Re: StereoMixer
Re: StereoMixer
- Subject: Re: StereoMixer
- From: Lieven Dekeyser <email@hidden>
- Date: Wed, 18 Jun 2003 14:05:10 +0200
Robert Grant wrote:
Dunno about the interleaved streams issue but panning stereo sources
is not supported by the Mixer. This is because there's some debate
about whether you can actually "pan" a stereo source.
What most of us would be happy with is for it to work like a balance
control but it doesn't.
There was a lot of discussion about this a while back (search the
archives) and I remember Bill making some hints about upcoming
things... to be revealed at WWDC perhaps? Maybe I'm just rumor
mungering? :-)
I have no intention to start the discussion again because it looks like
the coreaudio team is allready working on it.
But I guess the solution will be Panther-only, right? Using it would
involve requiring Panther for my applications, which is not really an
option since I guess I'll be running Jaguar myself for some time to
come (lack of money/powerful mac.. anybody got a job for a
soon-to-be-majoring computer science student? :) )
So I'm looking for a stereo-"panning" solution that works in Jaguar...
has anybody written an AudioUnit that does this?
other ideas?
--Lieven
On Tuesday, June 17, 2003, at 12:21 PM, Lieven Dekeyser wrote:
Hey!
It's been a while since I last used CoreAudio and posted here. Since
then the AudioUnit v2 specification got out and now I'm trying to
catch up a bit..
I've converted the PlaySoundFileBuffered example from Kurt Revis to
use the v2 RenderCallback. I also made it possible to connect to
other AudioUnits than the DefaultOutputUnit. This is when I first ran
into trouble: apparently the StereoMixer doesn't support interleaved
streams, so I had to connect an extra ConverterUnit. Is there any
particular reason for this?
A second problem I'm having is that the pan parameter doesn't seem to
work:
AudioUnitSetParameter(myMixer, kStereoMixerParam_Pan,
kAudioUnitScope_Input, 0, 1.0f, 0);
doesn't do a thing.. it doesn't even return an error.. any ideas why?
thanks,
--Lieven
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