Question: I'm looking for a tool that can transcribe music from MP3 files into readable sheet music.

Klangio is an AI-based music transcription service that converts audio files or YouTube links into sheet music, MIDI and MusicXML files. It has instrument-specific tools like Piano2Notes, Guitar2Tabs, Sing2Notes and Melody Scanner, so it's good for musicians. It's got features like fast and accurate transcription, polyphonic detection, adjustable settings and multiple download formats. Klangio is a web app and mobile app, and you can pay in various ways, including with a free trial.

Another good option is AnthemScore, which uses machine learning technology to convert audio files (MP3, WAV) into sheet music. It's available for Windows, Mac and Linux, and it's got some advanced editing abilities, like changing time signature, key signature and tempo. You can save files as PDF, musicXML or MIDI, and it's got other abilities like copying and pasting notes, setting measures and slowing down playback without changing pitch. AnthemScore comes in three versions, so you can pick the one that's right for you and your budget.

If you want something more straightforward, try ScoreCloud. This software uses sophisticated AI technology to transcribe audio recordings into sheet music with a relative minimum of fuss. It can transcribe both audio and MIDI files, and it's got some powerful editing abilities. ScoreCloud is accessible even if you don't have a lot of music theory knowledge, and there are several subscription plans to match your needs. You can sync your work across devices with the iPhone and iPad app, ScoreCloud Express.