Nope, no BASIC stamp or DSP, too advanced me to tackle for now. Maybe in my DAC project I'll try some DSP work to get HDCD working on the digital filter. The big chip on the board is just a Crystal CS8405 IC that combines the various timing and data signals of an I2S stream into an S/PDIF stream. Thanks for the compliment on the boards.

Stu
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If you want it to break, buy Sony!