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Creating a Minus Track on Mac

Posted: Sat Oct 05, 2013 11:03 am
by Mikethebook
Having discovered a lovely air on a CD with a wonderful backing, I would like to learn to play the piece and then be able to play it against a version of the track without the original whistle. I've tried using Audacity and the technique for removing a vocal to create a "karaoke" track but it doesn't seem to work and remove the whistle. Anyone gone down this road and successfully created their own backing track from an original tune?

Re: Creating a Minus Track on Mac

Posted: Mon Oct 21, 2013 11:12 am
by highland-piper
If the backing track is mainly lower pitch stuff you could make a shelf filter in Audacity and cut off everything above the fundamental of the lowest note the whistle plays.

Re: Creating a Minus Track on Mac

Posted: Mon Oct 21, 2013 11:41 am
by Mikethebook
Thanks. Sounds good. Can you give me more information on how to do that? I'm not that familiar with Audacity.

Re: Creating a Minus Track on Mac

Posted: Tue Oct 29, 2013 2:37 pm
by highland-piper
on the "effects" menu. equilization.

You just draw a curve by clicking and dragging.

You could experiment, or maybe someone knows the answer, but I'm guessing a d whistle is playing mainly above 550 hz (i.e., the d above middle C). Or is it an octave above that -- 1100?

Re: Creating a Minus Track on Mac

Posted: Wed Oct 30, 2013 12:06 am
by cboody
1100

Re: Creating a Minus Track on Mac

Posted: Wed Oct 30, 2013 2:25 am
by Mikethebook
Thanks for the tips. I'll give it a try but am realising the problem with this. The particular track I like has a Low F whistle in it so removing it would mean substantially cutting across the backing instruments. But I should find another track that uses a high D whistle and try it with that.

Re: Creating a Minus Track on Mac

Posted: Thu Oct 31, 2013 11:43 pm
by MTGuru
If it's a stereo recording, you can also try phase-inverting one of the channels then mixing both channels down to mono. Works best if the lead is centered and there's good L/R separation of the rest, otherwise much of the rest may also disappear. But yes, I've had good (or at least usable) results with some recordings.

Re: Creating a Minus Track on Mac

Posted: Fri Nov 01, 2013 2:32 am
by Mikethebook
Thanks MTGuru. That's the initial route I tried and described as "karaoke" when I started the thread. It wasn't particularly successful!!

Re: Creating a Minus Track on Mac

Posted: Fri Nov 01, 2013 5:49 am
by Tunborough
cboody wrote:1100
For the record, a concert-pitch, high D whistle starts at 587 Hz.