Simple(st) pitch shift with interpolator?

[rory]

Not sure if this will help, but I came across this post yesterday which uses the LagrangeInterpolator
for resampling:

Resampling whole buffer vs small blocks

I have a situation where I’m streaming audio from one plugin to another which is in a different sample rate. If I wait for the whole sample to be sent and then I convert the buffer to the receivers sample rate, this works great and there are no issues. However, I’d like for the receiver to be able to listen as the sample comes in. I’m sending “chunks” of the buffer at a time, so we’re resampling each chunk as it comes in and appending to the final buffer… … and it doesn’t “quite” work, there’s…