audio to mid? wha???

[mikegee]

audio to midi conversion??? for real?


i still have to download and try this, i wont believe it works til i see it work with mine own eyes though...

http://www.softpedia.com/get/Multime...stem-Pro.shtml

http://www.widisoft.com/mp3-to-midi.html

[dolivas]

in theory I would believe it shouldn't work correctly. I take it it's either trying to convert pitch information or frequencies in the recording to midi notes and on/off messages. I should try it out just to see if it works. But me thinks it would work very poorly.

[mikegee]

yea, it looks like it also records and converts any noise on the audio track, not a good thing... it does sound buggy, i will try it too.

[smopo24]

i didn't think that was possible; or at least likely to happen for a while yet. is the technology there for this?

[dagosto]

They've had these for a while. I had a monophonic program called midifier about three years ago for like 50 bcks. There was another polyphonic one for like $300. So the technology has come down in price. It's not gonna perfect. I garauntee it. It does offer some interesting options though.

[dolivas]

judging by this pic I think my initial suspicion might be correct. If that's the case unless they invented some ultra complex algorithm I don't see how this midi converter would work properly. But hey that's a challenge I'll dl it tonight and see what it does, shame the demo only notate or midifies the first 10 secs though.

[silenced]

as dagosto points out, these have been around for a while. the mono ones should be getting pretty smart by now. the clearer crisper and more pitch accurate your mono track, the better. if you think about what any of the auto-tune type products are doing.

on polyphonic, the math is many times harder, yet i believe there has been some success. whatever you do, expect to correct it - but it's a very convenient start if you get the right software and get the settings right.

you can even try songwriting in your midi sequencer by humming. pretty intuitive.

this product Celemony Melodyne will blow your mind if you haven't seen it. it's getting easier to use these tools in your DAW. similar math behind it.

[dagosto]

Melodyne is pretty cool. As far as I know even the newest version doesn't do any polyphonic pitch detection which is what the WIDI has to be doing some type of.

The way that polyphonic pith detection works is similar to a Fourier Transform. It has to find fundamentals of notes to encode. this is a very impractical process for most instrument due to the harmonics that give a certain sound it's timbre.

Lets simplify and pretend that you are turning a polyphonic audio track of sine into MIDI. Lets say the note A2 and A3 are playing at the same time and the 440 is slightly less in volume. Does the program see both notes or one note with the first harmonic. Vice versa, if you feed it a monophic square wave does it see notes at each odd harmonic. How could it possibly know. Short answer, it can't.

[dagosto]

I downloaded the demo version of of the WIDI audio to MIDI audio unit. The evaluation only runs for a few seconds which is sucks but I got it to output the first part of a sample. Here is the link to the mp3's:

http://www.yousendit.com/transfer.ph...AFCE3274CBD63F

The WIDI input is the original file. The WIDI output is the MIDI it created sent out to Kontakt2 with a jazz guitar bank loaded. The demo really doesn't last long enough to allow experimentation with the settings but I think this gives a pretty good idea of what to expect.

[Nubus]

Outside of expirementation what is a real use for this? I would just learn the part and play it on a MIDI controller. I can't imagine needing a MIDI sequence of any audio that I couldn't do that with.