Adjusting channel level

Effects, Recipes, Interfacing with other software, etc.
Forum rules
If you require help using Audacity, please post on the forum board relevant to your operating system:
Windows
Mac OS X
GNU/Linux and Unix-like
Post Reply
rdrs
Posts: 5
Joined: Mon Feb 04, 2008 12:54 pm
Operating System: Please select

Adjusting channel level

Post by rdrs » Mon Feb 04, 2008 1:07 pm

Hello there,

I've been recording my favourite radio program using mplayer (dumps to wav), then encoding to ogg. For some reason, probably related to the web broadcast, the result is far from satisfactory. In the case at hand, the right channel is clearly at a lower level than the left - it sounds quieter, and Audacity shows the same waveform, though with a tenth of the amplitude.

Since this is radio, I'm not overly concerned with quality. I would like to have the same volume on both channels, though. I thought about converting to mono from the higher channel, than to dual-channel mono. Notice, though, that I still have a stereo recording, its simply that the right channel has a really low gain.

What would be you suggestion for equalizing.adjusting the channels?

Renato

serendipity
Posts: 14
Joined: Mon Feb 04, 2008 4:02 pm
Operating System: Please select

Re: Adjusting channel level

Post by serendipity » Mon Feb 04, 2008 4:41 pm

Try splitting from a stereo to two mono tracks, then you can manipulate the "right" one. When satisfied, you can burn it back into whatever format you want.

rdrs
Posts: 5
Joined: Mon Feb 04, 2008 12:54 pm
Operating System: Please select

Re: Adjusting channel level

Post by rdrs » Mon Feb 04, 2008 11:11 pm

When you mean manipulate, do you mean use '>Effect>Amplify'? That's indeed a good point - how do I go about raising the level, or gain, of a given track?

Thanks,

Renato

alatham
Posts: 1591
Joined: Tue Jul 31, 2007 2:27 pm
Operating System: Windows 10

Re: Adjusting channel level

Post by alatham » Tue Feb 05, 2008 5:03 pm

1) Import the stereo track into Audacity.
2) Click on the track's name -> split stereo track. You will be left with two tracks now.
3) Highlight both of them ([ctrl]+a), and then effects -> normalize.
4) Now both tracks will peak at the same value. They should be close, but won't be exactly the same perceived volume. Use the gain sliders or the Amplify effect to tweak the tracks so they sound nice.
5) File -> Export. Don't overwrite the original file and you'll be left with a new copy of the show in stereo. Don't save the Audacity Project, it won't be worth much and will take up quite a bit of space.

Post Reply