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Re: Multichannel AudioUnits
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Re: Multichannel AudioUnits


  • Subject: Re: Multichannel AudioUnits
  • From: Jim Credland <email@hidden>
  • Date: Fri, 18 Sep 2015 19:28:50 +0100

Cheers Paul - I'm trying to report a maximum of 2 stereo outputs.  The problem is I'm somehow offering 16 :)

I'll put a debugger on in a few carefully chosen places and see if I can't figure out what's happening.

On 18 Sep 2015, at 19:27, Paul Davis <email@hidden> wrote:

> On Fri, Sep 18, 2015 at 2:15 PM, Jim Credland <email@hidden> wrote:
>> (With great pain) I've discovered how to get and AudioUnit synth with multiple outputs working.
>>
>> It works, but it's showing up with 16 output busses in both Logic and Ableton.
>>
>> I think I'm making all the right moves.  AUVAL reports as follows:
>>
>> --------------------------------------------------
>> VERIFYING DEFAULT SCOPE FORMATS:
>> Input Scope Bus Configuration:
>> Default Bus Count:0
>>
>> Output Scope Bus Configuration:
>> Default Bus Count:2
>>    Format Bus 0: AudioStreamBasicDescription:  2 ch,  44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
>>    Format Bus 1: AudioStreamBasicDescription:  2 ch,  44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved
>> --------------------------------------------------
>>
>> Anyone suggestions as to which part of the undocumented maze of AudioUnit I should be looking in?  I'd rather like the hosts to only report a sensible number of busses.
>
> as a host author, i can tell you that this is both host-dependent and
> hard to get right.
>
> we have users who want the maximum number of outputs and others who want stereo.
>
> if the plugin reports being able to do both, it isn't clear what the
> host should do ...


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  • Follow-Ups:
    • Re: Multichannel AudioUnits
      • From: Jim Credland <email@hidden>
References: 
 >Multichannel AudioUnits (From: Jim Credland <email@hidden>)
 >Re: Multichannel AudioUnits (From: Paul Davis <email@hidden>)

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