Sounds like: A lead that wails up and down like a siren.
A wailing, continuously rising-and-falling siren lead — a slow triangle LFO sweeps the oscillator pitch back and forth over a wide range, the whole character coming from the modulation depth and speed rather than the filter or envelope.
Open this patch in the interactive PatchpadDigitone II's FM TONE machine has no pitch destination for its LFOs at all (the manual's Appendix D lists only SYN data-entry knobs, FILTER, AMP and FX parameters). The real way to get a smooth, wide pitch sweep is a machine with a tuning knob: WAVETONE's TUN1 is in cents and is a valid destination, so MOD page 1's slow Triangle LFO on TUN1 gives a genuine rising-and-falling wail (LEV2 0 keeps it to one oscillator, MOD OFF). MODE FREE keeps the LFO running continuously, so overlapping notes drift in phase rather than repeating an identical shape. DEP and SPD are starting points — the depth in cents isn't documented, so raise DEP until the wail reaches the width you want.
Syntakt's LFO destination list (manual Appendix C) has no direct pitch option — audio-track destinations are the machine's own parameters 1-8, FILTER, AMPLIFIER and the other LFO. Pitch modulation therefore targets the machine's TUNE knob (parameter 1 on SY RAW), a genuinely wide-range semitone-based parameter, so a wide DEP gives a full, dramatic wail. (SY RAW's TUNE base value is a register starting point — see conventions.md on TUNE semantics.)
Live control: the Mod Wheel speeds up LFO 2 through Mod Matrix slot 1; ride the panel LFO 2 Depth knob (Oscillator section) for the wail width.
Osc 1 is BasicWaves with Morph at 50 (pure sawtooth): the Morph knob runs from a square (0) through a sawtooth (50) to a double sawtooth an octave up (100), Sym only changes the pulse width below 50, and Sub adds a sine an octave down (0 here). LFO 1 runs a Tri wave at 0.5 Hz. Mod Matrix: the LFO 1 row to the Pitch 1+2 column at +60. MiniFreak's LFOs have no fixed destination — routing to pitch has to go through the real Modulation Matrix. Values are on MiniFreak's native 0-100 scale.
M1's real LFO mode routed to DEST CV1 (pitch, in semitones — a documented real destination) is a direct, literal pitch-siren implementation, no approximation needed.
LFO 1/2 are pre-wired to Filter/Amp, not pitch, so this uses free-assign LFO 3 routed through the real Mod Matrix. Mod Matrix slots are Source, Destination (module then parameter) and Depth, on a -128 to +128 scale.
Novation Summit and Dreadbox Typhon both have a real, direct pitch-modulation route (a hardwired LFO2 Depth knob, or a documented CV1 destination). Digitone II and Syntakt LFOs have no pitch destination, so each targets a real tuning knob instead: Digitone II's WAVETONE TUN1 (in cents) and Syntakt's machine TUNE. Arturia MiniFreak and ASM Hydrasynth Desktop reach pitch through the Mod Matrix; the exact matrix rows were not independently verified against each manual, so treat them as a starting point.