Re: Default ChannelLayout's
Re: Default ChannelLayout's
- Subject: Re: Default ChannelLayout's
- From: Derk-Jan Hartman <email@hidden>
- Date: Fri, 3 Jun 2005 21:25:47 +0200
A bit off topic here, but this all feels so error-prone for the
'simple' user. Why doesn't the Audio PrefPane present me with a warning
and a "setup your speakers" dialog when I haven't done so before?
It would avoid a hell of a lot of trouble if you ask me.
DJ
On 03 jun 2005, at 15:57, B.J. Buchalter wrote:
on 6/3/05 2:44 AM, Derk-Jan Hartman at email@hidden
wrote:
Now it seems that as far as i can tell ALL setups do not know this
themselves. You need to explicitly set this in Audio Midi Setup Util.
Even worse it seems that even if it shows correctly in Audio Midi
Setup
util, you need to explicitly CHANGE, apply, change BACK and again
apply
to get this set.
This definitely appears to be a bit buggy. You should file a bug about
the
AMS UI not taking the changes without switching back and forth (I kinda
noticed this as well).
IMHO, if there is no ChannelLayout defined when you query it, you
should
assume that the device should be treated as stereo, with the L and R
channels on output channels 1 and 2. This is what QT did up until QT7
and we
never had any support questions about it (if people wanted to listen in
surround, they went and set the Channel Layout).
At QT7, the behavior seems to have changed, and QT7 seems to make some
assumptions about the channel layout based upon the number of available
channels, if the AMS channel layout has not been set. This has caused a
number of customers to call for support, because QT was playing mono
signals
out Channel 3 (the assumed center channel).
Users expect the multichannel devices to work as stand-ins for stero
devices
unless they explicitly configure things for multichannel/surround
operation.
Perhaps if you detect a multichannel device with no channel layout,
you can
put up a message telling the user that if they want surround output
they
should go and set up the speaker layout in AMS.
Best regards,
B.J. Buchalter
Metric Halo
5 Donovan Drive
Hopewell Junction, NY 12533 USA
tel +1 845 223-6112
fax +1 603 250-2451
---
Universiteit Twente
Derk-Jan Hartman (d.hartman at student.utwente dot nl)
http://www.sidequest.org
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