Cockos Incorporated Forums - View Single Post - Custom string displays for AU parameters are not used

reuk · 06-21-2021, 05:55 AM

I work on the JUCE plugin framework. Some of our users reported an issue where JUCE AU plugins display incorrect parameter values in the generic plugin UI and automation lane.

The original issue report is here, but I'll give a quick summary below.

Parameters in JUCE AU plugins are marked with the `kAudioUnitParameterFlag_ValuesHaveStrings` flag. According to the AudioUnitProperties header, the host should use the ParameterStringFromValue and ParameterValueFromString properties to translate values of all parameters marked with this flag. However, if I debug a JUCE plugin in REAPER, the host never tries to retrieve the StringFromValue property or property info. Other hosts (I tested Ableton Live) do seem to use the StringFromValue property as expected, so I think the issue is in REAPER rather than in JUCE's AU wrapper.

Please let me know if you require any further information, plugins for testing, etc.

Thanks!

06-21-2021, 05:55 AM
reuk Human being with feelings Join Date: Jan 2021 Posts: 10	Custom string displays for AU parameters are not used I work on the JUCE plugin framework. Some of our users reported an issue where JUCE AU plugins display incorrect parameter values in the generic plugin UI and automation lane. The original issue report is here, but I'll give a quick summary below. Parameters in JUCE AU plugins are marked with the `kAudioUnitParameterFlag_ValuesHaveStrings` flag. According to the AudioUnitProperties header, the host should use the ParameterStringFromValue and ParameterValueFromString properties to translate values of all parameters marked with this flag. However, if I debug a JUCE plugin in REAPER, the host never tries to retrieve the StringFromValue property or property info. Other hosts (I tested Ableton Live) do seem to use the StringFromValue property as expected, so I think the issue is in REAPER rather than in JUCE's AU wrapper. Please let me know if you require any further information, plugins for testing, etc. Thanks!