envelope is killed after the next change

Audacity Help Forum GNU/Linux
1

I do envelope, and then amplify, or change speed ,… and then sometimes (maybe always),

envelope is erased. This doens’t make any sense.

…

Sometimes I do a tiny aount of bass boost and volume of the piece increases 10 fold. Why so?

Similar things happend wit amplify. I try to drop volume by 10 percent. It drops by 50 percent.
I increase volue by 10 (percent?) it increases 3 fold. Or somthing like this.

2

“Nyquist effects” have a limitation, that they can’t see envelopes, and just ignore them. The processed sound is returned to the track without an envelope.
A few other effects have the same problem.

This is listed as a known bug in the release notes:

Effects and Analysis

  • The following effects ‘’‘remove envelope control points’‘’:
  • Change Speed/Pitch/Tempo; Equalization; Graphic EQ; Filter Curve; Noise Removal; Sliding Time Scale/Pitch Shift; any Nyquist effect in the Effect menu.
    • The Reverse effect retains the control points, but does not move (reverse) them.
3

You can “mix and render” (a copy of) the track before you apply changes that would kill the envelope.