FM-1 firmware · 1.0
S1Vave
An eight-voice analog-style synth after the Roland SH-101 and S-1, with a sub-oscillator, a self-oscillating filter and hands-on controls for live tweaking.
- Made by
- Andrew GG
- Built on
- OberVave
- Install
- On the FM-1 Firmware Hub · source on GitHub
- Scan
- Scanned, nothing harmful found · Oct 31 What we checked
- Last checked
- October 31, 2026
What S1Vave does
- You play an eight-voice virtual analog synth with sawtooth, pulse, sub-oscillator and pink or white noise.
- A cascaded four-pole filter self-oscillates, tracks the keyboard and sweeps from the calibrated ADSR envelopes.
- OSC DRAW lets you draw your own wave and OSC CHOP slices it into metallic overtones.
- Mono, unison, poly and chord voicing modes cover leads, basses, chords and pads.
- Each track has its own length, clock division, swing and transpose for polymeters.
- Chorus, tempo-synced ping-pong delay and plate reverb with seven room types sit at the output.
- Hold SEQ and use the sixteen keys for steps, and tap SAVE twice to store a sound.
Its modes
- PERFORM
- Tap HOME to reach cutoff, resonance, envelope depth and portamento time on the four knobs for live tweaking.
- OSC CORE
- Set oscillator range and balance the square, sawtooth and sub-oscillator levels.
- SUB / NOISE
- Choose the sub-oscillator octave type, set noise level, pick pink or white noise, and fine tune.
- OSC DRAW
- Draw a sixteen step or interpolated wave and set its frequency multiplier.
- OSC CHOP
- Dial comb slicing repetitions and overtone depth for metallic and bell-like timbres.
- FILTER
- Shape the four-pole cutoff and resonance with LFO depth and keyboard follow.
- ENVELOPE
- Set attack, decay, sustain and release on the calibrated ADSR.
- LFO
- Set LFO rate and waveform, switch tempo sync on, and choose normal or fast audio-rate speed.
- FX MIX
- Balance chorus type, delay level, reverb level and delay time in one view.
- VOICE
- Pick mono, unison, poly or chord voicing, portamento mode, transpose and master volume.
What Les checked
S1Vave 1.0Scanned October 31, 2026
What we checked for
- The file matches the checksum the FM-1 Firmware Hub records for this version
- It's the same file we saw when this release first came out
- It opens cleanly as an FM-1 firmware, nothing damaged
- It doesn't show up on your computer as a keyboard, mouse or other input device
- It doesn't show up as a USB drive or network adapter
- Its text mentions no computer command tools, like PowerShell, Terminal or a download command
What we found
- MIDI and audio, as expected
StatusScanned, nothing harmful found
Les scans every firmware here whose file is public, and shows what it checked and what it found. A scan lowers the risk; it can't rule it out. This firmware is made by its author, not by Les or M-VAVE. Back up first, and install at your own risk. How Les scans firmware
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Les is independent and not affiliated with M-VAVE or the firmware authors. M-VAVE and FM-1 are trademarks of their owners.