Use of amplification effect mutes the sound clip

Hi,

I'm experiencing a bug I already had in 0.7.5, but was solved in 0.8. Now in 0.8.2, it's back... :-(

When I use either the "Amplification" or "Volume", and set a value If I set the value to something >=100%, the sound is played.

I guess the "Volume" effect is only a keyframe generator for the "Amplification" effect, so it's the same bug in both effects.

If anyone has a solution or a workaround, I would greatly appreciate it.