On Monday 24 September 2007 00:43, david wrote: > Matthias Schönborn wrote: > > On Sunday 23 September 2007 15:05:56 Simon Williams wrote: > >> Does anyone know of a program which will convert audio to midi? > >> Maybe that's a little ambitious. What about something that will show > >> which notes are being played or what key the audio is in? > >> > >> I have some mp3s which I want to play along to, but I have no idea what > >> key they are in or what notes are being played. The tracks move too > >> quickly for me to pick out the notes. Sonic Visualiser (http://www.sonicvisualiser.org) is very suitable for this sort of thing. It allows you to loop sections and slow them down, there are plugins (see http://www.vamp-plugins.org/download.html -- the ones using Paul Brossier's aubio library are obvious candidates) to help with pitch and key estimation, and you can look at the frequency content in a spectrogram. It won't do very meaningful audio-to-MIDI though. > There are a lot of programs that can turn audio recordings into MIDI > files. They all seem to be closed-source, proprietary, pay-money Windows > programs. My band leader and I tried out some of them (they can run > under WINE, typically, and my band leader uses Windows, anyway). > > Not a single one produced anything usable! They were able to identify > notes, and output them as MIDIs, but the output was pretty useless: > every note of every instrument on the same staff. That's not a bad result for such a tough problem. Even monophonic note tracking is tricky, depending a great deal on the instrument. Note tracking in a dense polyphonic mixture is much harder (if it's possible at all). Chris _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user
