ChordSequence vs ChordU

ChordSequence is a free set of browser-based music tools for composing and exploring chord progressions. Its player performs chords selected by the user with drums, bass, piano, guitar, and synth, drawing on 548 rhythms that include pop, rock, salsa, and reggae. You can reorder chords, arrange them into sections, loop those sections, and edit individual instrument parts. The mixer offers volume, pan, mute, solo, EQ, and compression controls for each instrument, plus reverb for the overall mix. Songs can be exported as WAV audio or MIDI notes for use in a DAW. Other tools include a chord finder, transposer, key detector, Circle of Fifths, tuner, metronome, guitar and bass tabs, and a drum machine. The browser player is stated to work in Chrome, Firefox, Safari, and Edge. An Android app works offline, needs no account, and supports Android 8.0 or later; iPhone users can use the browser player. The Free plan is free, with all features, no usage limit, and WAV and MIDI export.

ChordU identifies chords in audio and aligns them with musical notation. Users can also find a song on YouTube, copy its link and search for it in ChordU. A song may have simplified, advanced, bass or edited chord arrangements, as well as treble-clef and bass-clef note versions. Chord diagrams cover guitar, piano, ukulele and mandolin. On the website, users can obtain PDF chord and note sheets, MIDI files and synthesized notes in WAV format. MusicOnly mode provides controls for vocals, bass, drums and other instruments, and can export a mixed audio download. Local music uploads and MusicOnly for those uploads require Premium; Premium also permits chord downloads without a stated monthly limit. The Free plan has limited access, while Premium costs $5.00 per month. ChordU is available on Android, iOS and the web. Its terms limit song and chord use to personal, non-commercial purposes.