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Decent Sampler vs Qsynth: catalog facts
Decent Sampler	Qsynth
Free Free to download; an email address is requested before the download.	Free Free and open source under the GPL version 2 or later.
Windows, macOS, Linux, iOS	Linux
Free on Windows, macOS, Linux and iOS Works as VST, VST3, AU and AAX plugin or standalone	Graphical control of FluidSynth Plays MIDI through SoundFont 2 files
Only plays instruments in the Decent Sampler format Download requires entering an email address	Linux focused Requires FluidSynth to be installed
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License: GPL-2.0-or-later
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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