Blake has updated His documentation with schemes...
https://github.com/blakelivingston/avr_tinytune

Hello.

I found very very nice project on Google Code.
It is sounds very similar to Nintendo NES's soundchip.
And what is very cool? There is tool which can convert RENOISE (XRNS) tracker module to C
and replay it on very small ATMEL attyny MCU.

SOURCE:

http://code.google.com/p/avr-lib-tinytune/

YOUTUBE:

http://youtube.com/watch?v=PtxxCKs822M

I plan to do very small PCB with stereojack and battery socket and 20mhz oscillator, DIP socket, resistors etc etc...

What you think about this?