Birthday Song AI vs MusiCraft Stem Splitter

Birthday Song AI has no write-up on Specifiction yet; its figures are above.

MusiCraft Stem Splitter is a browser-based tool for separating audio into stems. Its 66 separation modes cover vocals, drums, bass, instruments, choir and sound effects, with options including vocal-and-instrumental, 4-stem, 6-stem and full-band splits. The listed stem types also include guitar, piano, strings, brass, woodwind, saxophone, speech, music and other instruments. Users can upload MP3, WAV, M4A or FLAC files, or select a track from My Music. The in-browser player lets them preview stems and solo or mute them before downloading. Stem splitter mode pages limit uploads to 100 MB and eight minutes. The Free plan includes two editing runs per month and preview playback, but downloads are locked. Paid plans start at $7.49/mo. In Speech / Music / SFX mode, processing costs five credits per minute and output is 320 kbps MP3; 16-bit WAV is available on Studio and Business. The privacy page says uploaded audio is processed securely, not shared with third parties, and stems are deleted after download. The privacy policy also says uploads and generated content may be processed by AI, storage and infrastructure providers.