[pulseaudio-tickets] [Bug 49056] Pulseaudio does not detect external USB iO4 4-channel input source

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49056

--- Comment #2 from Tanu Kaskinen <tanuk at iki.fi> 2012-04-22 10:05:59 PDT ---
(In reply to comment #0)
> The iO4 USB sound card from Alesis can be set to have two stereo output and two
> stereo input channels.

What do you mean by "can"? Since Pulseaudio doesn't seem to detect any stereo
modes as being supported, it looks like the hardware (or at least the driver)
doesn't support anything else than opening the card in the 4-channel mode.

It's true that Pulseaudio could do the necessary magic to offer the user two
stereo outputs and inputs. For output that's possible with some manual
configuration file editing, but it could be more user-friendly (and support
also input). If there's no feature request about that yet in the bugzilla, feel
free to file another bug if you want.

The main point of your bug report seems to be that Pulseaudio fails to use the
input side of the card at all. If it's because of the 4-channel requirement
(which is likely), then this bug is a duplicate of bug 45813. That bug contains
a patch that needs testing - could you try it out?

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