Introduction : [Wav to
Mid, MP3 to Mid, CD to Mid converter]
WAVE to MIDI, MP3 to MIDI, CD to MID: Recorded music can be converted into score!
Maybe you have a particular sound file(wave or mp3 files) that you wish to transfer into your 7650 or other mobile telephone through infrared, because the file size is too larger.
Now you can use WIDI to reduce the size of .wav .mp3 files before transferring! Just try it!
WIDI is designed to automate transcribing of music. That means that the task of retrieving music score from an audio record, which is usually accomplished by a hard work of a professional musicians,is about to be solvable by a computer.
You can take you favorite audio record and convert it into notes.
WIDI allows both monophonic and polyphonic conversion. You can even record your own voice and then convert it into score! Then you can change it in any way, print, reassign instruments, cut off some notes, add new, etc. with your favorite MIDI Editor (such as CakeWalk).
Holiday Special:
Now after you purchase Widi Recognition System, you will get a
pretty MP3-Wav Converter ($19.95) free!
Just need mail us with your purchase ID! Why not order it now? Save $19.95!A sample file converted by WIDI:
Name: Badinerie - J.S.Bach
MP3 File: Click Here Size: 478K
Midi File: Click Here Size: 12K
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New in Version 2.70:
New recognition algorithm was released.
New features - CD grabber and Wave Recorder, as well as ability to use ACM-compressed WAVEs. Some important bugs were fixed.
New in Version 2.6:
MP3 support added. Possibility to use intermediate files for faster calculations added. Windows NT 4.0 and Windows 2000 are supported. Now you can keep recognition settings and options in system registry. One minor bug with MIDI file writing fixed.
New in Version 2.51:
Two bugs were fixed: one with FFT transform, and one with 44100Hz WAVE buffering. Quality of FFT method improved greatly, try it!
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Just a few words on how this program works:
Every musical note has pitch, which corresponds to the frequency of main tone. Modern musical scale has almost 100 pitches with frequencies from approximately 30 hertz to 4,5 kilohertz. Neighbor notes frequencies (C and C#, E and F) are always related as 2 in 1/12 power, so notes making an octave interval (=12 smallest called semitones) have frequencies rated as 1:2. There are other scales too, but they are rarely used.
WIDI performs music recognition in several steps:
First it produces some kind of spectra-like data, this is called further the "WAVE->Pitch" conversion. Now there are two different algorithms implementing this step, each of them has its own advantages and disadvantages.
Then it multiplies that spectral data by coefficients of "Equalizer", making some pitches louder and some pitches more quiet (This is only for Widi for Windows version).
The third step is an actual retrieval of notes from the spectra, it is called "Pitch->MIDI" process and there are also two algorithms making that.
The final step is producing the MIDI file structure, and you can choose some attributes of the output MIDI file.
Nowadays investigations of more complex schemes are taking place, it seems that they will allow to differentiate musical instruments and make fewer errors. | 
User's Letter
