Masterpiece: play sampled pipe organs on any computer

Recital

Seventeen minutes, nine organs, recorded from Masterpiece's audio output.

Programme and credits: attribution page.

Recital II

Twelve minutes, fifteen organs, filmed from the running console.

Programme and credits: attribution page.

Consoles

Thirty-seven sample sets tested, from a nine-register Flentrop to Nancy's four manuals.

Lipiny console — Lipiny — a historic case, drawstops lettered in Fraktur
A. Volkmann, 1898 · 25 stops · sample set by Piotr Grabowski

Kraków console — Kraków, St. John Cantius
40 stops, three manuals · sample set by Piotr Grabowski

Melcer console — Melcer Chamber Music Hall
chamber organ · sample set by Piotr Grabowski

Raszczyce console — Raszczyce
Vermeulen, 1965 · 21 stops · sample set by Piotr Grabowski

Nancy console — Nancy — four manuals, drawstops colour-coded by division
65 stops, four manuals · sample set by Piotr Grabowski

Lemmer console — Lemmer — a Flentrop, with the recording perspective on the case
Flentrop, 1977–78 · 9 registers · sample set by Augustine’s Virtual Organs

Nagyrákos console — Nagyrákos — an Angster organ
Angster, 1938 · demonstration set · sample set by Augustine’s Virtual Organs

Hungarian village organs console — Hungarian village organs — the organs of two village churches in one set
composite set · sample set by Augustine’s Virtual Organs

Zalalövő console — Zalalövő — a modern baroque organ
Aquincum · demonstration set · sample set by Augustine’s Virtual Organs

Császár console — Császár — a Luber organ
F. X. Luber, 1793 · demonstration set · sample set by Augustine’s Virtual Organs

Vasvár, Dominican church console — Vasvár, Dominican church
demonstration set · sample set by Augustine’s Virtual Organs

Kézdimartonfalva console — Kézdimartonfalva — a Dutch harmonium
harmonium · sample set by Augustine’s Virtual Organs

Szombathely console — Szombathely — an Eule organ
Eule · demonstration set · sample set by Augustine’s Virtual Organs

Hajós console — Hajós — an Angster organ
Angster · demonstration set · sample set by Augustine’s Virtual Organs

Székesfehérvár, Franciscan church console — Székesfehérvár, Franciscan church — a Mauracher organ
Mauracher · demonstration set · sample set by Augustine’s Virtual Organs

Székesfehérvár, Cistercian church console — Székesfehérvár, Cistercian church — an Angster organ
Angster · demonstration set · sample set by Augustine’s Virtual Organs

Ják Abbey console — Ják Abbey — an Angster organ
Angster, 1902 · demonstration set · sample set by Augustine’s Virtual Organs

Monor, Reformed church console — Monor, Reformed church — a Rieger organ
Rieger · demonstration set · sample set by Augustine’s Virtual Organs

Budapest, Church of the Holy Spirit console — Budapest, Church of the Holy Spirit
demonstration set · sample set by Augustine’s Virtual Organs

Each of these is a separately published sample set, five by Piotr Grabowski and fourteen by Augustine’s Virtual Organs. Full credits are on the attribution page.

Memory

Samples are held at 24 or 16 bits, optionally folded to mono, with release tails streamed from disk. Stops, perspectives and individual ranks can be excluded from a load.

Friesach, 44 stops, 17 GB: 21.6 GB as 32-bit float, 16.2 GB at 24-bit, 4.65 GB at 16-bit streamed, 2.33 GB in mono. Opens in 77 s at full size, 25.9 s streamed, 18.9 s from the sample cache.

Packages

Sets play straight from their RAR archives (RAR 4 and 5, solid and multi-volume) and GrandOrgue .orgue packages.

Setup

Wiring

Couplers, octave couplers, reversibles, crescendo and alternate ranks are resolved through each set's own switch network.

MIDI settings: keyboards, channels and learning

Your keyboards

Manuals are mapped by MIDI channel, with per-manual key range, transposition, velocity window, short octaves and debounce. Drawstops, pistons and shoes are assigned by MIDI learn, and a console mapping can serve as the default for every organ.

Combinations

Every organ gains up to 100 generals, divisionals per manual and a 999-frame stepper, with named combination sets and organ favourites assignable to thumb pistons.

Voicing

Level and tuning adjustments per rank and per pipe, with two voicing sets for A/B comparison.

Engine settings: DSP switches, preload and streaming

Loading

Resident format, mono folding, sample rate, release streaming, sample cache and memory limit, saved per organ or as defaults.

Routing

Ranks are routed per organ to up to eight stereo output pairs.

Engine

Release selection	By key hold time, crossfaded from the sustain loop
Wind model	Chests, bellows and valves solved as a coupled system; pitch and level track pressure
Enclosures	Per-box level and low-pass filtering
Tremulants	Amplitude and pitch modulation per chest and per pipe
Interpolation	Hermite (Catmull-Rom)
Polyphony	1536 voices; release-first voice stealing
SIMD	AVX2, SSE2, NEON (experimental, 3–5× at 512 voices)
Temperaments	Organ's own, equal, Werckmeister III, Kirnberger III, Vallotti, Young II, ¼-comma meantone, Pythagorean, Silbermann; Scala `.scl`
Sample formats	WAV, WavPack; 16/24-bit resident, mono folding, rate conversion on load
Definitions	Hauptwerk-format XML (full and compact), GrandOrgue `.organ`
Packages	RAR 4/5 (solid, multi-volume), GrandOrgue `.orgue`
MIDI	Multiple inputs, learn, drawstop lamp output, SysEx jamb displays, virtual input (macOS, Linux)
Recording	MIDI with stop and shoe events; audio; metronome

Source

Language	C++20
Framework	JUCE 9
Build system	CMake 3.22+, Ninja; dependencies fetched at configure time
Compilers	MSVC 2022, GCC 12+, Clang 14+
Targets	Windows x64; macOS arm64, x86_64; Linux x86_64, arm64, armhf; Android; iOS
Formats	Standalone, VST3, LV2, AU
Licence	GPL-3.0-only

cmake --preset dev
cmake --build --preset dev

Platform dependencies: README.

Masterpiece