'TinyRhythm'

Multichannel Midi-Triggerinterface with onboard digital drumsynth

Snaredrum 1

<< back to Tiny Rhythm overview

The first module. Also the most minimalistic one. Just 2 chips: a tiny13 and an opamp.

Function

The 3 ADCs alter variables inside the mainloop for noise and generation of squarewave. First i got a delay in the mainloop with its number of counts tied to an ADC. The more you turn the pot, the higher the voltage on the adc and the longer the delay inside mainloop until we advance in code. This results in a total lowering of frequency. But thats bad style :( ... the delay also slowers other routineblocks, e.g. for soundlength. Using such a delay also makes length of sound-output longer if you lower the oscillatorfrequency.

The better one is to have steady counter running. If it exceeds the value of the ADC you reset it to 0 and run a routine for updating the oscillator. Result for frequency is the same but it keeps soundlength independant.

click opens large version in new window

kind of functiondiagram