In the processBlock function you say "We want the audio output to be exactly the same as the input!" To ensure this and let the client know that their audio buffer will not be changed, the input to the function should be 'const juce::AudioSampleBuffer&'
In the processBlock function you say "We want the audio output to be exactly the same as the input!" To ensure this and let the client know that their audio buffer will not be changed, the input to the function should be 'const juce::AudioSampleBuffer&'