Bugzilla – Bug 2036
Mac: Some AU plug-in effects can be enabled but fail to register
Last modified: 2020-04-13 06:20:52 UTC
The following AU effects can be sen in the "New" list in the Manage Plug-ins dialog: AUMixer AUMatrixMixer AUMultiChannelMixer AUMixer3D AUMultiSplitter AUShceduledSoundPlayer AUAudioFilePlayer AUSpeechSynthesis But they fail to register through a series of dialogs - each one of which the user must acknowledge. Occurs on 2.3.0 and the 64-bit 2.3.1 alpha (I have not tested earlier versions)
Further testing shows that this first occurred in 2.2.2 But it looks like for 2.2.1 and earlier these particular AU effects were not shipped with Audacity
(In reply to Peter Sampson from comment #1) "We" don't ship AU effects. Some are shipped with macOS. Others are shipped with other Mac software, and some are available as third party downloads. Some AU effects could require features in the host application that Audacity does not support (as is the case with some VST effects). We should probably note in the manual which "standard" AU plug-ins (ones that are shipped with the operating system) are not supported by Audacity.
(In reply to Steve Daulton from comment #2) >We should probably note in the manual which "standard" AU plug-ins >(ones that are shipped with the operating system) are not supported >by Audacity. But before I do that I would like to know if the set I list is Mojave specific or is the same in earlier macOS versions ------------------------------------------------- >"We" don't ship AU effects. Some are shipped with macOS. >Others are shipped with other Mac software, and some are >available as third party downloads. So why do I see a different (smaller) set available in 2.2.1 and earlier when running on the same Mojave Mac ? :-//
I asked Gale about these plugins quite a while back and he assured me that those 8 not enabling is normal. I don't know why you have a shorter list, but going back to 2.1.2 I still show those 8 that will not enable.
Fixed in: https://github.com/audacity/audacity/commit/35fa6cf None of these plug-ins expose parameters and this wasn't handled properly. BUT... Since they are handled correctly now, they appear in the menu if you enable them. But, Audacity isn't prepared to handle the functions they perform. In theory, the AUAudioPlayer and AUNetReceive could be made to work, but I'm not sure the effort is worth it. Should we just add them to a "blacklist" so they are bypassed in the scan altogether?
(In reply to Leland Lucius from comment #5) Testing on macOS 10.15.3 with Audacity 2.4.0 5900c52 I get no complaint dialogs at step 5 and all available AU effects appear top register and can be properly enabled in the Plug-in Manager. But some in the list in the Steps to reproduce do not work and others are missing (presumably no longer distributed with macOS 10.15.3) 1) These ones register and can be enabled. They appear in the Effect menu, but when you select them nothing happens (other AU effects do work). AUMixer AUMatrixMixer AUMultiChannelMixer AUMixer3D AUMultiSplitter 2) These AU effects are no longer listed as available in the "New" list in Plug-in Manager AUShceduledSoundPlayer AUAudioFilePlayer AUSpeechSynthesis 3) In Comment #4 Leland talks about "AUAudioPlayer and AUNetReceive" - these too appear to be no longer available on 10.15.3 (I can supply a screenshot with my list of AU effects if that helps at all - please advise) So technically this bug as written is fixed as the AU effect can all be registered and enabled - BUT because they don't work I shall REOPEN this for the residual (unless we want that as a new bug?).
Blacklist added for these effects since Audacity doesn't support them: appl/augn/afpl/Apple: AUAudioFilePlayer appl/augn/nrcv/Apple: AUNetReceive appl/augn/sspl/Apple: AUScheduledSoundPlayer appl/augn/ttsp/Apple: AUSpeechSynthesis appl/aumx/3dmx/Apple: AUMixer3D appl/aumx/mspl/Apple: AUMultiSplitter appl/aumx/mxmx/Apple: AUMatrixMixer appl/aumx/smxr/Apple: AUMixer If additional "problematic" effects are found in the future, it's easy to blacklist them. (Though an external "blacklist.txt" file would be even better.)
(In reply to Leland Lucius from comment #7) Testing on macOS 10.15.4 with Audacity 2.4.0 2e5fc67 These problematic effects are no longer shown available on the "New" section of the Plug-in Manager. The blacklist looks to be working properly
