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Old 07-25-2011, 05:17 PM   #1
Radiolocman Robot
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Default Discussion: 255-Voice PCM Sound Generator. Part 1. Schematic

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This is a simple sound generator based on 8-pin SD Audio Player. It is built with an Atmel ATtiny861 microcontroller from Atmel and an SD memory card.
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Old 07-25-2011, 05:17 PM   #2
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Thanks so much for sharing this. It is perfect for a project I am working on. I have three questions for you: (a) Your mono (OCL) configuration implies that the output signal is differential in that case. Is that true? (b) If so, any particular reason I should not prefer that with an Amp as opposed to the Mono (Hi Res w/ Amp), which appears to mix two single-ended signals prior to amplification? (c) Can you suggest a simple (couple of Watts or so) Amp design? Since the signals are PWM I'm thinking just a couple of FETs to boost current might be sufficient (i.e. the output stage of a class D amplifier)?
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