Re: [alsa-devel] Fast Track Ultra latency and new streaming logic.

Felix Homann wrote:

I've even done some measurements using jack_iodelay. At 96 kHz I get a total round trip latency of 17.5 ms. According to the jack_iodelay manpage this corresponds (if I get it right) to an hardware input/output latency of the device of ~584 frames (6.1 ms).

USB playback also adds further latency by queueing the packets; the number of packets can be seen under "URBs" in /proc/asound/card?/stream0. (There are 1000/8000 packets per second at full/high speed.)

Regards, Clemens