Roman Black

The BTC Sound Encoder 1.1 is software that www.RomanBlack.com has written for the purpose of converting sound (in wave files) to a 1-bit format that can be played back on very cheap hardware, like a microprocessor chip (ie PIC, Atmel, Motorola etc).

Version 1.1 is limited to a maximum wave file length of 530,000 samples, this gives a max output file size of 530,000 bits, which is enough to fill a 512kbit eeprom (524,288 bits). At 15625Hz this gives a full 33 seconds of sound playback, enough for 50 spoken words.

Zero-error 1 second Timer
A very versatile Zero Cumulative Error timing system with PIC source code.

Bresenham's Algorithm is a system where 2 imperfect periods can be alternated to produce an average that matches any "perfect" period.

http://www.romanblack.com/picsound.htm