How to convert a mono reverb into stereo

Audio Plugins
1

Hello, I am new to JUCE and created a reverb following a tutorial, however it is in mono, is it possible to change this to stereo, is this the correct page in PluginProcessor to change this?

    // This is the place where you check if the layout is supported.
    // In this template code we only support mono or stereo.
    if (layouts.getMainOutputChannelSet() != AudioChannelSet::mono()
     && layouts.getMainOutputChannelSet() != AudioChannelSet::stereo())
        return false;

    // This checks if the input layout matches the output layout
   #if ! JucePlugin_IsSynth
    if (layouts.getMainOutputChannelSet() != layouts.getMainInputChannelSet())
        return false;
   #endif

    return true;
  #endif
}
#endif
2

If you are wanting it to support 2 channels that can be done in the pro jucer, settings channel configurations {2,2}

If it is only outputting one channel you need to specify 2 channels in prepareForPlay, when setting the size of the reverb.

Then process two channels. In the process block.

Hope that helps.

3

Thanks for getting back, is that

prepareToPlay

Also here is my processblock

void AlgoReverbAudioProcessor::processBlock (AudioBuffer<float>& buffer, MidiBuffer& midiMessages)
{
    ScopedNoDenormals noDenormals;
    auto totalNumInputChannels  = getTotalNumInputChannels();
    auto totalNumOutputChannels = getTotalNumOutputChannels();


    for (auto i = totalNumInputChannels; i < totalNumOutputChannels; ++i)
        buffer.clear (i, 0, buffer.getNumSamples());

    predelay.setFs(0.0f);
    predelay.setSpeed(0.0f);
    
    float predelaySec = predelayMS * 0.001;
    float predelaySamples = predelaySec * Fs;
    predelay.setDelaySamples(predelaySamples);
    schroeder.setFeedbackGain(timeValue);
    schroeder.setDiffusionGain(diffusionValue);
    schroeder.setDepth(modValue);
    lpf.setFrequency(freqValue);
    
    for (int channel = 0; channel < totalNumInputChannels; ++channel)
    {
        for (int n = 0 ; n < buffer.getNumSamples(); ++n){
         float x = buffer.getWritePointer (channel)[n];
        
            float verb = predelay.processSample (x, channel);

            verb = schroeder.processSample (verb,channel);
            
            verb = lpf.processSample(verb, channel);
            
            float y = (1.f-wet) * x + wet * verb;
            
            buffer.getWritePointer(channel)[n] = y;
        }
    }
}
4

Either the prepareToPlay, has set the channels to 1.

Or your processSample has the arguments flipped, I thought it went (channel, sample). Other than that the block looks fine.

After that, I would assume some variable in the reverb is got mixed up. Maybe test the filter, then depth at 0 then 1, to determine if it’s input or output.

What is in your prepareToPlay? I learned in rackAfx and they used prepareForPlay, unfortunately my code always alternates the two functions when I make a new class. :joy: