AI Remix Music Generator vs StemForge

AI Remix Music Generator is a web tool for turning a finished song into another tempo, genre, arrangement, or mashup while retaining recognizable material such as its melody. It accepts MP3, WAV, OGG, AAC, FLAC, and M4A files up to 50.0 MB, with a listed maximum input duration of 15 minutes. Stems are not required. Remix settings include style weight, weirdness constraint, audio weight, vocal gender, instrumental output, persona ID, and exclude tags. Each run costs 2 credits, and a new account receives 10 free credits. Results download as MP3 and remain in My Music for use with singing voice, mastering, and visualizer tools without another upload. The free plan permits one job at a time; paid monthly plans provide more credits and parallel jobs, starting at $14.99 a month. Aimusicis does not issue commercial-use rights, so users must clear source rights before publishing.

StemForge is a locally run, browser-based audio workstation for separating stems, extracting MIDI, generating audio, composing songs, mixing, and exporting. Demucs and BS-Roformer can separate audio into vocal, drum, bass, other, guitar, and piano stems; spectral analysis informs engine and model recommendations. For MIDI extraction, StemForge uses BasicPitch on instrument stems and faster-whisper with pitch tracking on vocal melodies. Its Synth tab generates text-conditioned audio with Stable Audio Open for up to 600 seconds, with optional audio or MIDI conditioning. Compose uses AceStep for song generation and RVC for voice conversion, with 14 built-in voices and a HuggingFace model browser. Mix combines stems, MIDI-rendered tracks, synth outputs, and composed songs; exports include WAV, FLAC, MP3, and OGG, individually or in a ZIP. The project says audio remains on the user's computer and no internet is needed after initial model downloads. Setup requires Python 3.12, FFmpeg, and FluidSynth with a GM soundfont. The software is free and open source.