[Myce]

A local radiostation has a broadcast of four hours. They are required to play an x amount of music tracks by the station (about 6 per hour), but there has been demand to make the broadcast available as podcast without the music.

Could this make it possible to automatically remove the music from the MP3 file they have available? With 6 tracks per hour times 4 hours, manually removing the music is time consuming.

I doubt it, as it seems all vocals are are output to a single file...

Is there any other tool someone can recommend?

[lozf]

Presumably they own the rights on broadcast material, so they'd have to be directly involved in the podcast production. That given, it would probably be more straight forward to take the microphone feeds from their broadcast desk (via "aux-out" perhaps) and record only the spoken output separately.

Sox etc. could be used for silence detection, probably best done in post (scriptable), but could be piped through after experimenting with settings. Otherwise, even old desks can trigger when a mic channel fader is raised, so that too is a possibility for pausing the recording during music.

[TedDoesntTalk]

> Is there any other tool someone can recommend?

Audacity. I can think of two ways.

0. Import into audacity

1. Playback the recording at 4x (1 hour of playback for 4 hours real-time broadcast). Mark the edges where music stops and starts. You have to do that 12 times for 6 songs. Youll have to slow down near the changes in order catch the precise time of an edge. Delete the music between the two edges. Repeat 5 more times.

There may be audacity plugins that do what you want or do something closer to it.

2.use some combination of low pass and high pass filters to remove the music. It's not going to be perfect and you'll still need to edit out the filtered music anyway.

[fao_]

At this point it'd be easier to just duplicate the sources to an external recorder, right?