Plugin mono on cubase

Audio Plugins
1

Hello,
It’s weird, my plugin outputs only mono audio on Cubase 9. I have the following in my AudioProcessor

bool NebulaAudioProcessor::isBusesLayoutSupported (const BusesLayout& layouts) const
{
    // Only mono/stereo and input/output must have same layout
    const AudioChannelSet& mainInput  = layouts.getMainInputChannelSet();
    const AudioChannelSet& mainOutput = layouts.getMainOutputChannelSet();
    
    // input and output layout must be the same
    if (mainInput != mainOutput) return false;
    
    // do not allow disabling the main buses
    if (mainInput.isDisabled()) return false;
    
    // only allow stereo
    if (mainInput.size() != 2) return false;
    
    return true;
}

Debugging the code, the same pointer is pushed into each channel of the incoming buffer, so that even though it says there’s 2 channels actually the output is mono as both the channels are the same.

This only happens with cubase.

Any ideas?

2

Are you on the develop branch? I think you may be hitting a bug that is still on the master branch.

3

Thanks for the reply.
I’m on the master. I guess it’s time to jump to dev then! Sorry I should have tried it before bothering you.

4

Hmm, no that didn’t fix it. What was the bug?

5

@fabian Sorry to poke, I know you’re busy. I tried updated to the tip of the dev branch but it didn’t solve the problem. What was the bug that was fixed in the dev branch? I tried digging through the commits but I got a bit lost since they aren’t tied to issues.
I’m a bit stuck with this and people are getting a bit miffed.
Thanks

6

Are you using BusProperties?

: AudioProcessor (
    BusesProperties()
        .withInput ("Input", AudioChannelSet::stereo())
        .withOutput ("Output", AudioChannelSet::stereo())
    )

?

1 Like
7

Yeah I tried that. Do I need both that and isBusesLayoutSupported? Has anyone had this problem?

8

Do you also see this problem in the “audio plugin demo”? The “audio plugin demo” has the exact same bus layouts as your plugin.

9

Getting the latest, latest JUCE fixed it! Thanks.