This is a program for extreme sound stretching (like 50x) and for applying...
[ О приложении ]

It can transform any sound/music to a texture.
Please note that this is suitable only for extreme time stretching (e.g.
if have a melody of 3 minutes and you want to listen it in 3 hours).
If you want "less extreme" time stretching, you can use a program which contains the SoundTouch library.

Features:

• It produces high quality extreme sound stretching.
While most sound stretching software sounds bad when trying to stretch the sounds a lot, this one is optimized for extreme sound stretching.
So, the stretch amount is unlimited.
• You can play the stretched sound in real-time (including the possibility to "freeze" the sound) or you can render the whole sound or a part of it to audio files.
• It has many post-processing effects, like: filters, pitch/frequency shifters.
• Support for WAV, OGG VORBIS files and MP3 files.
• It is a Free Software.

Источник
Репозиторий: flathub

FlatPak: paulstretch [Audio & Video]