Wonder if you could use good old AM for this, maybe like so:
1) each character lasts for 1 second
2) there are 32 distinct pitches,just plain cycle~ objects, in a good range for fiddle~
3) if there’s no change in amplitude through the pitch, it’s bank 1; if there’s one "dip", it’s bank 2; etc. up to 4 banks. Or 16 pitches with 8 banks. Should be able to decipher the dips at the other end with some patching, counting the changes in amplitude over the second timespan. Maybe you can get a lot faster too.
So, just using a simple cycle~ and *~ to modulate the outgoing pitches the right number of times per second should (in theory) work… might sound cool too.
If you get a more robust fft~ kind of analysis going, you can add different cycle~ objects together to make different ascii values: if there’s only a fundamental pitch, it’s bank 1; if there’s a first harmonic, it’s bank 2; etc.
edit: you could make the different banks based upon overall pitch loudness, would be a lot easier, doh :
