Try Basic Pitch, a free audio-to-MIDI converter with pitch bend detection, built by Spotify. Learn more or follow the instructions below.

• Press record and sing a ditty into your computer. Or drop a recording of any single instrument (piano, guitar, xylophone, you name it).
• Then get a MIDI version back. Just like that.
• Download the MIDI file to fine tune and make corrections in your favorite digital audio workstation.