Low Cost Sound levelling software Needed for AIFF-C Bird Sounds

You might want to try using a compressor. I don't use Garageband, but there probably is a compressor plugin in there. To get rid of the hum, you'll probably need to invest in a plugin designed for that purpose.

If you are only going to change the volume level of an entire file an you only have 20 files, Garage Band should work OK. Import the files one at a time, look at them using the UV meter then adjust by hand they peak at -3dB or 0dB or whatever you like. Next export them to iTunes.

Inside iTune make a "playlist" of all your recording. Right click the list and select burn to CD and then select "audio disk" asthe format. You may need to make two or more playlists of they all can't fit on one CD.

You can do better if you have more software. For example the Waves and or iZope plug-in de-noise filters are VERY good at removing hum and you can better master the recording using dithering, compression, EQ and what not. But you end up spending some real money of the profesional level software.

In Garage Band with none of the Waves or iZope plug-ins your best bet for removing hum is to EQ it away. Simply squash everything below say 80Hz and hope birds don't sing in that range (I doubt they do). The plug-ins will have very narrow range filters that can take out a hum and it's first N harmonics and no much else, the EQ is rather broad band.

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bwhli said:

You might want to try using a compressor. I don't use Garageband, but there probably is a compressor plugin in there. To get rid of the hum, you'll probably need to invest in a plugin designed for that purpose.

Click to expand...

Yes a compressor will work if you set the release to "way slow" but the OP only has 20 tracks and volume automation can work. He can just draw the volume line by hand and keep an eye one the uV meter.

I think it depends on if he wants milisecond level volume control or just to bring the entire track up or down. But GB and iTunes has most of what is needed.