ResamplingAudioSource is used by many core components of JUCE, such as AudioTransportSource and Convolution.
Given its importance within JUCE, I was surprised to see it uses linear interpolation.
Others suggested alternative methods in 2012, but none have been added so far.
It would be great to use the new Interpolators like WindowedSincInterpolator for good quality resampling.
Oboe, a library within JUCE made by Google, uses linear interpolation as a last resort.
For this reason it’s a shame JUCE offers no other options.