The most recent dated versions of custom and third-party firmware and tools for music hardware.https://altstrument.orghttps://altstrument.org/firmware/m-vave-fm-1/coralflower#v-0-1https://altstrument.org/firmware/m-vave-fm-1/coralflower#v-0-1First release.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/mutable-instruments-beads/drizzlet#v-drizzlet-2026-10-14https://altstrument.org/firmware/mutable-instruments-beads/drizzlet#v-drizzlet-2026-10-14Alpha. Adds the output limiter option and fixes the frozen-delay crash and half-written frozen-buffer saves.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/elektron-machinedrum/murdenihcam-usr-machines#v-main-ab92ccfhttps://altstrument.org/firmware/elektron-machinedrum/murdenihcam-usr-machines#v-main-ab92ccfNo tagged releases; this is the latest commit.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/teenage-engineering-op-1/op1-sdk#v-v0-1-0https://altstrument.org/firmware/teenage-engineering-op-1/op1-sdk#v-v0-1-0First public release; no firmware binaries.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/pigeon#v-main-abb62aahttps://altstrument.org/firmware/m-vave-fm-1/pigeon#v-main-abb62aaNo tagged releases; this is the latest commit. The project site offers a 0.1 beta candidate package, and the repository lists hardware checks for it as pending.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/reggae-os#v-main-b687e1ahttps://altstrument.org/firmware/m-vave-fm-1/reggae-os#v-main-b687e1aNo tagged releases; this is the latest commit.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/sidou#v-main-394a872https://altstrument.org/firmware/m-vave-fm-1/sidou#v-main-394a872No tagged releases; this is the latest commit.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/elektron-syntakt/sy-fm4#v-main-a596b63https://altstrument.org/firmware/elektron-syntakt/sy-fm4#v-main-a596b63No tagged releases; this is the latest commit.Thu, 15 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/novation-circuit-tracks/circuit-hacks#v-b1-3https://altstrument.org/firmware/novation-circuit-tracks/circuit-hacks#v-b1-3Beta; RC0.9 plus features not yet tested on hardware. Date is the commit date.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/novation-circuit-tracks/circuit-hacks#v-rc0-9https://altstrument.org/firmware/novation-circuit-tracks/circuit-hacks#v-rc0-9Makes the internal-memory pack read-only to the mod.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/novation-circuit-tracks/circuit-hacks#v-rc0-9shttps://altstrument.org/firmware/novation-circuit-tracks/circuit-hacks#v-rc0-9sSafer variant that does not write to the SD card by itself.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/roland-sp-404-mkii/dm-404#v-v0-1-4https://altstrument.org/firmware/roland-sp-404-mkii/dm-404#v-v0-1-4Adds TouchOSC control of the panel.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fantasma#v-1-0https://altstrument.org/firmware/m-vave-fm-1/fantasma#v-1-0Commit titled FANTASMA 1.0 on the fantasma-1.0 branch; no tags or releases. The branch has later commits, including an animated splash.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fm1-studio#v-v0-4https://altstrument.org/firmware/m-vave-fm-1/fm1-studio#v-v0-4Pre-release. Adds an FM-1-style view and JP-1 MIDI pad support.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/golana#v-1-0https://altstrument.org/firmware/m-vave-fm-1/golana#v-1-0Commit titled GOLANA 1.0 on the golana-1.0 branch, ahead of main; no releases. The v1.5.x tags in the repository belong to Felucca.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/noise-engineering-versio/iterum-versio#v-v1-0-0https://altstrument.org/firmware/noise-engineering-versio/iterum-versio#v-v1-0-0Clockable stereo delay with delay times up to 60 seconds, ping-pong, cross and stereo routing, skew between channels, probabilistic reverse, freeze and a DJ filter in the feedback path.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/elektron-machinedrum/kitbasher#v-main-10420echttps://altstrument.org/firmware/elektron-machinedrum/kitbasher#v-main-10420ecNo tagged releases; this is the latest commit.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/korg-volca-sample/lumon-os-xl#v-v1-0https://altstrument.org/firmware/korg-volca-sample/lumon-os-xl#v-v1-0First release.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/m-flasher#v-0-1-2https://altstrument.org/firmware/m-vave-fm-1/m-flasher#v-0-1-2Bundles a newer open bootloader build.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/m-flasher#v-0-2-0https://altstrument.org/firmware/m-vave-fm-1/m-flasher#v-0-2-0Pre-release. New front-panel window with a live flash map.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/mc-1#v-main-5214ceahttps://altstrument.org/firmware/m-vave-fm-1/mc-1#v-main-5214ceaNo tagged releases; this is the latest commit. The README describes it as experimental 0.3.0.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/elektron-machinedrum/mdmm#v-mdmm-v0-6-0https://altstrument.org/firmware/elektron-machinedrum/mdmm#v-mdmm-v0-6-0Adds a user guide, song slots, transport controls, SysEx import and export, and many editing features.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/mycelium#v-1-0-testhttps://altstrument.org/firmware/m-vave-fm-1/mycelium#v-1-0-testTest release; marked as a pre-release.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/niagara-drift#v-0-1-betahttps://altstrument.org/firmware/m-vave-fm-1/niagara-drift#v-0-1-betaFirst public version; marked as a pre-release.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/polly#v-0-4-2https://altstrument.org/firmware/m-vave-fm-1/polly#v-0-4-2Adds a setting to keep USB audio at full level regardless of the MASTER knob.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/slipway#v-1-0https://altstrument.org/firmware/m-vave-fm-1/slipway#v-1-0Windows app that lists community FM-1 firmware, checks downloads against published hashes and installs them through Felucca's own installer, with a stock-first rule and a USB recovery guide.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/roland-sp-808/rosetta-looper-os#v-main-90ab838https://altstrument.org/firmware/roland-sp-808/rosetta-looper-os#v-main-90ab838No tagged releases; this is the latest commit.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/tonitor#v-main-8e7463dhttps://altstrument.org/firmware/m-vave-fm-1/tonitor#v-main-8e7463dNo tagged releases; this is the latest commit. The changelog lists 0.23 as the newest version.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/polyend-tracker/tracker-firmware-mod#v-main-f5908e8https://altstrument.org/firmware/polyend-tracker/tracker-firmware-mod#v-main-f5908e8No tagged releases; this is the latest commit.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/tripdeck#v-0-2https://altstrument.org/firmware/m-vave-fm-1/tripdeck#v-0-2Git tag; no GitHub release page.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/velo#v-main-8f62ce0https://altstrument.org/firmware/m-vave-fm-1/velo#v-main-8f62ce0No tagged releases; this is the latest commit.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/virtual-fm-1#v-0-9-1https://altstrument.org/firmware/m-vave-fm-1/virtual-fm-1#v-0-9-1Standalone app and VST3/AU/LV2 plugin that plays the FM-1's FM engine and syncs presets and patterns both ways with an FM-1 running FM-1+VA, Felucca, SLOOP or Melodee.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/winampfm#v-0-11https://altstrument.org/firmware/m-vave-fm-1/winampfm#v-0-11Fixes knobs not responding on the device. Git tag; no GitHub release page.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/winampfm#v-0-12https://altstrument.org/firmware/m-vave-fm-1/winampfm#v-0-12Adds 28 full-screen visualizers. Git tag; no GitHub release page.Wed, 14 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/korg-sq-64/aleph-void-custom-fw#v-main-600bcb2https://altstrument.org/firmware/korg-sq-64/aleph-void-custom-fw#v-main-600bcb2Commit pinned by the firmware registry.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/choralroot#v-0-20https://altstrument.org/firmware/m-vave-fm-1/choralroot#v-0-20Telepathic Orchid-style chord instrument: one hand plays roots, the other shapes voicings, with key and performance modes, a bass line and a looper, on Felucca engines and the monome-grid ChoralRoot musical engine.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/choralroot#v-0-21https://altstrument.org/firmware/m-vave-fm-1/choralroot#v-0-21Telepathic Orchid-style chord instrument: one hand plays roots, the other shapes voicings, with key and performance modes, a bass line and a looper, on Felucca engines and the monome-grid ChoralRoot musical engine.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/elektron-digitone-ii/dn2-cfw#v-gt01-lab-buildhttps://altstrument.org/firmware/elektron-digitone-ii/dn2-cfw#v-gt01-lab-buildLatest hardware-run build listed in the README on this date; images are not distributed.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/korg-drumlogue/federico-gennari-drumlogue-units#v-3-2https://altstrument.org/firmware/korg-drumlogue/federico-gennari-drumlogue-units#v-3-2Free drumlogue units from a personal logue SDK fork: FM and physical-modelling percussion synths, a drone synth, two reverbs, a percussion-ensemble delay and two master compressors.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/felucca#v-1-6https://altstrument.org/firmware/m-vave-fm-1/felucca#v-1-6Custom UI colours, conditional steps, EUCLID, MIDI channel per track. Projects with conditional steps do not open on 1.5 or 1.5.1.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fm1-felucca-editor#v-1-3-0https://altstrument.org/firmware/m-vave-fm-1/fm1-felucca-editor#v-1-3-0Felucca v1.5 support.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fimba-1#v-0-6-1-betahttps://altstrument.org/firmware/m-vave-fm-1/fimba-1#v-0-6-1-betaMarked pre-release.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fm1-doom-e1m1#v-main-bde8893https://altstrument.org/firmware/m-vave-fm-1/fm1-doom-e1m1#v-main-bde8893No tagged releases; this is the latest commit.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fm1-emu#v-master-e52f464https://altstrument.org/firmware/m-vave-fm-1/fm1-emu#v-master-e52f464No tagged releases; this is the latest commit.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fm1-sid#v-master-687ce7dhttps://altstrument.org/firmware/m-vave-fm-1/fm1-sid#v-master-687ce7dNo tagged releases; this is the latest commit touching fm1-sid/. The emulator's firmware list labels the package 0.1.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fm1-studio#v-v0-3https://altstrument.org/firmware/m-vave-fm-1/fm1-studio#v-v0-3Pre-release.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-fm-1/fm1-bootloader#v-main-14b26f4https://altstrument.org/firmware/m-vave-fm-1/fm1-bootloader#v-main-14b26f4No tagged releases; this is the latest commit.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-smk-37/fm1-to-smk37#v-mainhttps://altstrument.org/firmware/m-vave-smk-37/fm1-to-smk37#v-mainNo tagged releases; date is the last commit.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/m-vave-smk-37/fomni37#v-smk37-0-2https://altstrument.org/firmware/m-vave-smk-37/fomni37#v-smk37-0-2Charles Vestal's FoMni chord harp on the SMK-37: pads as a strum plate, keybed holds the chords.Tue, 13 Oct 2026 00:00:00 GMThttps://altstrument.org/firmware/chase-bliss-chompi/frizz#v-v1-0-0https://altstrument.org/firmware/chase-bliss-chompi/frizz#v-v1-0-0First stable release; the controls, MIDI map and scene format are fixed from here.Tue, 13 Oct 2026 00:00:00 GMT