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ViPER4Android vs Virtual Surround: catalog facts
ViPER4Android	Virtual Surround
Free The open-source software is available without a license fee.	Free Free and open source under the MIT licence.
Android	Linux
Processes audio from every app, not just one player Convolver supports impulse responses for headphone correction	Toggle without changing the default audio device Accepts custom HRIR WAV presets like HeSuVi
Requires root and a Magisk module install Configuration is overwhelming and easy to make sound worse with	Requires PipeWire Linux only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
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 22, 2026	Official website Full listing and sources Checked October 1, 2026

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