I have created a fully analog polyphonic drone synthesizer and would like to share it with you. This is an 8-voice polyphonic synthesizer with a touch keyboard.

You can build it yourself by getting all the necessary files for this on my github:

https://github.com/EugeneCarlo/Mushsy...

I purposely used very affordable and inexpensive components to create it.

Each voice is a monophonic subtractive synthesizer, parallelly combined into a common low-pass filter and has on board:

• An oscillator with adjustable pitch and switchable waveform (Triangle/Square)
• An LFO with speed and depth controls to modulate the pitch of the oscillator.
• An envelope generator with attack and decay speed adjustments to control the VCA.
• Individual volume control for each voice.
• To control the envelope generator, capacitive sensors are used, which can operate in two modes (hold or momentary).

Eight such voices are combined into a single low-pass filter and delay. I have also added an independent knob for adding white noise.

Each voice can be controlled by CV/GATE which is set to each voice.

Technicial Specifications:

• 8 Polyphony
• 8 Analog VCO
• 2 Waveforms VCO
• 8 Analog LFO (Speed/Depth)
• 8 Analog Envelope (Attack/Decay)
• 8 Analog VCA
• 8 Channel Mixer
• 8 Sensor touch panel
• 1 White noise generator
• 1 Analog LP Filter
• 1 Delay PT2399
• 8 CV inputs
• 8 GATE inputs
• Can work with adapter 9V
• Mono Output (6.3mm jack)
• Circuit banding area (bread board)

My social media links:

https://github.com/EugeneCarlo

https://vk.com/bycarlo

https://t.me/ass_online

https://t.me/sborkasobaka (Chat where we communicate in Russian)

Donations:

https://boosty.to/bycarlo/donate

https://vk.com/app6471849_-114519110