If you want to extract just the piano or bass from a complex song with drums and vocals, you must first "separate" the instruments. AUDIO to MIDI in Any DAW - Super EASY

Use an AI stem splitter (like Moises.ai, LALAL.ai, or RipX) to separate the YouTube audio into "Vocals," "Drums," "Bass," and "Other." Then, run only the "Other" or "Vocals" stem through the MIDI converter. This triples your accuracy.

As of 2026, AI models like Meta’s and Google’s Lyria are changing the game. We are moving from "transcription" to "source separation + transcription." The next generation of online converters will likely allow you to say: "Ignore the guitar, extract only the bass line from this YouTube video."

Such systems exist as offline Python scripts or paid desktop applications (e.g., AnthemScore, Samplab). They are not "online converters" because they require GPU minutes, not CPU milliseconds. The free online converter is thus a —a relic of a time when we believed simple DSP could solve a complex perceptual problem.