[linux-audio-user] Edirol UA-25: Any issues?

Clemens Ladisch clemens at ladisch.de
Fri Nov 18 02:37:16 EST 2005

Cesare Marilungo wrote:
> I can run it at 11.6ms (5.8+5.8) full duplex without any xrun. Lower
> latencies work but I get some xrun every now and then.

All USB audio devices move data in one-millisecond packets, so the achievable
latency depends _only_ on the software, not on what device you use.

> Anyway I doubt you can get a greater bandwith with usb 1 at 24bit.

The theoretical limit of USB 1.x is 12 Mb/s (i.e., 1,500,000 bytes/s).
The Audigy 2 NX can do eight channels with 16 bits at 48 kHz (750 KB/s),
but full duplex stereo with 24 bits at 96 kHz would need 1125 KB/s which
is too much considering the protocol overhead.


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