On 2011-01-06 11:30, Colin Guthrie wrote:
Hi Alban,
'Twas brillig, and Alban Browaeys at 06/01/11 00:32 did gyre and gimble:
From 853a4d96bf2624ef30f86cf4819382949d039c87 Mon Sep 17 00:00:00 2001
From: Alban Browaeys<pra...@yahoo.com>
Date: Wed, 5 Jan 2011 17:13:04 +0100
Subject: [PATCH] Implement Fortemedia SMA processing.
Those small array microphones returns two channels of opposite
phase thus the default remap in pulseaudio doing the sum output
silence.
Many thanks for this patch, it's very interesting, especially as I've
been helping a couple folk with mics that appear to be 180 deg OOP
recently (although this could be an unrelated issue, see:
https://qa.mandriva.com/show_bug.cgi?id=55930 and
http://blog.moncef-mechri.com/?p=124 to see if you think this is a
similar issue)
Can you explain how to use the module and what users need to do to make
it work?
Many thanks.
Col
FWIW, I think you can solve this on the ALSA level using something like:
pcm.micphasefixed { # or your favourite name
type route
slave.pcm "cards.pcm.default" # might have to change this as well
ttable.0.0 1
ttable.1.1 -1
}
That's for your .asoundrc. Then we have to route that into pulseaudio
somehow as well, preferably in a way that just works for the affected
units, via udev/alsa rules or something...don't know the details right
now, but I might figure them out some day. (I e these units are not that
common, so it might be quite far down on my TODO list - it'll go faster
if someone else helps out.)
--
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic
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