Audacity 2.2.2 and Windows 7
I’m a new user and I’m trying to equalise sound across a single mp3 (or FLAC) track.
We recently held a meeting in a large room and some participants were nearer to mics than others, therefore the volume varies across the recording. Is there a way to equalise the volume level automatically?
Thanks in advance
First, a couple of things -
When you boost the volume you’ll also boost the background noise. There’s not much you can do about that. If you are going to use (or try) Noise Reduction, do that first while the noise is relatively constant. But, in this type of environment Noise Reduction will probably do more harm than good anyway.
“Equalization” has a different meaning in the audio world… In the audio world equalization is a precise kind of tone control with more than just bass & treble controls that allows you to individually adjust multiple frequency (pitch) bands.
In your situation, it’s OK to say “equalize the volume”.
The best solution is to “manually” adjust-up the quiet parts with the [u]Envelope Tool[/u]. The trick is to ramp-up and ramp-down the volume so there are no sudden changes.
The [u]Limiter[/u] set to Hard Limit can knock-down the peaks. The Make Up-Gain option will boost all of the levels higher (making the quiet parts louder).
The [u]Compressor[/u] also “pushes down” the louder parts, and again Make-Up Gain is used to bring-up the overall volume. (Compression works more slowly than limiting and there are more settings to mess with.)
There is also an optional plug-in called [u]Level Speech[/u].