Reader Writes: Hi, I wrote some code that easily and cheaply allows audio of any frequency from sub audible to ~8khz to control an LTC1799, or really anything that uses resistance to change a parameter. It’s also able to be controlled by internal 8 bit wavetables. Documentation of that will follow as well. I implemented this with just two chips-an Attiny85 and also an MCP41100 digital pot.
In this configuration, it also doubles as an 8bit DAC. It’s also possible to sequence relays from incoming audio to have tempo controlled sequencing of bends. I’m planning on adding midi code once I start working on the vanilla Arduino port of this.
Here are some examples of this idea in action.