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Re: Host or Plugin problem?

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Re: Host or Plugin problem?

Subject: Re: Host or Plugin problem?
From: William Stewart <email@hidden>
Date: Fri, 12 Aug 2005 11:45:51 -0700


On 12/08/2005, at 8:42 AM, Jeremy Sagan wrote:

Hello,
I have a problem with a specific plug-in that passes auval. It is a music device that does not support kAudioUnitProperty_SupportedNumChannels.

The semantic then is that the AU's default configuration is the only configuration it supports - both num channels and num I/O elements. There is *no* qualification to this statement for 'aumd' types - AU Instruments. As a host you can detect this and limit the configuration actions you then apply to an AU Instrument of this nature.

My understanding was that therefore it may or may not be able to take arbitrary in and out configurations, thus I try to configure it to 0 in and 8 out for my particular application. Using kAudioUnitProperty_StreamFormat to set its format to 0,8 the audiounit returns with no error. AudioUnitInitialize similarly returns with no error. However when asked to render, the plug-in returns kAudioUnitErr_FormatNotSupported. I am fairly certain that 0,8 is not a supported configuration. Should not the plug-in be returning an error earlier in either kAudioUnitProperty_StreamFormat or AudioUnitInitialize?

Yes - if you can let me know privately some more details, I can add a test to auval to detect this problem

Thanks

Bill


Thanks,

Jeremy
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  >Host or Plugin problem? (From: Jeremy Sagan <email@hidden>)




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