Magneto

Strymon 28HP
DELAY REVERB SAMPLER EFFECTS CLOCK

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Stereo four-head dTape echo, looper, phrase sampler and spring reverb. Independent playback-level and feedback per head, phase-aligned clock outs per head, pitch-quantized self-oscillation.

Patch Ideas · 10

★ Clock-locked quarter-note delay
ECHO mode · HEADS: EVEN · CLK IN from sequencer master clock at quarter notes · REPEATS ~50% · WET ~noon · all four heads at equal level · four rhythmic echoes (16th, 8th, dotted-8th, quarter) locked to the sequencer · use CLK 4 OUT as a slower sub-clock elsewhere
▸ Show diagram
Patch diagramPatch diagram with 5 modules and 5 connections. Modules: Magneto, Clock, Source, Output, Drums. Signals: 3 audio, 2 clock.MagnetoClockSourceOutputDrumsMode: ECHOHeads: EVENRepeats: ~50%Playback 1-4: equalCLK INclkLEFT INaudioLEFT OUTaudioRIGHT OUTaudioCLK 4 OUTclkOutclkOutaudioLaudioRaudioClockclk11. sub clockaudioclock
★ Tape oscillator voice
no input · SPEED/PITCH CCW · REPEATS 100% · tap TAP once to prime oscillation · hold TAP to enter Pitch Quantize (chromatic) · play sequencer 1V/oct into SPEED CV · self-oscillating Magneto becomes a scale-quantized sine voice with tape coloration
▸ Show diagram
Patch diagramPatch diagram with 3 modules and 2 connections. Modules: Magneto, Sequencer, Output. Signals: 1 audio, 1 pitch.MagnetoSequencerOutputMode: ECHORepeats: 100%Speed: CCWPitch Quantize: Chromatic (hold TAP)Wow & Flutter: tasteSPEED1v/octLEFT OUTaudioPitch1v/octLaudioaudiopitch
Zero-latency sub bass
HEADS: SHIFT · PAN: center · mute PLAYBACK 1/2/4 · PLAYBACK 3 ~noon (head 3 = -1 oct in SHIFT) · send note gate into RESTART CV · mono synth into LEFT IN · get tight zero-latency -1 octave under the dry signal
▸ Show diagram
Patch diagramPatch diagram with 4 modules and 3 connections. Modules: Magneto, Synth, Keyboard, Output. Signals: 2 audio, 1 gate.MagnetoSynthKeyboardOutputHeads: SHIFTPlayback 3: ~noonPlayback 1,2,4: 0Dry: ~noonLEFT INaudioRESTARTgateLEFT OUTaudioOutaudioGategateLaudio11. realign SHIFT pointersaudiogate
Phrase sampler re-trigger
SAMPLE mode · tap TAP to record a phrase · tap again to end · patch CLK 4 OUT back into RESTART CV · sample re-triggers continuously at its own loop length — free granular bed
▸ Show diagram
Patch diagramPatch diagram with 3 modules and 4 connections. Modules: Magneto, Source, Output. Signals: 3 audio, 1 trigger.MagnetoSourceOutputMode: SAMPLELEFT INaudioRESTARTtrigCLK 4 OUTtrigLEFT OUTaudioRIGHT OUTaudioOutaudioLaudioRaudio11. continuous re-triggeraudiotrigger
★ Sound-on-sound looper
LOOP mode · FEEDBACK 4 ON (required for loop playback) · PLAYBACK 4 ~noon · REPEATS ~70% for evolving layers · tap TAP to splice in, tap to splice out and begin playback · layer new material on top each pass
▸ Show diagram
Patch diagramPatch diagram with 3 modules and 3 connections. Modules: Magneto, Source, Output. Signals: 3 audio.MagnetoSourceOutputMode: LOOPFeedback 4: ONPlayback 4: ~noonRepeats: ~70%LEFT INaudioLEFT OUTaudioRIGHT OUTaudioOutaudioLaudioRaudioaudio
External FX in feedback loop
ECHO mode · patch SEND → external filter or reverb → RETURN · REPEATS ~60% · the filter now colors every repeat pass (not just the output) — repeats progressively band-limited, darkened or resonant as they decay
▸ Show diagram
Patch diagramPatch diagram with 4 modules and 4 connections. Modules: Magneto, Filter, Source, Output. Signals: 4 audio.MagnetoFilterSourceOutputMode: ECHORepeats: ~60%LEFT INaudioRETURNaudioSENDaudioLEFT OUTaudioInaudioOutaudioOutaudioLaudio11. external feedback insertaudio
Dying tape stop
TAPE AGE CW · CRINKLE CW · WOW & FLUTTER CW · gate into PAUSE CV (latch) · hold TRANSPORT+PAUSE and turn PLAYBACK 4 to set slowdown time · gate high pauses tape with a long mechanical spin-down
▸ Show diagram
Patch diagramPatch diagram with 4 modules and 3 connections. Modules: Magneto, Source, Gate, Output. Signals: 2 audio, 1 gate.MagnetoSourceGateOutputTape Age: CWCrinkle: CWWow & Flutter: CWLEFT INaudioPAUSEgateLEFT OUTaudioOutaudioOutgateLaudioaudiogate
Dual split: mono delay + spring
DIP S2 ON (rear) · LEFT IN/OUT acts as a mono 4-head delay · RIGHT IN/OUT is an independent mono spring · run drums through LEFT for tape echo and vocal through RIGHT for spring — two unrelated FX from one module
▸ Show diagram
Patch diagramPatch diagram with 4 modules and 4 connections. Modules: Magneto, Drums, Vocal, Output. Signals: 4 audio.MagnetoDrumsVocalOutputDIP S2: ON (dual split)LEFT INaudioRIGHT INaudioLEFT OUTaudioRIGHT OUTaudioOutaudioOutaudioDrum FXaudioVocal FXaudio121. mono delay2. mono springaudio
Multi-tap rhythm generator
ECHO + EVEN · CLK 1 OUT → drum 1 trigger · CLK 2 OUT → drum 2 · CLK 3 OUT → hat · CLK 4 OUT → kick · incoming CLK IN at quarter notes becomes four locked subdivisions driving a four-voice rhythm, phase-aligned to the source clock
▸ Show diagram
Patch diagramPatch diagram with 6 modules and 5 connections. Modules: Magneto, Clock, Drum1, Drum2, Hat, Kick. Signals: 4 trigger, 1 clock.MagnetoClockDrum1Drum2HatKickMode: ECHOHeads: EVENCLK INclkCLK 1 OUTtrigCLK 2 OUTtrigCLK 3 OUTtrigCLK 4 OUTtrigOutclkTrigtrigTrigtrigTrigtrigTrigtrig12341. 16th2. 8th3. dotted 8th4. quartertriggerclock
Ambient scrub pad
ECHO · PAUSE engaged · SPEED/PITCH slowly swept by LFO · ~1 foot of tape rescrubs as a drone · add WET, CRINKLE, SPRING CW for cavernous scrub pad · dry source stays silent (recording paused)
▸ Show diagram
Patch diagramPatch diagram with 4 modules and 4 connections. Modules: Magneto, LFO, Source, Output. Signals: 3 audio, 1 cv.MagnetoLFOSourceOutputMode: ECHOPaused: Spring: CWCrinkle: CWLEFT INaudioSPEEDcvLEFT OUTaudioRIGHT OUTaudioOutcvOutaudioLaudioRaudio11. scrubaudiocv

Behaviors

Echo / Loop / Sample modes MODES button

ECHO: four playback heads + one record head, four-tap delay. LOOP: head 4 becomes the sound-on-sound loop head, heads 1–3 remain delays of the incoming signal; FEEDBACK 4 must be ON for loop to play. SAMPLE: head 4 becomes phrase-sampler playhead, triggered by RESTART; tap to record, tap again to stop, third tap clears.

Self-oscillation as oscillator SPEED/PITCH CCW · REPEATS 100% · brief tap

Tape loop collapses into a high-quality sine. Press INFINITE to lock the pitch; SPEED still responds as 1V/oct over ~6 octaves (combining SPEED knob range with SPEED CV ±3V). Tape-mechanics knobs color the oscillation; an input signal cross-modulates it.

Zero-latency suboctave SHIFT head mode + GATE to RESTART

SHIFT mode sets head 3 to half-speed (-1 octave). Sending a note gate to RESTART CV realigns the SHIFT pointers on every note-on, yielding a tight -1 octave from head 3 with no perceivable latency. Level via PLAYBACK LEVEL 3.

Pitch quantize scales hold TAP

Restricts SPEED/PITCH to musical intervals across 15 scales (Pentatonic, Minor Blues, modes, Harmonic Minor, Whole Tone, Harmonic Series, Chromatic). SPEED CV is quantized to semitones. Hold TRANSPORT and turn SPEED/PITCH to scroll scales; FEEDBACK/TRANSPORT LEDs show selection.

Phase-aligned clock outs CLK IN patched

CLK 1–4 OUT emit 50%-duty clocks at each head's rhythmic subdivision and stay phase-aligned with incoming CLK IN or TAP. In EVEN: 16th/8th/dotted-8th/quarter. In TRIPLET: triplet variants. In SHIFT: 333ms/500ms/2000ms/1000ms at 1s quarter. CLK 4 becomes loop-length clock in LOOP/SAMPLE.

Custom per-head panning PAN = CENTER · hold FEEDBACK N + turn PLAYBACK LEVEL N

With PAN switched to CENTER, holding a head's FEEDBACK button while turning that head's PLAYBACK LEVEL knob sets its pan (L / center / R). Lets any stereo placement of the four heads be dialed by hand; all-centered produces a psychoacoustic stereo image.

Send/Return loop cable in SEND and RETURN

SEND outputs summed input + delay repeats pre record-head; RETURN feeds back into record head. Patching both inserts external FX in the feedback path — summed to mono inside Magneto, though the dry output retains stereo. Reverb / filter / waveshaper here for evolving delay feedback.

Dual split mode DIP S2 ON (rear)

Splits Magneto into a mono 4-head tape delay on LEFT IN/OUT and an independent mono spring reverb on RIGHT IN/OUT. Two unrelated effects in one module; requires rack pull to toggle the DIP.

Momentary vs latch transport power up while holding a transport button

Each transport function (INFINITE, REVERSE, RESTART, PAUSE) can be set independently to momentary (red flash) or latch (green flash) at boot. CV inputs follow the same assignment (gate vs trigger). RESTART is always trigger-only.

Pause with mechanical slowdown PAUSE engaged

Stops tape with mechanical slowdown/startup ramp. Ramp time is set by PLAYBACK LEVEL 4 while TRANSPORT+PAUSE are active (both red). With TAPE AGE + CRINKLE high this produces a convincing dying-tape stop.

Scrub audio when paused PAUSE on · move SPEED/PITCH

A ~1-foot scrub buffer of recent tape is addressable by the SPEED/PITCH knob while paused. Length of scrub material depends on the speed at the moment of pause — slower speeds capture more audio in the buffer.

Controls

Global DRY Level of unprocessed input sent to output. Stereo-preserving.
Mono in at LEFT appears at both outputs
Global REC LVL Level into record head. Drives tape saturation.
LED: blue = muted · green = clean · amber = onset · red = heavy saturation
Global SPEED / PITCH True varispeed tape speed. Controls delay time and pitch of repeats.
8:1 range · noon = normal · max = 2x (highest fidelity) · min = 1/4x
Global WET Overall delay signal level sent to output.
Post playback-level knobs
Global REPEATS Feedback amount for heads with FEEDBACK ON. At 100% enters self-oscillation.
Feedback summed from feedback-enabled heads only
Per head PLAYBACK LEVEL 1–4 Individual level of each of the four playback heads.
Zero mutes output of that head but head still feeds back if FEEDBACK on
Per head FEEDBACK 1–4 Buttons. Enable feedback of each head back to the record head.
Green LED when enabled · Head 4 must be ON for Loop playback
Global HEADS Three-way switch: EVEN / TRIPLET / SHIFT head spacing.
EVEN: 16th/8th/dotted-8th/quarter · TRIPLET: triplet subdivisions · SHIFT: +oct+5th / +oct / -oct / quarter at varispeed
Global PAN Preset stereo panning of heads: LRRL / CENTER / LRLR.
CENTER enables custom per-head panning via FEEDBACK-hold + PLAYBACK LEVEL
Global MODES Button selects ECHO / LOOP (sound-on-sound) / SAMPLE (phrase).
Green = Echo · amber = Loop · red = Sample
Global TAP Two taps set head-4 delay time. Hold to enter PITCH QUANTIZE mode.
50ms–15s tap range · amber LED = quantize active
Tape mechanics LOW CUT High-pass on the echo repeats.
Max: high-passed magnetic-drum response with peak
Tape mechanics TAPE AGE Tape bandwidth / treble loss.
Min: fresh tape · max: mildly peaking, atmospheric
Tape mechanics CRINKLE Tape irregularities: friction, creases, splices, contaminants.
Min: clean · max: mangled
Tape mechanics WOW & FLUTTER Amount of mechanical speed fluctuation.
CCW: perfectly tuned · CW: ailing transport
Global SPRING Output mix of integrated spring reverb tank. DRY and WET feed its input.
Independent send path
Global TRANSPORT Enters transport mode: buttons 1–4 become infinite / reverse / restart / pause.
Momentary/latch per-button selectable by power-up + hold

I/O

IN · 16

  • LEFT IN modular level AUDIO
    Left audio input · use alone for mono
    NORM → right input (mono fanout)
  • RIGHT IN AUDIO
    Right audio input
  • SEND
    Insert return point — not an input; see RETURN
  • RETURN modular level
    External feedback-loop return, fed to record head after SEND
  • CLK IN 0–5V rising edge · 50ms–15s period CLK
    Clock to set delay time in quarter notes
  • REC GATE 0–5V rising edge GATE
    Toggles record head on/off · mutes input to delay line
  • SHIFT 0–5V rising edge
    Toggles SHIFT head mode on/off
  • INFINITE 0–5V rising edge
    Toggles infinite hold (disables record head, loops last delay cycle)
  • FORWARD/REVERSE 0–5V rising edge
    Toggles tape direction
  • RESTART 0–5V rising edge GATE
    Engages restart transport · trigger-only regardless of settings
  • PAUSE 0–5V rising edge
    Toggles pause transport · speed of slowdown set by PLAYBACK LEVEL 4
  • TAP 0–5V rising edge · 10ms–15s range CV
    CV-controlled TAP function. Follows ECHO/LOOP/SAMPLE assignment of TAP button
  • SPEED -3V to +3V · 1V/oct CV
    Continuous CV for SPEED/PITCH · 1V/oct calibrated
  • WET CV -5V to +5V CV
    Modifies WET level · sums with knob
  • REPEATS CV -5V to +5V CV
    Modifies REPEATS · sums with knob
  • SPRING CV -5V to +5V CV
    Modifies SPRING level · sums with knob

OUT · 7

  • LEFT OUT modular level AUDIO
    Left audio output · sums mono if RIGHT OUT unpatched
  • RIGHT OUT AUDIO
    Right audio output
  • SEND modular level
    Summed input + repeats, pre record head · external FX loop send
  • CLK 1 OUT 0–5V · 50% duty · head-specific subdivision CLK
    Phase-aligned clock of playback head 1
  • CLK 2 OUT 0–5V · 50% duty CLK
    Phase-aligned clock of head 2
  • CLK 3 OUT 0–5V · 50% duty CLK
    Phase-aligned clock of head 3
  • CLK 4 OUT 0–5V · 50% duty CLK
    Phase-aligned clock of head 4 · becomes loop/sample length clock in LOOP/SAMPLE modes