Audio distortion

[Alberto]

If I put in a second video track (without audio), when it overlays the first video track with audio, the audio is altered.

alteración de audio
Si pongo una segunda pista de video (sin audio), cuando
pasa sobre la primera pista de video con audio, se altera el audio

[shotcut]

Do you hear the distortion when you play the export result in a media player? Some audio distortion is not unexpected when you preview.