Hi, I'm a bit confused by the fact I couldn't find any decent free WAV to MIDI file converter. I'm working on a J2ME game using MIDIs only and have bunch of WAVs that I'd like to convert to MIDIs. No luck so far. The only one converter I found was "almost okay". Unfortunately, since it couldn't export sounds shorter than 2 seconds it was unusable for me. I'm having lots of short sound effects... I would be very grateful if anyone can recommend any free (or if there's no free, commercial) WAV to MIDI file converter. Thanks in advance. -- MickeyMouse

It's pretty much impossible to create a general-case WAV to MIDI converter...

WAV files contain a waveform; a curvy line representing the vibration of your speakers. MIDI files contain a sequence of notes to press on virtual instruments.
That's apples and oranges.

Turning a WAV into MIDI is like turning a JPEG into a MS Word document, or an EXE into source code.

Quote: Turning a WAV into MIDI is like turning a JPEG into a MS Word document, or an EXE into source code.

Nice comparison. Sorry mate, but I'm affraid you can't do it...:(

It's rather like creating a complete blueprint of a decent car from a single photo.

- Piotr

If your the MIDI that you are trying to extract is from a very simple melody with little to no background noise, it's actually not too hard. It won't be perfect for sure, but depending on your needs, it might be good enough

I'm actually working on using aubionotes http://aubio.piem.org/aubionotes.html to pull out the beat and some basic freq info from full songs live. I'm really more interested in extracting the beat from a live sound feed to control a video sequence, so this may be a much more trivial problem than you are trying to solve. I'm planning on using some filters to get the sound down to just a kick drum or melody, but it's going reasonably well so far.

It has quite a few options as to what kind of algorithm it runs to detect the frequency and a sensitivity parameter to adjust. aubionotes will deal with saved files or real-time (using JACK)

This is all assuming you've got some linux to work on. I dunno if there is a win version.

Quote: Original post by MickeyMouse
I'm a bit confused by the fact I couldn't find any decent free WAV to MIDI file converter.
-- MickeyMouse

If there was a program that could do what you ask, I'd lose one of my biggest clients. They pay me good money to figure out what's going on musically in their audio files.