Tiptop Audio — MODFX FSU
Official Manual PDF (Tiptop Audio ModFx & FSU):
Tiptop Audio ModFx & FSU — Cheat Sheet
ModFx and FSU are 8hp digital multi-effects modules for Eurorack. Each module features 3 major effect banks, each with 8 programs, for deep but immediate modulation, filtering, chorus, distortion, glitching, and looper-style sound design.
Panel & Controls Reference
JACKS
| Jack |
Description |
Type |
Voltage Range |
| L IN |
Left Audio Input |
Audio Mono |
±5V expected |
| R IN |
Right Audio Input |
Audio Mono |
±5V expected |
| L (MONO) OUT |
Left / Mono Audio Output |
Audio Mono |
±5V typical output |
| R OUT |
Right Audio Output |
Audio Mono |
±5V typical output |
| CV 1 |
CV to first parameter (see below) |
CV Input |
0–5V (unipolar), ±5V safe |
| CV 2 |
CV to second parameter |
CV Input |
0–5V (unipolar), ±5V safe |
| CV 3 |
CV to third parameter |
CV Input |
0–5V (unipolar), ±5V safe |
| FIDELITY CV |
(Shared) Analog clocking (low-level control over DSP rate) |
CV Input |
0–5V |
MAIN CONTROLS
[BOTH MODULES — ModFX + FSU]
| Knob/Button |
Function |
Voltage Control |
| Rate |
Speed of LFO, modulation rate, playback speed, etc |
CV1 |
| Filter/Fdback |
Filter cutoff, feedback amount, tuning, or other function |
CV2 |
| Depth |
Depth of modulation, feedback, chorus range, etc |
CV3 |
| Fidelity |
DSP clock / LoFi effect / affects buffer length & character |
CV (label-specific) |
| Mix |
Dry/Wet balance (manual only) |
– |
| Bank Buttons (3) |
Select program banks (illuminated, labeled by mode) |
– |
| Program Select |
Push buttons to select one of 8 programs per bank |
– |
[FSU ONLY]
| Control (FSU) |
Function |
Voltage Control |
| Gain |
Output level (Distort bank), Record level (SOS bank) |
Replaces "Rate" in some modes |
| Drive |
Distortion/Input gain in Distort bank |
(sometimes replaces "Depth") |
[MODFX ONLY]
- No unique extra controls – all labeled as above according to effect.
BANKS AND EFFECTS
MODFX
- Chorus: 8 types (classic, ensemble, stereo, vibrato, random)
- Flanger/Karplus: stereo flange, tape/zero, Karplus-Strong, chord resonator, Haas panning
- Filter/Phaser: 12-stage phaser, bandpass LFO, tape/drive, tremolo pan, formant ping-pong, vowel/ahh
FSU
- Distort: tape saturation, bit crusher, clipper, rectifier, ring mod, freq shift (mono/dual)
- Glitch/Warp: random pitch, glitch chorus, varispeed, granular, grains w/ feedback
- Sound on Sound (Looper/Granular): dual head, dual pitch, chorus scrub, varispeed, panning, buffered degrade, frozen plate
Each bank has 8 programs; see manual for full parameter assignment per effect.
VOLTAGE/CV INPUTS (per function)
| Parameter |
Typical CV Range |
Effect (all banks/settings) |
| Rate/Gain |
0–5V unipolar |
LFO speed, playback speed, effect rate, gain input/output |
| Filter/Fdback |
0–5V unipolar |
Filter cutoff, feedback amount, Q, feedback level |
| Depth/Drive |
0–5V unipolar |
Amount of modulation, distortion, detune, pitch |
| Fidelity |
0–5V unipolar |
Lowers clock for lo-fi, longer buffers on loopers |
CV inputs typically expect 0–5V; -5V to +5V is tolerated but may invert or fold control ranges at extremes.
BUTTONS (MODFX/FSU)
- Bank Buttons: Choose current effects bank ([Chorus/Flanger/Filter] or [Distort/Glitch/SOS]).
- Program/Select: Illuminated selectors, change active program.
- SOS Shift/Hold: Hold to clear or reload SoS buffer (FSU only).
USING THE MODULE
- Power Up and Patch Audio:
- Patch L/R IN to your audio source and OUT to mixer/speakers.
- Bank & Program Select:
- Use illuminated buttons to pick an effect bank, then select desired program.
- Adjust Main Controls:
- Rate, Filter/Fb, Depth, Mix (and Fidelity) shape the effect (see per-effect mapping, many are intuitive).
- Patch CV for Modulation:
- Send LFO, Envelope, Sequencer, etc. to any CV input to animate parameters in real time. 0–5V recommended.
- Experiment with Fidelity CV:
- Lower audio fidelity for lo-fi, pitch, and buffer time changes.
- Set Mix:
- For most Distort, Looper, Glitch programs, set to 100% wet. For Choruses/Flangers, try 50/50 or 100% wet.
- Monitor LEDs/Buttons:
- Bank selection will be color/LED-indicated.
QUICK TIPS
- FSU Looper (SoS) buffer can clear: Change preset for reset, or hold SoS button to clear in place.
- Karplus/Flanger likes short, percussive inputs.
- Vowel and formant programs want harmonically rich sources (saw, square, etc).
- Fidelity knob or CV can radically transform the feel of most effects.
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