Unwanted noise from Reverb (offline only)
Unwanted noise from Reverb (offline only)
- Subject: Unwanted noise from Reverb (offline only)
- From: Jeremy Sagan <email@hidden>
- Date: Sat, 29 Mar 2003 23:53:21 -0500
Now I have tried this on a dual G4 1.2 Ghz running 10.2.4 and it is
even more noisy. The noise sounds a lot like a helicopter and happens
even when the reverb is run alone so I think it has nothing to do with
the Apple:DLS Music device other than the Apple:DLS Music device uses
the Apple:Matrix Reverb internally.
Is it possible that the reverb is picky about which thread it is called
from? It seems like it works fine when called from the Core Audio I/O
thread but does not like being called from the main application thread.
Do I need to initialize the audiounit from the thread that
audiounitrender is called from?
Thanks,
Jeremy
On Saturday, March 29, 2003, at 06:39 PM, Jeremy Sagan wrote:
10.2.3 powerbook g4 titanium 667 mhz
I am running into (and some users) a problem where the DLS plug-in
works fine when the audio device is running but if I want to mix the
output of the DLS plug-in to create an audio file, the reverb portion
of the DLS/SF2 synth produces weird low-level noises that are most
certainly unwanted. If I turn the reverb down in the DLS edit window
and connect a 3rd party reverb everything works fine. During the mix,
no core audio devices are running in my app.
When I call 'AudioUnitRender' to produce the audio I am supplying only
a valid sample time (I do not think that should matter).
theTime.mFlags = kAudioTimeStampSampleTimeValid;
Does anyone know what could cause these sounds?
Thanks,
Jeremy
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