YouTube audio is a live performance or a mastered track. It has natural tempo fluctuations (rubato) or a fixed tempo not aligned to a grid. Your resulting MIDI file might not snap to a 120 BPM grid; it will be a "straight" transcription of the audio speed.
There are several benefits to using a YouTube to MIDI converter online: Youtube To Midi Converter Online
And now, her ghost was playing through Leo’s cheap Behringer interface. YouTube audio is a live performance or a mastered track
Go to YouTube, find a video with a single melodic instrument (e.g., "Miles Davis trumpet solo" or "Chopin Nocturne piano"). Avoid full bands. There are several benefits to using a YouTube
Because MIDI is not a recording of sound but a map of musical events, converting a song to MIDI is essentially asking an AI to listen to a song and write down the sheet music.