Multi Outs working everywhere except Cubase [Solved]

I thought I had finally managed to make multiple output buses work properly, and it does work in most major DAWs I’ve tested: Reason, Live, Reaper, Pro Tools., Bitwig and Logic Pro. They all behave as I would expect.

But Cubase says that my plugin only supports stereo.

Here’s the code that I added to my AudioProcessor:

    : AudioProcessor(BusesProperties()
        .withInput("Main Input", AudioChannelSet::stereo(), false)
        .withOutput("Main", AudioChannelSet::stereo(), true)
        .withOutput("Bus 1", AudioChannelSet::stereo(), true)
        .withOutput("Bus 2", AudioChannelSet::stereo(), true)
        .withOutput("Bus 3", AudioChannelSet::stereo(), true)
        .withOutput("Bus 4", AudioChannelSet::stereo(), true)
        .withOutput("Bus 5", AudioChannelSet::stereo(), true)
        .withOutput("Bus 6", AudioChannelSet::stereo(), true))

bool MyAudioProcessor::isBusesLayoutSupported(const BusesLayout &layout) const
    if (layout.getMainOutputChannelSet() == AudioChannelSet::disabled()) {
        return false;
    if (layout.getMainOutputChannelSet() != AudioChannelSet::stereo()) {
        return false;
    if (layout.inputBuses.size() > 1) {
        return false;
    int numActiveOutputBuses = 0;
    for (auto bus : layout.outputBuses) {
        if (bus != AudioChannelSet::stereo() && (! bus.isDisabled())) {
            return false;
        if (! bus.isDisabled()) {
    return numActiveOutputBuses >= 1 && numActiveOutputBuses <= 7;

Any obvious mistakes that would make this not work as expected in Cubase?

Nevermind, the problem was that I apparently don’t know how to use Cubase. :rofl:

The above code seems to be doing the job fine after all.

I know its been a while but I was wondering if this definitely works on Logic - and what it displays?

I’ve literally copy-pasted ur code at this point and Reaper/Ableton both work fine, but Logic still says Stereo, Multi Output (16xStereo) and Multi Output (25xStereo)…

Is there anything else outside of the PluginProcessor that you’ve done? Like in the cmake or whatever?