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Re: kAudioUnitProperty_BypassEffect
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Re: kAudioUnitProperty_BypassEffect


  • Subject: Re: kAudioUnitProperty_BypassEffect
  • From: Brian Willoughby <email@hidden>
  • Date: Tue, 21 Dec 2010 03:42:39 -0800

I just now came across a case where I would hope for the opposite recommendation.

If a software synthesizer happened to be a real CPU hog, but a user still wanted to instantiate it in a Logic Song, then it might be helpful to be able to use Bypass to turn off the music device's internal rendering during Logic's habit of keeping the currently- selected track rendering for live MIDI input.

I suppose this is really an edge case, since it involves an underpowered machine and/or a CPU hog music device in combination with Logic's live MIDI rendering, but it still seems to me like it would be a bad idea to preclude Bypass just because an AU is aumd.

I also realize that it has been almost two years since this unofficial recommendation was made. Has anything been formalized in the interim? Any updated recommendation? Note that the above aumd is not hypothetical, nor is the user case of wanting to spare the CPU some of the time when using the AU in Logic.

Brian Willoughby
Sound Consulting


On Feb 10, 2009, at 15:39, William Stewart wrote:
So, Robert and I have been talking about this offline.

His audio unit is an instrument (type aumd - music device)

We don't normally implement bypass for instruments, it is generally considered a property for processing rather than generating audio, and it would appear that Digital Performer is behaving strangely when seeing instruments with this property implemented. As I also dont' know of any other instruments that implement this property either; all in all it seems better for him to remove this feature from his AU.

For effects though, we would still like and expect to see the property supported

Bill

On Feb 9, 2009, at 7:03 PM, William Stewart wrote:
Why?

On Feb 9, 2009, at 3:18 PM, Robert Fehse wrote:
it seems that no major host is using this property. (Logic,AULab,Live,Kore)
Only Digital Performer (6.0.1) is calling it on startup and bypasses me
forever.
Is there any host using this property or can i safly remove it ?

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