&gt;&gt; A suggestion: start with providing just digital interfaces: ADAT, and <br>
&gt;&gt; MADI if you&#39;re ambitious. Both are quite straightforward. ... <br>
&gt;&gt; I wouldn&#39;t forget poor old AES (including SPDIF.) <br>
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How about a standard adc stage with FPGA processing/routing and I2S bus. For ADAT there are already the OPTOGEN and OPTOREC modules (dont have the links right now). Then ADAT and spdiff/aes-ebu as standard interfaces. An optional XMOS low cost board for avb, which is capable of I2S. And a FPGA extension board for MADI and ieee1394 also connected via I2S. <br>
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I kinda like the idea... could be highly flexible... <br>
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Second step: same device as DAC...<br>
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Sorry fucked up the subject...<br>
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Ck