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PostPosted: Sat Oct 05, 2013 11:03 am 
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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?


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PostPosted: Mon Oct 21, 2013 11:12 am 
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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.


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


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PostPosted: Tue Oct 29, 2013 2:37 pm 
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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?


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PostPosted: Wed Oct 30, 2013 12:06 am 
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1100


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PostPosted: Wed Oct 30, 2013 2:25 am 
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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.


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PostPosted: Thu Oct 31, 2013 11:43 pm 
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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.

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


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


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