Re: More Master Mute info
Re: More Master Mute info
- Subject: Re: More Master Mute info
- From: Andy Peters <email@hidden>
- Date: Mon, 9 Feb 2009 14:28:35 -0700
On Feb 9, 2009, at 2:20 PM, Gordon Rankin wrote:
Jeff,
From: Jeff Moore <email@hidden>
Subject: Re: System Mute Problem
To: CoreAudio API <email@hidden>
Message-ID: <email@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Does this device work properly with Audio MIDI Setup (in /
Applications/ Utilities) and/or HALLab (in /Developer/Applications/
Audio)?
Here's is what I am doing...iTunes output out the dac to powered
speakers.
If I set the Mute check box in either the Sytem Preferences or Audio
Midi it only mutes the Left speaker.
Otherwise this product works fine in all regards.
Again the Mute is listed as the Master Channel and the volume is
Right & Left front as it should be for stereo.
What I don't understand is why OSX is Muting as a function of
volume. If it sees the Master Channel Mute it should use that for
Mute and not set the Mute as a function of Volume = MIN as it seems
to be doing for the Left channel. Then if you uncheck the mute it
resets the Left channel equal to the previous on setting.
I am going to post that on the USB list as well as I get that also.
My understanding of these Audio Controls is that they should NOT be
handled by the OS at all ... they are passed down to the device over
the control pipe, and the device has to handle them in an appropriate
manner.
-- a
---------------------------------------
Andy Peters
Electronics Engineer
5511 E Rosewood St
Tucson, AZ 85711
(520) 907-2262
email@hidden
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