Samplers & Sample Libraries

Samplers play recorded audio (single hits, multisamples, loops, phrase-libraries) as instruments. The free side has matured around the SFZ open format and Decent Sampler's free DS bundle format, both of which have growing patch ecosystems. Spitfire LABS and BBC Discover give you cinematic-quality libraries for free if you tolerate registration.

For instruments that synthesize rather than play samples, see synths-free-oss. For drum machines specifically, see the drum section there. For tagging the resulting library, see audio-tagging-library.

Free SFZ / DS players

• ★ sforzando (Plogue) — free, cross-platform. SFZ format player; AU / VST3 / standalone. The reference free SFZ player.
• ★ Decent Sampler — free closed-source, cross-platform. Loads .dspreset libraries; very low-friction for end users; the free patch ecosystem (Pianobook, etc.) is huge in 2024-26.
• Liquid SFZ — GPL Linux SFZ player; also LV2.
• Sfizz — GPL cross-platform SFZ engine; LV2 / VST3 / AU.
• TX16Wx — free with paid Pro upgrade; modular sampler with disk-streaming.

Paid commercial samplers

• ★ Native Instruments Kontakt — paid (~$400) — the industry standard sampler. Most commercial libraries are Kontakt-format. Kontakt Player is free but only plays libraries marked "Player Edition" (most commercial libraries are).
• HALion / HALion Sonic (Steinberg) — paid; HALion Sonic SE is bundled free with Cubase.
• Falcon (UVI) — paid; 11-engine hybrid sampler / synth.
• Battery 4 (NI) — paid drum sampler.
• Geist 2 (FXpansion) — paid groove sampler.

Free / freemium sample libraries

• ★ Spitfire LABS — free closed-source libraries; registration + Spitfire app required. Tens of free orchestral / experimental instruments. Quality astonishing for free.
• ★ BBC Symphony Orchestra Discover — free; Spitfire app delivery; full BBC orchestra at low articulation count. Freemium upgrade to Core / Pro.
• ★ VS Chamber Orchestra: Community Edition — Versilian Studios; free SFZ / Kontakt orchestral library. The best free orchestral baseline in 2026.
• Versilian Studios Community Series — free SFZ instruments (piano, percussion, strings, etc.).
• DSK Music free packs — long-running free synth / sampler library.
• Pianobook (Spitfire-adjacent community) — free Decent Sampler / Kontakt instruments contributed by community; gigantic catalog.
• MuseSounds — free, bundled with MuseScore Studio; orchestral library tuned for notation playback.

Soundfonts (legacy GM-compatible)

• ★ GeneralUser GS — free SF2 GM soundfont; the best free GM soundfont.
• Arachno SoundFont — free large GM soundfont.
• Nice-Keyboards / Nice Bass / Nice-Drumkits — free SF2.
• ★ FluidSynth — LGPL software synth that plays SF2 / SF3; cross-platform; ships in most Linux distros.
• Sforzando — also plays SF2 (and SFZ).

Sample formats

• ★ SFZ — open text-based sampler format. Hundreds of free libraries. The default open format.
• .dspreset (Decent Sampler) — XML-based; growing free patch ecosystem.
• .nki (Kontakt) — proprietary; the commercial library format.
• .sf2 / .sf3 (SoundFont) — legacy but still useful for GM and chiptune.
• .exs24 — Logic / Mainstage native; hard to author outside Logic.

Tools to author / convert sample libraries

• Sfizz Editor / Sublime SFZ snippets — author SFZ by hand.
• TX16Wx — graphical sampler that exports.
• Polyphone (GPL) — SF2 editor.
• DecentSampler editor — author .dspreset files.

Pick this if…

• Free SFZ player: sforzando.
• Free patches with great UX: Decent Sampler + Pianobook.
• Free orchestral library: BBC Symphony Orchestra Discover or VS Chamber Orchestra Community Edition.
• Free GM playback: FluidSynth + GeneralUser GS.
• Industry standard, paid: Kontakt.
• Author your own samples in an open format: SFZ.