Remember that the systemic latency for all USB audio devices on Linux can
(and likely will) change every time the device is re-opened (re-used). This
is a feature (bug) of the kernel USB audio class device support.
On Sat, Mar 20, 2021 at 11:07 AM Lorenzo Sutton <lorenzofsutton@email-addr-hidden>
wrote:
> Hi David, all,
>
> Creating a new thread as the old one was pretty long...
>
> On 19/03/2021 15:22, David Kastrup wrote:
> [...]
>
> >> - Zoom H5 shows 4 inputs in jack: the L/R mics and the inputs 1 and 2
> >
> > Oh, can you just put the headphones right next to the mics (makes
> > astonishingly little difference in comparison to direct connections) and
> > use jack_iodelay for measuring out the latency of the H5 with your
> > settings?
> >
> > Numbers are surprisingly hard to come by for any audio interface.
> >
>
> This is what I got by connecting jack_delay to one output and putting
> the headphone right in front of the microphones (connected only one to
> the jack_delay input). These are common jack settings I use or have used
> with this device, although the 32 Frames is very unstable and the 64
> Frames one gets a few xruns depending on what it's used with (but still
> more usable). The 128 Frames settings is very stable.
>
> SR Fr/p Avg. delay reported (ms)
> ------+-------+-------------------------
> 48000
> 128,2 22.7
> 64,3 18.7
> 32,3 14.2
>
> 44100
> 128,2 25.2
> 64,3 20.6
>
> 96000
> 128,2 22.6
> 64,3 18.6
>
> 88200
> 64,3 18.6
>
> Hope this is useful /interesting
>
> Lorenzo.
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>
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Received on Sun Mar 21 04:15:01 2021
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