[alsa-devel] ALSA / Soundcard latency

[Clemens Ladisch]

Feilmeier Daniel (Ask De) wrote:
> We have very strong requirements regarding the maximum latency from
> audio input via line in to audio output. We would like to achieve a
> maximum latency < 1ms. The alsaloop example mentions a latency of 1 ms
> which is on our test setup

What hardware?  USB and FireWire have long packet queues.

> We tried different soundcards and found out that they have an
> internal FIFO, which seems to be one of the limiting factors.

What are the numbers?

What settings did you use for alsaloop?


Regards,
Clemens