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Re: Monitoring input level

Sigh.  I think I'm going insane.

I've just pretty much copied what SimplePlayThru does - for a single HAL.
I've verified that SimplePlayThru works with my Edirol - and I've carefully crawled through the code, checking that mine is the same. Line by line, as far as I can tell, I'm making the same calls, in the same order. checkErr() never returns anything, so I assume my graph and it's connections are being made OK.

My entire code is now reduced to:

	ComponentDescription desc;
	desc.componentType = kAudioUnitType_Output;
	desc.componentSubType = kAudioUnitSubType_HALOutput;
	desc.componentManufacturer = kAudioUnitManufacturer_Apple;
	desc.componentFlags = 0;
	desc.componentFlagsMask = 0;
	
	OSStatus err;
	err = NewAUGraph(&auGraph);
	checkErr(err);

err = AUGraphNewNode(auGraph, &desc, 0, NULL, &inputNode);
checkErr(err);
err = AUGraphConnectNodeInput(auGraph, inputNode, 1, inputNode, 0);
checkErr(err);
err = AUGraphOpen(auGraph);
checkErr(err);
err = AUGraphGetNodeInfo(auGraph, inputNode, NULL, NULL, NULL, &inputUnit);
checkErr(err);

UInt32 enableIO = 1;
err = AudioUnitSetProperty(inputUnit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Input,
1, // input element
&enableIO,
sizeof(enableIO));
checkErr(err);

enableIO = 0;
err = AudioUnitSetProperty(inputUnit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Output,
0, //output element
&enableIO,
sizeof(enableIO));
checkErr(err);

err = AUGraphInitialize(auGraph);
checkErr(err);

err = AUGraphStart(auGraph);
checkErr(err);

NSLog(@"Monitoring from %@ to %@", [self deviceNameIn], [self deviceNameOut]);
NSLog(@"Is valid? %d - isrunnning? %d", [self isValid], [self isRunning]);

---------------------------------------------------------------

The output of which is:
2006-06-22 19:07:13.191 AudioLevelMonitor[4406] Selected: -1, (null)
2006-06-22 19:07:13.450 AudioLevelMonitor[4406] Monitoring from EDIROL UA-25 44.1kHz to EDIROL UA-25 44.1kHz
2006-06-22 19:07:13.451 AudioLevelMonitor[4406] Is valid? 1 - isrunnning? 1

Yet ... still nothing!

Can anyone spot what I'm doing wrong?

Neil
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References: 
 >Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: Jeff Moore <email@hidden>)
 >Re: Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: Doug Wyatt <email@hidden>)
 >Re: Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: William Stewart <email@hidden>)
 >Re: Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: Jeff Moore <email@hidden>)
 >Re: Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: Jeff Moore <email@hidden>)
 >Re: Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: Jeff Moore <email@hidden>)
 >Re: Monitoring input level (From: Neil Clayton <email@hidden>)
 >Re: Monitoring input level (From: Jeff Moore <email@hidden>)



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