StemMaster is a standalone app that analyzes audio stems, mixes and masters them, and explains its processing decisions. It balances, pans, equalizes and compresses stems based on their measured roles, and can detect song sections to automate gain, pan, filters, reverb and stereo width. Its tools include a vocal rider and spectral unmasking to duck competing frequency ranges. A commercial reference track can guide tonal balance, width and dynamics while retaining the selected loudness target. Listed targets include Streaming −14, Club −9 and broadcast EBU R 128 −23 LUFS. It loads WAV, AIFF, FLAC, MP3 and OGG stems, with exports including 24-bit audio and 32-bit float WAV. The built-in analysis engine works offline; an optional AI engine uses your API key and sends measurement summaries, not audio, to the selected provider. It runs on supported Windows systems and Apple Silicon Macs, but not Intel Macs. The full demo requires a license to export. Subscriptions start at $9.99 per month; a lifetime license is $99.00 USD per once.
Who it is for
StemMaster suits music creators who want to mix and master stems in a standalone app, including those working with supported DAWs. It is for users on supported Windows systems or Apple Silicon Macs; Intel Macs are unsupported.
What is good
- Processes audio locally, according to the maker
- Built-in analysis works offline
- Accepts five listed stem formats
- Reference track can guide tonal balance and dynamics
What to know first
- Not a VST plugin
- Intel Macs are unsupported
- Demo requires a license to export
- Unlicensed playback includes a periodic audio tag
Verdict
StemMaster combines stem analysis, mix automation and mastering tools in a standalone workflow. Check its system requirements and license terms: the demo cannot export, and Intel Macs are unsupported.
StemMaster plans and pricing
All plansCompared on AI audio mixing software
- Free plan
- No
- DAW plugin
- No
- Stem separation
- No
- Automatic EQ
- Yes
- Automatic dynamics
- Yes
- Spatial processing
- stereo
- Plugin formats
- standalone
