A/B Listener by Wavecolab vs Contrapunctus

A/B Listener is a standalone audio comparison app for music teams, enthusiasts, and audio professionals. The app allows you to compare two audio files using instant A/B switching. It is designed to support recording, mixing, and mastering workflows by making it easy to hear differences between versions. Hear the real difference Hear the real difference in your mix with instant A/B switching. Compare versions with a reference track and make confident mix decisions. Load and compare audio versions Load two audio versions and switch between them during playback. This helps you focus on changes in balance, tone, dynamics, and overall sound. Manual and automatic switching Switch between versions manually, or enable automatic A/B switching for hands-free listening. This can be useful when listening outside the studio, such as in a car or while moving. Time range comparison Select specific time ranges and compare the same section across both versions. This is helpful for reviewing transitions, vocals, drops, or mastering changes. Designed for audio work A/B Listener can be used to: - compare different mix versions - compare a track with a reference track - validate decisions in different listening environments Simple setup - no account required - no sign-in - no file uploads Offline listening Audio files remain on your device. No uploads or cloud processing are required, and the app can be used without an internet connection. Choose two files and start listening. Availability A/B Listener is free to download and use.

Give your melody a second voice. Contrapunctus writes counterpoint. Draw a melody on a simple grid — or import a MIDI or MusicXML file — and it composes a genuinely independent second line against it: real first-species counterpoint, obeying the voice-leading rules right down to the cadence. HOW IT WORKS • Draw a melody on the timeline (leave a gap for a rest), import MIDI/MusicXML, or type it in. • Contrapunctus generates a legal counter-line above or below, updating live. • Cycle the distinct valid options — ranked best first — and pick the one your ear likes. • Shape it with two dials: how strictly it favors sweet 3rds and 6ths, and how independently the voice moves. WHAT'S INSIDE • A real rule engine — no parallel fifths or octaves, proper cadences, and a musica-ficta toggle that raises the leading tone in modal keys. • Works in every mode: major, dorian, aeolian and the rest. • Live standard-notation preview of both voices. • MIDI and MusicXML import and export — for MuseScore, Sibelius, Dorico, Finale, or your DAW. • Fully offline. No account, no sign-in, no ads, no in-app purchases. • Private by design — Contrapunctus collects nothing. Your music never leaves your phone unless you export it. Contrapunctus is by Songdeed.