good evening,
Yes, I tried AudaCity and an AVS Audio Converter but I can't get it to work or it's really too slow or I get a result identical to the original real length. I spent several hours on it.
So, if you have some skills on one or the other software, I send you the MP3 and if possible slow it down in two different speeds to see now which I believe that the recording is at 202, tempo of ue waltz musette prestissimo and that it would be advisable to pass to 120, 168 even 184. For some measures, 202 suits me but the difficult passages I need a slower tempo.
You will tell me! Thank you for answering my message.
Best wishes to you!