Phone-Pass Jam Sessions

When friends want to make music on the fly in a living room, rehearsal space, or at a gathering, one person opens a nearby room and records eight bars of drums, bass, or chords. The room displays a passing “track baton”: the next person to receive it can add only one track or replace a designated track, so no one has to crowd into the same complex project.

Before passing the baton, each contributor chooses the loop length and where it should enter. The system automatically aligns waveforms for recording latency across devices, then locks the new part back to the shared beat in playback. After someone records guitar, the next person can listen to the full backing track on headphones and add vocals or an ambient sample.

The main screen is a replayable relay timeline: with one tap, the group can switch between versions to hear who added which track, when they added it, and how each round changed the song. When a particular relay sparks, they can branch from that point to try faster drums or a different melody, then export a stereo mix and the multitrack files.

The first release supports nearby iPhones, small loop-based projects, and basic audio tracks. It is not for remote, low-latency jamming or the full parameter set of professional recording software; the point is to get a few people who have just met up making music immediately, while letting each person hear what their addition changed.