Optical Touch Mini Synth
A seven voice string, drum, and tone digital synthesizer with 7 touch pads and an optical proximity sensor. The optical proximity sensor does effects bending. Three control dials select the pitch, instrument, and distortion effect.
The technology is STM32 DMA DAC signal generation and an active filter, producing 16 bit single channel (mono) sound.
The software is Arduino compatible and available for download below.
|Bill of Materials||bom_j210_optical_touch_mini_synth.pdf|
|Power Requirement||5.0V 500mA USB micro jack|
|Output||Audio line level, 3.5mm stereo jack|
Requires powered speakers or amplifier.
Connect 5V USB power source and 3.5mm stereo audio cables. The audio output is the same on both left and right channels.
|Touch pads||Play the instrument|
|Pitch||Sets the frequency range for the touch pads|
|Wave||Selects the instrument; tone, string, drum|
|Effect||Selects the distortion effect|
|Proximity sensor||Bends the instrument frequency|
|CLK||Normally on, indicates the audio bit clock is running|
|DMA||Gets brighter as DMA load level increases|
|ERR||Audio processing overload - this won't happen unless you modify the instrument code|
|Available fully assembled and tested|
|Buy it at Tindie|