Thank you. I was aware that changing a .wma to .wav wouldn't restore the signal to its original uncompressed pristine state. Many (many) years ago I could probably have heard the difference, but advancing years and some tinnitus now make it impossible.

As far as any speed gain is concerned, I realise it is likely to be fairly marginal, but it appeals to my impatient nature to know that it is now as fast as it can be!