USB sound card issues

[Muni Sekhar]

On Tue, Jun 15, 2021 at 11:44 AM Valdis Klētnieks
<valdis.kletnieks at vt.edu> wrote:
>
> On Sat, 12 Jun 2021 16:45:00 +0530, Muni Sekhar said:
>
> > > And if it's configurable for multiple formats, was it set for the correct one?
> > Is there a way to verify was it set for the correct one or not?
>
> arecord -v gives what it thinks the setup is.
>
> > > Does the record die immediately, or hang for a few seconds and timeout?
> > What is the difference between these two ways?
>
> An immediate failure is usually related to a "Can't do it" situation where the
> USB interaction to configure the device has failed, while a timeout usually
> indicates that the configuration at least *claimed* to succeed, but is failing
> to properly transfer valid data.
>
> > For my hardware, I noticed that it hangs for a few seconds and gives EIO (arecord:
> > pcm_read:2032: read error: Input/output error).
>
> Given that the usbmon output ran to several megabytes, that's tending to
> point at "the card was returning lots of packets, but they weren't actually the
> format/data that arecord was expecting.
So, is it a USB card issue?



-- 
Thanks,
Sekhar