a fan as a sounds source.

There is a LED under the fan that shines onto the blades of the fan, the fans bottom side is spray painted white, so the light from the led reflects from the blades. Next to the LED there is a LDR that translates the reflected light into a voltage, which is the audio signal.

Connections: The top connector is the CV input for the Fan speed (0v to 12v). The middle connector is the CV input for the LED brightness (0v to 12v). The output is the bottom connector, it is a audio signal that is capacitor coupled.

Potentiometers: The top potentiometer sets or attenuates the Fan speed. The middle potentiometer sets or attenuates the LED brightness. The bottom trimmer potentiometer (under the 2mm hole) sets the audio output volume.

Features

CV input for Fan Speed
CV Input for LED Brightness
Audio Output
Fan Speed Control
LED Brightness Control
Trimmer for Audio Output Volume"

Gieskes HSS3j Audio Video Synth Synthesizer

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Perfect Circuit Audio (RSS)

"It's a synth and video experimental toy! Plug it into a screen and voila, instant 80's video sync with internal audio.

Features

16 Selectable Audio/Video Synths
8 Video Synths
Analog Lowpass Filter
Composite Out, NTSC or PAL.
Line In (can take any signal from 0V to 12V)
Line Out
MIDI In
Trigger Out
Trigger In
IR In
IR Out
Composite Video Out"

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Gieskes DEP2b Digital Effect Processor

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Perfect Circuit Audio (RSS)

"The DEP2b is an 8-bit digital effects processor based on sampling. The audio sample can be looped, delayed, pitch shifted, and stretched. The unique possibilities are endless.

Features

8 Bit Conversion
3 CV inputs (0 to 5V, clipt)
Power 9V DC minus in the center. (works best with BOSS stabilized power supply).
Audio in 1/4 jack.
Audio out 1/4 jack
True Bypass Switch
Low Frequency Cut after DAC
Hold Button
Feedback Button
Cut Audio Input Button
Sample Now Button
Sample Rate Divide Button
Audio Input Volume LED
Audio Input Trigger Active LED
Potentiometers Control
Sample Rate Divide Control
Sample Length or Pitch Sequence Select Control
Variable Control
Audio Threshold Control
Resonance Low-Pass Filter Control
Low-Pass Filter Control
DAC Volume Control
Output Volume Control"

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Gieskes GVS1c Arduino Video Sampler

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Perfect Circuit Audio (RSS)

"The GVS1 is an Arduino video sampler with 1 bit resolution, and can capture 20 frames of video. It will always need a video input connected, because it uses the inputed video signal to sync to.

Features

1 BIT Video Sampler
Resolution 128x96
Lowpass Filter on Video (for analogue/antialias look).
PAL or NTSC Compatible
Mono Jack 3.5mm Audio/Trigger In
Composite Video in RCA Jack
Composite Video Out RCA Jack"

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Gieskes Oscillatoscope1a CV to Video Audio Converter

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Perfect Circuit Audio (RSS)

"It can convert CV (and optional audio signals) into video and audio. It works by changing the frequency of oscillators that are synced to a composite video sync generator.
The signal that is generated is output as audio on a mini jack connector, and as video on the RCA jack connector.

Features

3.5mm jack CV A: 0 to 5v
3.5mm jack CV B: 0 to 5v
3.5mm jack starve: 0 to 5v
RCA: Composite Video
3.5mm Jack Audio: Audio Output
Starve (attenuation for CV) Control
Left Bottom: Pitch A (range for CV) Control
Right Bottom: Pitch B (range for CV) Control
2 Mid Pitch Momentary Buttons
2 Sync Horizontal, Vertical, or Off Selection Button
2 Frequency Range Buttons
Interlaced or Progressive Selection Button"

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Gieskes VoiceRec1b Voice Recorder Module

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Perfect Circuit Audio (RSS)

"The Voice Rec module uses a voice recorder chip to record and playback sound. All controls are based on the functions that are in the chip (ISD 1820PY).
In the beginning and end of recording, there is an audible click. So, it is best to play back longer samples. The sound quality is very low.

An external mic or line level audio signals can be used. It has automatic gain adjustment.

Features

Audio In
Gate In Record
Trigger In Playback
Gate In Playback
CV In Pitch
Audio Out
Playback Time Control
Pitch Control
Cross Fade Control"

Gieskes Analog HD2 HD 2 Hard Disk Instrument

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"The Analog HD 2 is a turntable-like hard disk instrument.

Features

"Scratch-able" Disk
Pitch Control
Speed Control
Makes Cool Noises"

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Gieskes Tiny WTR Optically Controlled Wavetable Radar

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Perfect Circuit Audio (RSS)

"The Tiny WTR is a wavetable radar. It is controlled with an optical theremin, meaning it responds to light.

Features

3-Bit DAC op amp buffered output.
512 step wavetable.
64 steps sequencer.
+/- 3.7 octave range.
Set Sequencer Length and Vibrato Speed (by holding the button down during power up)
Line Out (also works with headphones)"

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ALM Busy Circuits Pamela's Workout Clock Source Eurorack Module

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Perfect Circuit Audio (RSS)

"'Pamela's Workout' is a compact programmable clock source for your Eurorack modular synthesizer system. It provides 8 highly editable trigger outputs,
all correlated to a direct and voltage controlled BPM based clock. Pamela's workout grew out of a need to flexibly synchronize various clocked modules
and external devices but do so in flexible and feature-full manner as to also enable more creative and playful rhythmic usage.

Features

BPM based clock with rates 25-300BPM.
8 clocked Trigger outputs each with independent adjustable;
Clock divisors and multipliers
32 values from from /512 to *48 • Triplets, Evens, Odds etc
Pulse width
Random skip
Delay and delay division (for complex shuffle) • Beat Offset
Voltage and direct control of clock stop/start and reset.
Voltage control of clock rate.
Sync to an external clock input at 24, 16, 12, 8, 4, or 1 PQN.
Simple realtime user interface with vintage LED display.
Non-volatile - settings remembered between power cycles
Easy firmware upgrades with no special hardware needed just an audio out. • Provides DIN Sync input & output with simple adaptor.
Skiff friendly
Made in England"