Is there software that convert sound recorded using a microphone into MIDI notes to write a musical score or audio tracks?

There are a number of freeware and shareware audio recording programs available on the net, the most popular being Audacity (see link below). This is a great program for getting started with recording sound into your computer. Once one audio track is recorded, you can add other tracks to play at the same time. You can also edit the audio, cutting and pasting sections to your heart's content, as well as applying the effects of any number of the program's powerful plugins. To convert from audio into MIDI notes in order to write a score, however, you need more powerful tools - tools which cost money. Also, you need to note the limitations of the tools. First, most programs that convert audio to MIDI/score can only work with monophonic tracks, for instance a melody sung by a single vocalist. Second, the program converts the sound based on pitch, and if the melody is even slightly out of tune, the score will be notated out of tune. You can explore programs like Neuratron AudiOScore Professional to see if this works for you. IntelliScore WAV to MIDI Converter is one program that can work with polyphonic tracks, for example, a piano playing chords. See the Related Links for "Audacity," "Neuratron AudiOScore Professional," and "IntelliScore WAV to MIDI Converter" to the left for the answer.