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Basic data
Name
Roland VT-3
Category
11) Voice / vocal processors / vocoder
Type
VOICE_TRANSFORMER_/_VOCODER
Specimen
A
Inventory tag
HW-2024-SY-VT3-001
Condition
OK
Physical parameters
Dimensions (mm)
—
Dimensions (inch)
—
Weight
—
Format
—
Material
—
Manufacturing (Period)
—
Manufacturer
—
Power
Voltage
12V DC
Current (typical)
0.6 A
Current (max)
0.8 A
Polarity
center +
Connector
2.1mm barrel
AC/DC
DC
Internal/External
External
Note
It can run from USB, but I recommend external power for better audio quality.
Warning: Check the polarity of the source before connecting! Improper power supply will damage the device.
Firmware and serial number
Serial number
2K654321B
FW version (current)
2.01
Check date
2026-02-15
Previous version
2.00
Bootloader
1.2
Update Link
Backup File
MANUALS / Roland-vt-3-v2.01.bin
Quick Summary
Professional voice transformer with vocoder, ideal for vocal effects and harmonizing.
Product Description
—
Features and functions
- Professional voice transformer with clean sound - ideal for live and studio
- Integrated vocoder with 16 channels - speech conversion to melody
- Harmonizer - automatic generation of harmonies (2-4 votes)
- Digital effects - delay, reverse, chorus, flanger, distortion
- Flexible audio input: XLR combo jack (MIC + LINE mode)
- Balanced XLR + 6.3 mm TRS outputs - professional quality
- Headphone monitoring - independent 6.3 mm out
- Expression pedal input - real-time control effects
- USB audio interface - 2 in / 2 out (class compliance)
- MIDI IN / OUT: DIN 5-pin - CC Control and Change Program
- MIDI controlable - all effects mapable
- 48 kHz digital processing - high sound quality
- Low latency - < 6ms USB mode, < 1ms internal
- Preset system - save your own settings
- Compact design - ideal for transformations and live peformance
Primary I/O (quick orientation)
| Domain | Inputs | Outputs | Note |
|---|---|---|---|
| Audio Input | XLR + TRS 6.3mm (combo - choose one) | — | MIC IN: -50 to -20 dBu (mic sensitivity), LINE IN: -20 to + 4 dBu |
| Audio Output | — | Balanced OUT L / R (6.3 mm TRS) | + 4 dBu (professional level), impedance 100 Calculation |
| Headphones | — | 6.3 mm TRS (stereo) | Volume control on the device |
| Pedal Input | 1 / 4 "TS (expression pedal) | — | You can map to different parameters effects |
| MIDI | DIN 5-pin | DIN 5-pin | MIDI CC for effect control, Change Program for presets |
| USB | USB Type-B | Audio + MIDI | Audio interface mode (2 in / 2 out), class compliance |
Controls
FRONT / TOP (user control)
- Input Selector: MIC / LINE (combo jack switch)
- Mic / Line Level: 0-100 (potentiometer)
- Harmony: 0-10 (harmonization intensity)
- Effect Selector: Vocoder, Doubler, Delay, Reverb...
- Effect Parameter 1-4 (4 × yaw knobs)
- Volume: Headphone OUT level
- Pedal IN: Expression pedal port (1 / 4 "TS)
Service / hidden elements
- RESET: under the front mask, press the pencil
- MIDI IN / OUT DIN connectors: rear panel
Connectors and connections
Connector matrix
| Interfaces | IN | OUT | Spec / note |
|---|---|---|---|
| Audio Input | XLR + TRS 6.3mm (combo - choose one) | — | MIC IN: -50 to -20 dBu (mic sensitivity), LINE IN: -20 to + 4 dBu |
| Audio Output | — | Balanced OUT L / R (6.3 mm TRS) | + 4 dBu (professional level), impedance 100 Calculation |
| Headphones | — | 6.3 mm TRS (stereo) | Volume control on the device |
| Pedal Input | 1 / 4 "TS (expression pedal) | — | You can map to different parameters effects |
| MIDI | DIN 5-pin | DIN 5-pin | MIDI CC for effect control, Change Program for presets |
| USB | USB Type-B | Audio + MIDI | Audio interface mode (2 in / 2 out), class compliance |
Latency and jitter
Clock sources
USB audio engine
Clock IN/OUT format
48 kHz (fixed), 24-bit
Typical latency
5.8 ms @ 48 kHz (USB mode), < 1 ms (internal)
Jitter spec
< 0.1% THD (digital jitter negli givable)
Buffer support
256, 512, 1024 samples (USB mode)
Impedance and signal levels
Line Level (dBu)
+ 4 dBu (OUT), -20 to + 4 dBu (MIC / LINE IN)
Mic In level
-50 to -20 dBu (type condenser, unbalanced)
Output Impedance
100 Calculation
Input Impedance
10 kCalculation (MIC), 2 kCalculation (LINE)
THD
< 0.05% @ 1 kHz (analog section)
Frequency Range
50 Hz - 20 kHz ± 3 dB
Other Specifications (from metadata.specifications)
| Key | Value |
|---|---|
| specifications.nominal _ levels.mic _ in | -40 to -12 dBu (variable) |
| specifications.nominal _ levels.out | -10 dBu |
| specifications.input _ impedance.mic _ in _ read | 4.4 kCalculation (XLR balanced) |
| specifications.input _ impedance.mic _ in _ front | 2.2 kCalculation (mini stereo with plug-in power) |
| specifications.output _ impedance .out | 1 kCalculation |
| specifications.output _ impedance.phones | 24 Calculation of the total number of units |
| specifications.memory.scene _ memory | 3 scenes |
| specifications.voice _ changer.pitch | Pitch shift |
| specifications.voice _ changer.formant | Formant shift |
| specifications.voice _ changer.robot | Robot voice |
| specifications.voice _ changer.character | Character processing |
| specifications.character _ types | DIRECT (no processing), AUTO PITCH1 (automatic pitch detection), AUTO PITCH2 (alternative auto pitch), VOCODER (channel vocoder), SYNTH (synthesizer mode), LEAD (lead voice effect), BASS (bass voice effect), MEGAPHONE (megaphone simulation), RADIO (radio transmission simulation), SCATTER (scaled / distressed voice) |
| specifications.effectsreverb | Algorithmic reverb |
| specifications.effectschorus | Chorus effect |
| specifications.effects.delay | Delay effect |
| specifications.effects.flanger | Flanger effect |
| specifications.effectsdistortion | Distortion effect |
| specifications.controllers.pitch _ slider | Pitch slider |
| specifications.controllers.formant _ slider | Formant slider |
| specifications.controllers.mix _ balance _ slider | Mix Balance Slider |
| specifications.controllers.reverb _ slider | Reverb slider |
| specifications.controllers.character _ knob | Character knob |
| specifications.controllers.robot _ button | Robot button |
| specifications.controllers.bypass _ button | Bypass button |
| specifications.controllers.phantom _ switch | Phantom power switch |
| specifications.controllers.select _ switch | Input select switch |
| specifications.connectors.mic _ in _ reach | XLR type (balanced, phantom power: + 48V, 10mA max) |
| specifications.connectors.mic _ in _ read _ trs | 1 / 4-inch TRS phone type (balanced) |
| specifications.connectors.mic _ in _ front | Stereo miniature phone type (plug-in power) |
| specifications.connectors.phones _ jack | Stereo miniature phone type |
| specifications.connectors.out _ jacks | 1 / 4- inch phone type (two jacks: L / R) |
| specifications.connectors.usb _ port | USB Type-B (Audio interface) |
| specifications.connectors.pedal _ jack | 1 / 4-inch phone type (expression pedal input) |
| specifications.connectors.dc _ in _ jack | DC IN jack (power input) |
| specifications.usb.function | Audio interface + MIDI |
| specifications.usb.audio _ channels | 2 in / 2 out |
| specifications.usb.bus _ power | Can be powered via USB (alternative to AC adapter) |
| specifications.power _ supply.options | AC adaptor or USB bus power |
| specifications.power _ supply.current _ draw | 380 mA |
| specifications.power _ supply.voltage | 12V DC (AC Adaptor) |
| specifications.dimensions.width _ mm | 210 mm |
| specifications.dimensions.width _ inches | 8-5 / 16 inches |
| specifications.dimensions.depot _ mm | 175 mm |
| specifications.dimensions.depot _ inches | 6-15 / 16 inches |
| specifications.dimensions.height _ mm | 57 mm |
| specifications.dimensions.height _ inches | 21 / 4 inches |
| specifications.dimensions.weight _ g | 690 g |
| specifications.indicator | Peak indicator |
| specifications.accessories _ included | User manual, Leaflet 'USING THE UNIT SAFELY', AC Adaptor |
| specifications.optimum _ approaches | Footswitch: BOSS FS-5L, FS-5U, Pedal switch: DP-2 |
Additional technical details
| Key | Value |
|---|---|
| No additional technical details | |
Typical routing
- Live vocal processing: VT-3 as an effect on voice during live set
• Microphone → XLR IN (VT-3)
• Select mode: Vocoder (for robotic effect) or Doubler (for multiharmony)
• OUT L / R → Monitor mix / PA
• Expression pedal → Intensity effect (e.g. Harmony depot) - Studio recording: USB audio interface in DAW (Ableton Live)
• Microphone → MIC IN (combo XLR)
• USB → PC / DAW (Ableton Live)
• In DAW: VT-3 appears as audio device (2 IN, 2 OUT)
• Upload raw vocal, then in post-production: harmonies, vocoder effects - Mastering chain: VT-3 in a mix as a bus effect
• Submix (vocal bus) → Audio OUT (VT-3) - analog path
• VT-3 choose Reverb or Delay etc.
• OUT L / R → MOTU 896 master input
Connection instructions: The examples below show typical signal flows in practice. For specific details (jitter, buffering), see section above.
SW / drivers
| Component | Windows | macOS | Linux | Note |
|---|---|---|---|---|
| No specific driver data; use the Documentation/Links section. | ||||
Custom firmware details
Author
—
FW family
—
Custom FW targets
- No explicit custom FW targets in metadata.
Custom CC mapping
| CC | Meaning |
|---|---|
| No custom CC mapping. | |
Custom FW global settings
| Settings | Meaning |
|---|---|
| No custom global settings. | |
Custom FW extended menu
| Item | Detail |
|---|---|
| No extended menu details. | |
Documentation and manuals
Manufacturer / Links
- Official site of manufacturer
- eBay - search Roland VT-3
- Aukro.cz - search Roland VT-3
- MusicyBazar.cz - search Roland VT-3
- MIDI.cz - search for Roland VT-3
- Kytary.cz - search for Roland VT-3
- Heureka.cz - search for Roland VT-3
- Gear4music.cz - search for Roland VT-3
- Muziker.cz - search Roland VT-3
Service log
| Date | Event | Who | Note |
|---|---|---|---|
| 2026-02-15 | FW update v2.01 | JPG | Fixed: Higher USB stability, better MIDI CC mapping |
| 2026-01-20 | XLR connector check | MK | Check status XLR connector - fine, no corrosion |
Presets / User banks
Storage type
Internal Flash (200 MB, 99 presets)
Number of banks
10 banks (10 presets per bank)
Current bank
Bank 3 (custom harmonies)
Backup File
PRESETTS / roland-vt-3-presets.syx
Export format
SYSEX
Note
Présets archivny v PRESETS / roland-vt-3-presets.syx for security
Notes / service / modifications
- Manual: MANUALS / Roland-vt-3-manual.pdf
- Excellent for live vocal effects (robotic harmonies, vocoder, reverb)
- Interoperability: MIDI CC for control from external MIDI controller (e.g. Novation Zero SL Mk2)
- Warning: combo XLR / TRS - check if mode is correctly selected (XLR for mic, TRS for line)
- Phantom power: + 48V available on XLR MIC IN rear panel for condensatory microphones
- USB bus power: Power only from USB, but external AC adapter is recommended for optimum audio quality
- The Commission therefore concludes that the aid is compatible with the internal market.