I am trying to build a USB sound card and trying to finalize the specs. It will have USB to I2S converter (part of PCM2706) connected to DAC. Since PCM2706 is only doing USB to I2S format conversion, samples (WAV) and sample rate (16 bit, 48Khz) remain unchanged. Shall I safely take that PCM2706 USB-I2S conversion will not alter the following parameters before passing the digital audio to the DAC. (assuming no jitter)
THD+N Noise Floor Dynamic Range SNR
Thanks
-m
Of course. That's the beauty of digital. As long as you don't change the numbers, signal quality is preserved perfectly. Aren't you in over your head a little if you need to ask such questions?
Jeroen Belleman
"Mahen K" schrieb im Newsbeitrag news: snipped-for-privacy@t34g2000prm.googlegroups.com...
A bit is a bit is a bit. You can degrade the quality by bad layout, which is the analogue part of the task, but if you just migrate the hardware to the dongle or whatever it should do a decent job. Of course the supply has to be well decoupled and filtert. ciao Ban
The "assuming no jitter" could turn out to be the place where your design fails. You need to make that "making sure to keep the jitter within the specs" The jitter of the timing is the one place where noise etc can sneak into your design. The digital signals cn be considered perfect except for this issue.
The noise floor can be lost if you let the digital bits leak into the audio part of the design.
That should be OK, however, you will need data buffering to deal=20 with the bursty, discontinuous nature of USB.
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