Re: DLSMusicDevice and reverb
Re: DLSMusicDevice and reverb
- Subject: Re: DLSMusicDevice and reverb
- From: William Stewart <email@hidden>
- Date: Mon, 20 Nov 2006 11:32:22 -0800
On 18/11/2006, at 2:52 PM, E. Tejkowski wrote:
I have seen it mentioned that by default the built-in internal
reverb of the DLSMusicSynth is active. I've also seen code in more
than one place that shows how to deactivate it. Why is that when I
omit the line to deactivate the reverb, I not only don't hear
reverb, I hear nothing coming from my DLSSynth? Also, what
parameters does the default reverb have and how I can access them?
Below is some pseudocode showing what I am doing:
err = NewAUGraph
err = AUGraphNewNode(graph, description, 0, 0, synthNode)//dlsSynth
err = AUGraphNewNode(graph, description, 0, 0, outputNode)//output
err = AUGraphConnectNodeInput(graph,synthNode,1,outputNode,0)//
connect dls to output
err = AUGraphUpdate(graph)
err = AUGraphOpen(graph)
err = AUGraphInitialize(graph)
// Turn off the reverb on the synth
err = AUGraphGetNodeInfo (graph, synthNode, 0,0,0, synthUnit)
usesReverb = 0
//THIS NEXT LINE IS THE LINE THAT I OMIT, WHICH GIVES ME SILENCE
err = AudioUnitSetProperty(synthUnit,
kMusicDeviceProperty_UsesInternalReverb, kAudioUnitScope_Global, 0,
usesReverb, 4)
When you turn off the internal reverb on the synth, it will change
the way it outputs data:
Internal Reverb off:
It will output data on the first output element only (el == 0)
Internal Reverb on:
It will output data on both output elements, el==0 will have the
reverb signal (the synth's output that should be taken through the
reverb) and el==1 will have the dry signal
You should change this property with the AU not being initialised -
so you should do this after AUGraphOpen and before AUGraphInitialise
I don't exactly know why you aren't hearing sound - but you have to
have both outputs of the synth active - if you were playing a sound
that was only using the reverb, then there would be no output on
el==1...
Bill
// Start playing
err = AUGraphStart(graph)
Thanks,
Erick
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
--
mailto:email@hidden
tel: +1 408 974 4056
________________________________________________________________________
__
"Much human ingenuity has gone into finding the ultimate Before.
The current state of knowledge can be summarized thus:
In the beginning, there was nothing, which exploded" - Terry Pratchett
________________________________________________________________________
__
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden