Sound artifacts on long tracks

[paulcarroty]

It sounds like "aaaaaaaaaooooooooeeeeeeee" on tracks longer than 5 or 10 minutes.

Tested on 6.0.0.

[noirtier-villefort]

Do you avoid 7200 symbols limit?

[paulcarroty]

Tested on https://brehunets.com and my instance, so it's probably not related to the limit.