But that surely isn't bitperfect, right?
2008/10/27 James Courtier-Dutton James@superbug.co.uk
I added that comment (takashi cut and pasted my text). No resampling is done. Say you have a buffer that is running at 48kHz. So you have say 480 samples at the 48kHz rate. But if you want to transfer 44.1kHz rate samples over it, you only want 441 samples to be there, so what to do with the left over 39 samples. What the xfi does is next to each sample it adds a "valid" tag. So, the xfi adds those 39 samples but marks them as "invalid". The xfi then drops the 39 "invalid" samples, leaving only the 441 "valid" samples just before sending them at 44.1kHz to the DAC. Does this explain things a bit better. FYI, the xfi actually works internally at 384kHz, so it is actually marking a lot of samples as "invalid".
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