I am working on an ambisonics project where I am trying to time stretch a B-format recording so that it will occur over less time without affecting the pitch.
My latest attempts have involved trying to use phase vocoders to perform the time stretching. I have tried a number of platforms for this including Logic 8, Audacity, Matlab and some command line programs. All of these seem to destroy the spatial aspects of the sound i.e. a sound that very obviously travels left to right in the recording is now completely ambiguous. Also the analysis/resynthesis is such that it sounds very processed.
I was wondering if anyone had any recommendations for resources or had any past experience in this? If there are any other software platforms or code out there I would be more than happy to explore those possibilities also, the more options the better!
Thanks in advance!