Audacity Forum

Stereotypical robot voice can be obtained using vocoder and/or comb effects ...
You can get a free comb filter plug-in for Audacity about half way down this list.

A "ring modulator" can be used to make the robot sound gritty, (plug-in attached)

The sound activated recording facility may be what you are looking for... audacity preferences, recording, sound activated recording.png The sound (from a radio receiver) would only be recorded when its volume was above a threshold. When the radio volume was below the threshold, e.g. silent (squelch...

Select "Split stereo to mono" to convert your stereo track into two mono ones ...
then delete the unwanted mono track by clicking on the "X" on the top left of that track.

Noise Remover : Acquiring 1 sec quiet section from lead-in for Noise Profile (this is normally general vinyl noise, a low roar with some rumble) Noise Reduction 12db, Smoothing 500Hz, Attack/decay 0.50 secs 2- Are these parameters generally okay? Would you make any changes to them? 3- Would you mak...

The male commentator-style voice ("disco Bobby") is only on the right track.
The quickest solution to get rid of "disco Bobby" is delete the right channel and make a pseudostereo from the left, e.g. ...

Disco Bobby Has left the building.mp3

Could try a Notch filter at the fundamental beep frequency, and some of its harmonics.
Don't get your hopes up though: it probably won't remove the bleep completely and will distort the speech to some extent.

Also vocoder, but I got the impression the original poster wanted something completely human sounding.

Thank you Trebor! I will have a try with that. If it doesn't work I will look at Blazemp that promises to do the job. Alfie Blazemp was not mentioned in the thread I suggested. According to this forum's search engine you are the only person who has written "Blazemp" in a post. On that thread Stevet...

A recent thread about video editing freeware ... http://forum.audacityteam.org/viewtopic.php?f=29&t=12063&p=82436 Just noticed the original poster of that thread had Windows Movie Maker, with which it is possible to re-dub (replace the video sound track), so they didn't need additional video editing...

When I play this record saved in wav file format, everything is OK, but when I export record to mp3 file format, I hear cracks... Are there any ways to "save" this record and export it to mp3 file without cracks? "Amplify" with default settings should set the peak amplitude to 0db, or "Amplify" and...