[linux-audio-dev] External audio interface (edirol FA/UA-101)

[Dmitry Baikov]

<http://freebob.sourceforge.net/index.php/Some_emails_about_latency>

> http://freebob.sourceforge.net/index.php/Some_emails_about_latency 
> <http://freebob.sourceforge.net/index.php/Some_emails_about_latency>


> the minimum round-trip latency I achieve with our current code is about

> 8ms, but there are some bugs that pop up at these low buffer sizes.
> the minimal round-trip latency that gives rather reliable operation is
> about 14ms.

Thank you for the link! Some real numbers, finally :)
FW solution seems to be worth considering.

> note that I measure 'round-trip latency' by connecting a cable between
> output and input of the soundcard and then  look at the time difference
> between the played sound and the recorded sound.
>
That means 8-14ms is really excellent, as it takes into account DAC/ADC 
buffering.

> I'm working on a better driver structure/code that will allow lower
> latencies.

Amazing! If I purchase FA-101 earlier, than you finish, I'll try to help.

Dmitry.