capfuse: Mashup & Remix Maker

Make a mashup in 30 minutes — even if you have never DJed. capfuse is a mashup and remix maker for iPhone and iPad. Pick one song for the beat and one for the vocal. capfuse splits both into stems, detects the key, BPM and song sections, and lays the vocal over the matching sections of the beat — chorus on chorus, verse on verse. You start from a mashup that already plays, then make it yours. WHAT YOU CAN DO - Make a mashup of two songs on your iPhone - Put the vocal of one song over the beat of another - Remove the vocal from a track and play the instrumental inside the app - Play a song without its vocal, karaoke-style, inside the app - Isolate a vocal — an acapella — and lift it onto a different song - Find the key, BPM and structure (verse, chorus, bridge) of any track - See which of your songs are harmonically compatible - Cut and insert phrases bar by bar - Start right away with the built-in demo songs, no music of your own needed PICK A BEAT AND A VOCAL Choose one track for the beat and one for the vocal. Each pick starts a preview from the chorus: the beat plays without its vocal, the vocal plays on its own, and once both are set you hear them together. Create the project and the vocal is placed onto the matching sections of the beat. It is a starting point, not a finished mix — what happens next is up to you. AI STEM SEPARATION, FREE AND AUTOMATIC Every track you import is split into four stems — vocals, drums, bass and other — by an AI model running on import. Nothing to switch on, and no paywall in front of it. It doubles as a vocal remover and a stem splitter: mute the vocal and keep the backing, or solo the vocal on its own, and play the result inside the app. Guitars, piano and strings are grouped into "other". capfuse separates four parts, not every instrument. AUTOMATIC KEY, BPM AND SECTION DETECTION Import from your music library or from Files. Every track is analyzed for key and tempo, and divided into sections: verse, pre-chorus, chorus, bridge and interlude. Video files such as mp4 work too — the audio is extracted automatically. COMPATIBLE TRACK SUGGESTIONS Once one side is chosen, capfuse lists the songs in your library that fit with it, most compatible first. No Camelot wheel, no music theory, no guesswork. Choose from what already works. AUTOMATIC BEATMATCHING Tempos are synced for you and phrases land on the downbeat. Blending two songs normally means matching keys by ear and nudging tempos until they lock. capfuse does that part. EDIT ON THE BEAT Select a beat and cut or insert from there. Cut a number of bars before or after it, and the rest closes up. Insert a phrase and it is fitted to the project's tempo — from the beat song you get the backing, from the vocal song just the vocal. Add more tracks and stack a third song on top. WHAT CAPFUSE DOES, AND WHAT YOU DO capfuse handles the tedious part: stems, key and BPM, sections, tempo and alignment, and a first arrangement to start from. Which phrase to cut, what to bring in and where the mashup goes from there is your call. That is the part worth doing. DEMO SONGS INCLUDED New to capfuse? The first launch walks you through a mashup made from demo songs, so you can hear how it works before importing anything. Demo songs and demo projects do not count toward the free limits. BUILT-IN LIBRARY Finished mashups are mixed down and saved to your library. They play back like any music app, with background playback and lock screen controls. FREE TO START Import tracks, split stems, detect keys and build mashups for free. Premium removes the limits on how many source tracks you can register and how many mashups you can create. GOOD TO KNOW Separated stems and finished mashups play inside capfuse. There is no audio export, so they cannot be saved out as files. Made for anyone who has ever heard two songs and thought "those would go together.