audio2guitar vs Piano2Notes

audio2guitar is a web app that converts uploaded audio into guitar tablature, chord diagrams and lyrics synchronized to the tabs. Its process isolates guitar, detects notes and chords, maps notes to fret positions and creates the notation. Free users upload MP3 files; Pro also accepts WAV, FLAC, M4A, OGG and AAC. The maker says it detects more than 170 chord types and annotates hammer-ons, pull-offs, slides, bends, vibrato and palm mutes. Pro adds MIDI and PDF export, separated vocals, bass, drums, guitar and piano stems as MP3, per-stem MIDI, and playback from 25% to 100% speed while preserving sync and pitch. A valid Google account is required. The homepage reports 97.8% string-assignment accuracy on GuitarSet and says clean recordings with prominent guitar work best. Most songs process in 3–6 minutes. Plans include Free at free, Pro Monthly at $8.99 a month, Pro Annual at $59.99 a year, and One-time at $9.99, paid once.

Piano2Notes uses AI to turn piano audio into sheet music, MIDI, or MusicXML. Users can record in the app, upload an audio file, or supply a YouTube link. It is designed to transcribe melodies and chords, including piano parts in recordings with other instruments. A built-in editor lets users adjust notes, timing, and layout, while Piano Roll mode provides a view for playing along. Exports include PDF sheet music, quantized or unquantized MIDI, and MusicXML, which the maker says can be used with notation software and DAWs. The free demo covers only the first 20 seconds of each recording, file, or video. Piano2Notes Pro costs $14.99 a month and includes 50 full transcriptions monthly, each up to 15 minutes. The maker says results work best with well-recorded, piano-focused music and offers an editor for correcting small errors. Piano2Notes is available on Android, iOS, and web, and work syncs between desktop and mobile platforms.