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Sound Recognition?

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Merton

Post: Aug 6th 2009 at 7:09 PM

As the Guitar Tuner has already been added... would it be possible to add sound recognition to edit the tabs? that would be; with the guitar connected to the mic as with the tuner, play a note(s) on the guitar and automatically recognize the pitch and duration, and write it on the score and tablature. This way, the tablature will be edited by actually playing the song, making it faster and more accurate, specially for those that are not accustomed to regular score notation.

Julian

Post: Aug 6th 2009 at 9:44 PM

well it's not so easy.. because when you play 2 or more notes at same time, it's not same as when you play only 1. split the notes, and determine each note frequency from a chord could be very hard, i'm not sure if it's possible.. is there any software that can do that ?? i know applications that can convert poliphony (one note by time) audio to midi, but never seen one that can convert a full song (multiple notes and tracks at same time )

nicolas [at] vizille.net

Post: Oct 23rd 2009 at 3:35 AM

It can be achieved for a single note, using fourier transfom (fft) [it's how the tuner actually works]. But it'll be CPU intensive. And you guitar needs to be perfectly tuned. For guitars, it's quite difficult, since there's 6 strings... Software are actually very bad at this work. Therefore, you're not a robot, so timing will be the one you play, you're warned... You'll have some 1/64 times, 1/32... I own a roland GI-10 guitar-to-midi converter. It works with a special pickup (roland gk2a or gk3). It features one "microphone" per string. Guitar is linked to converter with a 13-wires cable... The result is perfect, even in realtime, driving synthetizers, samplers... But quite complicated. If it would be easy, I will only have a cheap microphone. But definitively, it isn't. (I you really wants it, you can buy a roland gi20+gk3 system, and then input tab to TG via midi. I never tryied, but should work. Works on rosegarden or any sequencer so you can import a midi file, if there's any prob with TG)

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