Splitfire 3465 Furioso
What it is
- Splitfire Furioso is a compact live sampler Rack Extension for Reason. It captures short audio segments — up to roughly four seconds — and lets you play them back as a sliced instrument or as a pitched sample across the keyboard. Where Splitfire Rubato is the expressive flagship, Furioso is its smaller, fiercer sibling: three voices, sixteen slices, two rack units, designed to be stacked. Run five Furiolos in a Combinator and you have a full drum kit decomposed into rhythmic voices — each independently sliceable, CV-Modula table, and mutable from the front panel.
- Furioso emphasizes immediacy. Recording is one button press. The waveform updates live. The voice machinery is click-free across all combinations of voice mode, play mode, and loop mode. CV abuse — fast LFOs into slice select, rec gate, stutter rate — produces “controlled mayhem” rather than artifacts.
Quick start
- Wire audio in. Connect the back panel IN L / IN R from any source — synth, drum machine, sampler, mic preamp.
- Set REC mode. Three small buttons under the HOLD label select: HOLD records while held, FIXED records a fixed length on press, Q quantizes start and end to transport bars.
- Hit REC. The IN meter to the right shows incoming level. The waveform updates live as you record.
- Play notes. Furioso accepts MIDI like any instrument. Each note plays a slice (C3 = slice 1, C#3 = slice 2, …). Switch to pitch mode to play the whole sample pitched across the keyboard.
- Modulate live. SPEED, REV, LOOP, LEN, STUT all respond instantly. CLR erases, UNDO restores. Recording over an active sample is supported — voices keep playing through a brief swap fade.
Front panel walkthrough
Sample zone (far left)
| FADE MODE | Selects how the slice/loop crossfade is applied (manual length vs. auto). |
| XFADE | Length of the loop crossfade — longer = smoother seam, shorter = tighter character. |
| SLICES | Slice count and slicing mode. Button toggles Auto (transient detection) vs. Manual (equal divisions 1..16). The back-panel SLICES CV overrides both when patched. |
| TRANS | Transient sensitivity for auto-slice. Higher = more slices, lower = fewer. |
Stutter zone
| SIZE | Stutter window length. Frozen at engage time. |
| STUT | Engage/disengage stutter. Also responds to back-panel STUT gate input. |
| RATE | Stutter playback rate. Live — can sweep while stuttering. |
Pro tip: Window is frozen at engage but rate is live — engage at one position, sweep RATE over time, get evolving textures from a single audio instant.
Record zone
| REC | Start/stop recording. Behavior depends on rec mode setting. |
| CLR | Clear the current sample. Display blanks. |
| UNDO | Restore the previous sample. Useful when you clear or overdub by mistake. |
| HOLD / FIXED / Q | Three small buttons under HOLD label — rec mode select. |
| IN meter | Four-LED input level indicator — green/green/yellow/red. |
Channel zone
| MUTE | Mute this device. Display dims, voices stop. Also responds to back-panel MUTE CV. |
| VOICE Q | Poly (3 voices), Mono (re-attack), Legato (envelope preserved), Retrigger (hard reset same-note). |
| SIZE | Recording quantize size — five bar fractions for Q mode. |
| LEN | Fixed-mode rec length. |
Playback zone (right side)
| SPEED | Playback speed. Piecewise: 0→1× lower half, 1× at center detent, 1×→3× upper half (deliberate aliasing zone). |
| PITCH | Play mode: Slice (one slice per note) or Pitch (whole sample pitched across keyboard). |
| REV | Reverse playback. |
| LEN | Loop length within the playing slice or pitch region. |
| LOOP / MODE / PERF | Loop on/off, behavior, and performance/expression switches. |
Voice parameters (top-right cluster)
| ROOT | Root note for slice-mode key mapping. C3 by default. |
| PORTA | Portamento glide time, Legato/Mono modes. |
| ATK / REL | Envelope attack and release. |
| PAN | Stereo pan spread across the three voices. |
| DEGR | Bit/sample-rate degradation. Top of knob: 4-bit @ 6 kHz, S900/SP-12 territory. |
| VOL | Output volume (post-degradation). |
Display
The amber display shows: (top) M mute status, loop icon, transport-play arrow, slice info; (bottom) playhead position, quantize-lock indicator, slice-difference indicator. The large numeric is the currently triggered slice in slice mode, or the pitch value in pitch mode.
Voice, play, and loop modes
Three orthogonal mode selectors interact to define how the device responds to incoming notes.
Voice mode (VOICE Q)
| Poly | Up to 3 simultaneous voices. New notes allocate fresh voice slots. |
| Mono | Single voice. New notes retrigger the envelope and snap to the new slice. |
| Legato | Single voice. New notes do NOT retrigger the envelope. Slice mode still snaps phase; Pitch mode preserves phase. |
| Retrigger | Same-note retriggering hard-resets the voice. Different-note plays behave like Mono. |
Play mode (MODE)
| Slice | Each note plays one slice, mapped from ROOT upward. |
| Pitch | The whole sample is played, pitched by the note relative to ROOT. START / END knobs define the region. |
Loop mode (LOOP)
| Off | One-shot. Voice plays from start to end of region, then fades gracefully. |
| On | Loop on. Playback wraps from end back to a loop-back point with crossfade. LEN knob sets how much of the region is looped. |
Recording
Three rec modes
| HOLD | Recording active while REC button (or CV gate) is held. Up to ~4 s ceiling. |
| FIXED | REC press starts a fixed-length capture defined by LEN knob. |
| Q | Quantized. Capture arms on REC, starts/ends at transport bar boundaries. |
Recording over an existing sample
Pressing REC while a sample is loaded and voices are playing enters “recording-live” mode: the new capture goes into a separate buffer while active voices keep playing the old content. When recording finalizes, the new content swaps in atomically and active voices continue seamlessly via a per-voice fade-in that hides the buffer transition.
Pro tip: Combine cv_gate_rec with a slow sequencer pattern (e.g., every 4 bars) for evolving sample mangling — the device keeps playing while recapturing audio underneath.
Back panel & CV
Audio I/O
| IN L / R | Stereo audio input — source for recording. |
| OUT L / R | Main stereo mix output — all voices, post-pan and degradation. |
| OUT V1 / V2 / V3 | Per-voice direct outputs — no pan, no degradation. |
Gates and triggers
| REC | Rec gate — rising edge starts recording. |
| CLR | Clear gate — rising edge clears the sample. |
| MUTE | Mute gate — rising edge or level > 0.5 mutes the device. |
| STUT | Stutter engage — gate high = stutter active. |
| GATE / NOTE | Sequencer pair — pitch + gate. Auto-routes from any Reason sequencer. |
Slice and key
| SLICE | Slice select — 0..1 mapped to slice 1..N. |
| SLICES (v3.2) | Force slice count — 0..1 mapped to 1..16. Overrides auto/manual modes. |
| START / END | Additive mod to pitch-region START / END knobs. |
Modulation
| PORTA | Additive mod to portamento time. |
| SPEED | Additive mod to playback speed. |
| REV | Reverse — toggle or level (above 0.5 = reverse). |
| LEN | Additive mod to loop length. |
| ATK / REL | Additive mods to envelope attack/release. |
| WIN (v3.2) | Additive mod to stutter window size. Applied at stutter engage. |
| RATE (v3.2) | Additive mod to stutter rate. Live (modulates during stutter). |
CV outputs
| SLICES (out) | Active slice count normalized 0..1 (1 → 0.0, 16 → 1.0). |
| PLAYHEAD | Primary voice playback position, normalized 0..1. |
Combinator stacking
Furioso is designed to be stacked. Five instances in a Combinator weigh less than one Rubato, fit in 10 RU, and let you decompose a groove into independent voices.
Typical stacking patterns
| Drum kit | Five instances, each capturing a different drum hit. Independent slice counts. Use front-panel MUTE to drop voices in and out live. |
| Polyrhythm | Identical samples; different SLICES CV signals drive different slice counts. The shared audio is heard as cross-rhythms. |
| Layered timbre | Same source captured five times with different DEGR / pan / pitch regions. Builds a complex pad from identical input. |
| Sampler bank | Different slices per instance, Combinator Receive Notes routes keyboard ranges to instances. |
Furioso vs Rubato
Furioso and Splitfire Rubato are siblings, not alternatives. Rubato is the expressive flagship — 4 RU, 8 voices, 64 slices, ~25 s buffer, dual Tape + granular Time engine. Built for the producer working on a single delicate phrase. Furioso inverts the question: what if we accept hard constraints — short buffer, few voices, one engine, 2 RU — and design for stacking? Answer: a different instrument that serves a different musical need. A producer working on a vocal chop reaches for Rubato; the same producer reaching for five drum voices in a Combinator reaches for Furioso. Both are polished to their purpose.
| Quick Reference | 1-2 page card. Get playing in 2 minutes. |
| In-Depth Manual | Exhaustive technical reference. Every control, every CV, every behavior. Includes a “pro tips” chapter for advanced workflows. |
| doodov .dev / Reason store | Latest news, patches, and tutorials. |
Documents / Resources
 | 3465 Furioso |
References
- User Manualmanual.tools