I’m using Audacity 2.3.2. I need to do speech analysis. I imported a sound track, but in order to analyse the waves with regards to specific sounds, I have to slow it down a lot. I did that using the tempo change since I didn’t want to change the pitch. Then I labeled the waveform. But now I can’t get back to the original speed. Even though I change the tempo back to zero percent change, it does not change. And even if it does go faster, the distortion stays. I don’t know if anyone can help. Maybe there is a different way to slow it down so one can label the sounds. The original speech is quite fast so it needs to slow down a lot so one can hear where each sound is pronounced so relate it to the wave. Hope this makes sense.
If you enable the “High quality stretching” option, then slowing down by -50% (half speed) followed by speeding up by 100% (double speed) creates only a relatively small reduction in sound quality.