Re: kMusicDeviceProperty_InstrumentCount
Re: kMusicDeviceProperty_InstrumentCount
- Subject: Re: kMusicDeviceProperty_InstrumentCount
- From: Jeremy Sagan <email@hidden>
- Date: Thu, 30 Oct 2003 14:06:03 -0500
On Thursday, October 30, 2003, at 09:50 AM, Craig Bakalian wrote:
Hi,
I know this code isn't working. I am getting a -50 on there err. I
am sure this type of question has been answered before but, how does
one get the instrument count of Apple's DLSSynth?
ComponentDescription synth;
synth.componentFlags = 0;
synth.componentFlagsMask = 0;
synth.componentType = kAudioUnitType_MusicDevice;
synth.componentSubType = kAudioUnitSubType_DLSSynth;
synth.componentManufacturer = kAudioUnitManufacturer_Apple;
AUNode synthNode;
AUGraphNewNode(graph, &synth, 0, NULL, &synthNode);
the above is popped first into a AUGraph called graph.
I am using this code to get the instrument count with a -50.
-(NSArray *)instrumentArray
{
AUNode synthNode;
AudioUnit theSynth;
UInt32 count =0;
UInt32 size = 0;
Just a hunch but your size parameter looks like it is 0. There is not
much data you can put into count if the size of count is zero.
Jeremy
OSStatus err;
AUGraphGetIndNode(graph, 0, &synthNode);
err = AUGraphGetNodeInfo(graph, synthNode, NULL, NULL, NULL,
&theSynth);
err = AudioUnitGetProperty(theSynth,
kMusicDeviceProperty_InstrumentCount, kAudioUnitScope_Output, 2,
&count, &size);
NSLog(@"%d", err);
return blahblah...
}
Craig Bakalian
www.eThinkingCap.com
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