audio2guitar vs Melody Scanner

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.

Melody Scanner converts songs into piano arrangements, chords, and melodies. You can provide music by recording it, uploading an MP3 or WAV, or pasting a YouTube link. Its Arrangement Mode makes piano arrangements suited to a chosen playing difficulty and offers different styles. Lead Sheet Mode transcribes a melody and chords for an instrument; Universal Mode transcribes audible notes from solo recordings of different instruments. Results can be reviewed and edited as sheet music, in pianoroll, or as guitar TAB. Export options include PDF, MIDI, MusicXML, and GuitarPro. The free plan allows recordings up to one minute and sheets up to 40 bars, with PDF export. The FAQ cautions that the main aim is turning a song into notes, rather than ensuring an accurate transcription. Melody Scanner is available on Android, iOS, and the web. The Free plan costs nothing; the Monthly Subscription is $499 a month, and the Yearly Subscription is $3,999 a year.