Solution: Install a media player that supports playback speed control. On VLC, tap the speed icon (1.00x) and drag down to 0.75x or 0.50x. On Spotify (if you uploaded as local files), go to the Now Playing view → Speed icon → choose slower.
Now that your audio is installed, don't just listen passively. Use the "Three-Step Method": Solution: Install a media player that supports playback
You don’t need a computer for this final step. Solution: Install a media player that supports playback