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Article #2469Re: Is it possible to isolate instruments/vocals in a mono recording? Can pitch correction be added to individual elements?
From: Arny Krueger
Date: Fri, 30 Nov 2007 20:28
Date: Fri, 30 Nov 2007 20:28
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3086 bytes
"Travis Garrison" <travisgarrison@gmail.com> wrote in message news:6fbc5497-574a-4238-8577-ec6a5e884b93@t47g2000hsc.googlegroups.com > At the International Computer Music conference in Miami a > few years back, I recall attending a paper session > discussing this exact topic. The researchers took on the > task of separating out the two instruments from a Mozart > piano/violin duet. As this was a piece with a readily- > available score, the researchers knew in advance which > pitches and rhythms were present in each instrumental > part. The extraction was a matter of synchronizing a > MIDI score with the audio recording, and using that as a > guide to perform selective FFT bin extraction. In this > case, separating the violin from the piano met with > marginal success. The difficulties lie when the two > instruments occupy the same frequency range. An FFT > analysis will give you frequency content over time, but > cannot distinguish whether a certain frequency bin > originated with piano or violin. > > The resulting extracted instruments were recognizable, > but both suffered from washy FFT resynthesis artifacts. > But still impressive. Give it a few more years and I'm > sure someone will crack this problem. YOu seem to be conversant with the SOTA in this area. Has anybody come up with software that would transcribe a recording into MIDI?
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