audio2guitar vs Violin2Notes

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.

Violin2Notes uses AI to turn recordings of violin, viola, cello, and double bass into editable scores and music files. It can work with string parts even when other instruments are present. Users can upload audio, paste a YouTube link, or record in the app; supported upload formats include MP3, WAV, MP4, MIDI, and FLAC. An editor lets users adjust notes, timing, and layout before exporting PDF sheet music, quantized or unquantized MIDI, or MusicXML. Piano Roll mode provides a visual way to view and play along with a transcription. Free demos can be repeated, but each covers only the first 20 seconds of audio, a video, or an in-app recording and provides a PDF preview. Pro includes 50 full transcriptions per month, each up to 15 minutes. It costs $14.99 a month, or $6.24 a year with annual billing, shown as an equivalent monthly cost. The service is available on web, iOS, and Android, and the maker says transcriptions sync across those platforms. The maker says clear recordings focused on strings produce the best results; corrections can be made in the editor.