Problem with the Vocoder effect

[JRF]

It's hard for me to tell, bu I think the High and Low Pass things do work. If there's a problem with either, it's the high Pass- there's diffference to the original sound, but it doesn't sound especially high pitched. The Low Pass doessound low-pitched though, I think

[steve]

If you're listening through laptop speakers then you may not hear much difference with the High Pass filter as little laptop speakers do not play bass anyway.

Try this as an experiment (restart Audacity so that most of the settings will be at their defaults)
1) Import a music track
2) If the music track is a stereo track, select "Stereo Track to Mono" from the Tracks menu.
3) Trim the track down to about 10 seconds (that will be plenty for this test).
4) Tracks menu > Add New > Audio Track
5) Generate menu > Noise > Pink Noise
6) Click on the name of the upper track and from the drop down menu select "Make Stereo Track"
7) Select a few seconds of the track where you can see both the music in the upper track and the noise in the lower track
8) Apply the Vocoder effect (default settings).
9) When the processing is complete, play it.

You should hear some pretty weird sound.