AU fails logic AU validation test, but VST works fine

Audio Plugins
1

My plugin builds sucessfully and when the VST is loaded in reaper it works fine. However the AU fails the AU Validation Test.

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Is the error I get. I’m not very confident with debugging (or coding to be honest) but I had a look at the audioSampleBuffer.h file and the part that fails is this

Type* getWritePointer (int channelNumber) noexcept
        {
            jassert (isPositiveAndBelow (channelNumber, numChannels));
            isClear = false;
            return channels[channelNumber];
        }

Could anyone help me out with this or point me in the right direction for how to try and fix this? Sorry if it’s somewhat vague.

2

Just run auval in your debugger, so when it hits the assertion, you can debug it and see what’s happening.

3

Running auval in Xcode is a bit more complicated than expected.

I couldn’t make it work with auval, I had to use auvaltool.

Copy /usr/bin/auvaltool to /Applications/auvaltool_copy - this means you can select this exe in Xcode’s user interface.

Run auval -a from the command line to find all the AUs. Find yours in the list (eg aufx Mwdd Manu - yourcompany: PluginName)

Set up your Xcode debugging scheme, set executable to /Applications/auvaltool_copy, set arguments to -v aufx Mwdd Manu and you’re good to go.

2 Likes
4

From the auval output, it sounds like you are expecting a stereo signal in your rendering code, and haven’t considered that it could also be just a single mono channel.