measuring audio latency?
dank at kegel.com
Wed Mar 10 07:42:13 CST 2010
On Wed, Mar 10, 2010 at 12:25 AM, Reece Dunn <msclrhd at googlemail.com> wrote:
>>>> Yes, absolutely, but it'd be good to make this measurement easy
>>>> to repeat by anybody interested. To do that, let's just loop the
>>>> audio output back into the audio input. The user will have to
>>>> provide a loopback cable (or, worst case, put his mike right up
>>>> to the speaker, and allow for a tiny bit of extra latency
>>>> from that).
> But if all you are interested in is the relative latency changes, then
> any additional latency effects should not matter as long as that
> latency added is constant.
> What is being checked is that the latency of wine+OpenAL is not
> noticeably greater than the current wine+ALSA implementation (that is,
> OpenAL has a latency that is at worst equal to ALSA as used by wine to
> within a certain tolerance for error).
Ideally we'd also run the app with other combinations
as well (say, wine+OSS, or XP+ASIO, or Windows 7)
to make sure we're not aiming too low.
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