Thats a nice looking enclosure. I don't think there is an audio design tool to do speed or reverse playback.
I think you could read the wav file and manipulate the data however you need to to and use the queue tool from the audio design system...
Is it possible in ANY way for successfully compiled code to cause a failed upload like you are saying? I don't think so.
Is it possible running code could cause an electronic issue say pulling a supply low and cause uploads to fail? I think so...