Pluck - Synthesizer 2hp - Free user manual and instructions

Product Type	Eurorack Synthesizer Module
Brand	2hp
Model	Pluck
Width	2 HP (10.16 mm)
Height	3U (128.5 mm)
Depth	42 mm (including power header)
Weight	Approx. 30 g
Power Consumption	+12V: 30 mA, -12V: 10 mA
Power Connector	10-pin Eurorack ribbon cable (shrouded)
Audio Output	1 mono output (3.5 mm TS jack)
CV Inputs	1 pitch CV input (1V/octave), 1 trigger input
Controls	Tone knob, Decay knob, Brightness trimmer on back
Synthesis Type	Physical modeling (plucked string)
Polyphony	Monophonic
Key Features	Karplus-Strong algorithm, adjustable tone and decay, low power consumption
Materials	PCB, aluminum front panel
Maintenance	Keep dry, clean with soft dry cloth, avoid solvents
Safety	Only install in a powered Eurorack case, never hot-plug, observe polarity
Spare Parts & Repairability	No user-serviceable parts; contact 2hp for repairs
General Information	Designed for Eurorack modular synthesizer systems

Frequently Asked Questions - Pluck 2hp

What is the 2hp Pluck?

The 2hp Pluck is a Eurorack synthesizer module that generates plucked string sounds using physical modeling (Karplus-Strong algorithm). It is a monophonic voice with CV control over pitch and a trigger input.

How do I power the Pluck?

Connect the included 10-pin ribbon cable to a standard Eurorack power bus. Ensure the red stripe aligns with -12V. The module draws 30 mA on +12V and 10 mA on -12V.

What are the controls on the Pluck?

The front panel has four knobs: Tone adjusts brightness/filter, Decay controls the length of the note, and two trimmers on the back: Brightness and Pitch Range.

How do I connect audio from the Pluck?

The Pluck has a single 3.5mm mono TS output labeled 'Out'. Connect it to a mixer, VCA, or audio interface. The output level is modular-level (typically 10Vpp).

What CV inputs does the Pluck have?

It has two inputs: Pitch CV (1V/octave) to control the note frequency, and Trigger to excite the string. Both accept 0-5V or 0-10V signals.

Can the Pluck be used polyphonically?

No, the Pluck is strictly monophonic. It produces one note at a time. For polyphony, multiple Pluck modules or a different approach is needed.

How do I tune the Pluck?

Use the Pitch Range trimmer on the back to adjust the overall pitch scaling. Apply a 1V CV and measure the output frequency with a tuner, then adjust until octaves are accurate.

What if I get no sound from the Pluck?

First check power connections and ensure the module is receiving both +12V and -12V. Verify that the trigger input is receiving a gate/trigger signal (at least 5V). Turn the Tone and Decay knobs fully clockwise. If still silent, check audio cable and output mixer.

How do I maintain the Pluck module?

Keep the module dry and dust-free. Clean the front panel with a soft, dry cloth. Do not use liquids or solvents. Avoid exposure to extreme temperatures or humidity.

Is the Pluck repairable by the user?

The Pluck has no user-serviceable parts. Do not attempt to open or modify the module. For repairs, contact 2hp or an authorized service center.

USER MANUAL Pluck 2hp

Contents

Description 3

Installation 4

Specifications 4

Diagram 5

Functional Overview 6

1. Trig 6
2. Damp 6

2a. Damp Knob 6
2b. Damp CV 6

1. Decay 7

3a. Decay Knob 7
3b. Decay CV 7

1. V/Oct CV 7
2. Pitch Knob 7
3. Output 8

6a. Output LED 8
6b. Output 8

Description

Pluck is a Karplus-Strong Algorithm based string synthesizer with an expressive range of sounds. Dial in the decay time and dampening controls to transform a harp into a grungy half-strung bass. Four voice polyphony allows for long resounding melodies and harmonies to be created with only a single module.

• Four Voice Polyphony
• Karplus-Strong Algorithm based implementation
  • 1V/Octave tracking

Installation

To install, locate 2 HP of space in your Eurorack case and confirm the positive 12 volts and negative 12 volts sides of the power distribution lines. Plug the connector into the power distribution board of your case, keeping in mind that the red band corresponds to negative 12 volts. In most systems, the negative 12 volt supply line is at the bottom. The power cable should be connected to the module with the red band facing the front of the module.

Specifications

• Size: 2 HP
• Depth 42mm
  • Current Consumption:
• +12V: 83.45mA
• -12V: 4.5mA

Diagram

1.

2.

3.

4.

5.

6.

Functional Overview

1. Trig

Trigger input will cause a new note to be created with the current state of the knobs and CVs.

Four voices can be synthesized at once, and the oldest will be replaced when a new trigger is detected.

2. Damp

Changes the size of the string independent of pitch, dampening harmonics, and changing the tone of the output.

This only affects the generation of new notes.

2a. Damp Knob

When fully left the string will be as small as possible, dampening the most harmonics.

When fully right the string will be as large as possible increasing the harmonic content of the string.

2b. Damp CV

Bipolar CV is added to the knob position.

Input range: -5V to 5V

3. Decay

Sets the duration of the pluck sound for new notes that are generated.

The duration of the note will also have an effect on the harmonics produced, and for how long they will sound.

This only affects the generation of new notes.

3a. Decay Knob

When fully left the new note will be the shortest possible.

when fully right the new note will be the longest possible.

3b. Decay CV

Bipolar CV is added to the knob position.

Input range: -5V to 5V

4. V/Oct CV

1V/Octave input added to the pitch knob position.

5. Pitch Knob

Sets the fundamental frequency of the string sound.

The pitch control remains active for the most recently generated note providing the opportunity for vibrato, slew, and easier tuning while a note is ringing out.

6. Output

6a. Output LED

Visualization of the amplitude of the output.

6b. Output

10Vpp audio output signal