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SoundSource vs FineTune: catalog facts
SoundSource	FineTune
Paid Paid app with a free download to try it before purchase.	Free Free and open source under GPL-3.0.
macOS	macOS
Per-app volume and output device routing Audio effects and Audio Unit support for any app	Per-app volume, mute and boost up to 4x Route individual apps to different speakers
macOS only Paid after the trial	macOS only Requires screen and system audio recording permission
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.