FR : Constructor/method to create an AudioBlock from AudioSourceChannelInfo

It sometimes comes up that the DSP module classes and their process() methods need to be used in an AudioSource context. While that’s already possible, the constructor call to make an AudioBlock<float> out of the AudioSourceChannelInfo is quite unwieldy and it might not be obvious for newcomers which constructor of AudioBlock needs to be used and with what parameters.

It would be quite useful if AudioBlock had a constructor or a static method that would make an AudioBlock<float> from an AudioSourceChannelInfo.