# 2hp — Pluck - [Manual PDF](../../manuals/2hp_Pluck.pdf) --- [Manual PDF](#) ## Module analyzed: Pluck Pluck is a **2HP Karplus-Strong string synth voice** designed for **melodic, plucked, string-like sounds**. From the manual, it is a **complete sound source** with: - **Trig input** - **Damp CV + knob** - **Decay CV + knob** - **1V/Oct input** - **Pitch knob** - **Audio output** - **4-voice polyphony** That means this module is especially good at creating: - plucked melodies - pseudo-harp and mallet lines - bass plucks - ringing chordal arpeggios - layered polyphonic trigger patterns from a single voice output --- ## What this module does musically Pluck uses a **Karplus-Strong algorithm**, which is essentially a synthesized string model. In practice, that gives you: - bright plucks - muted string tones - short percussive notes - longer resonant string sounds - bassy, dirty “half-strung” textures as the manual describes Because it has **1V/Oct tracking**, it can be used like a melodic oscillator/voice. Because it has a **Trig input**, it behaves more like a self-contained plucked instrument than a continuously droning oscillator. --- ## Key performance behavior from the manual A few details in the manual are very important for patching melodic material: ### 1. Trigger creates new notes Each incoming trigger creates a new note using the current settings of: - Pitch - V/Oct - Damp - Decay So the module “samples” those settings at note onset. ### 2. Four voice polyphony It can generate **up to four notes simultaneously**, and when a fifth trigger arrives, the **oldest voice is replaced**. Musically, this means: - overlapping melodies work well - arpeggios can smear into chord-like textures - fast note sequences can build harmonic clouds - long decay settings can create accidental harmony from monophonic trigger streams ### 3. Damp and Decay affect only new notes This is crucial. Per the manual, **Damp** and **Decay** only affect **newly generated notes**, not notes already ringing. That means you can: - sequence timbral variation per note - make each new pluck brighter/darker - make accents by increasing decay on certain steps - create evolving melodies where older notes retain their own character ### 4. Pitch knob remains active on the most recently generated note This is a very interesting detail. The manual says the pitch control remains active for the **most recently generated note**, allowing: - vibrato - pitch slew - easier tuning while a note rings So while older polyphonic voices stay where they were triggered, the newest note can still be “played” with the pitch control. --- # How to use Pluck for melodic components ## 1. Basic melodic voice This is the simplest patch. **Patch:** - Sequencer pitch CV -> **V/Oct** - Gate or trigger sequencer -> **Trig** - **Out** -> VCA, LPG, mixer, filter, or directly to output chain **Result:** A straightforward plucked melodic line. **Tips:** - Use shorter **Decay** for staccato lines - Use longer **Decay** for harp-like overlap - Use **Damp** lower for more muted tones - Use **Damp** higher for brighter, harmonically rich notes --- ## 2. Polyphonic arpeggio texture Since the module has **4-voice polyphony**, one sequencer can generate more than just a monophonic line. **Patch:** - Fast clocked pitch sequence -> **V/Oct** - Matching triggers -> **Trig** - Set **Decay** medium to long **Result:** As notes overlap, you get a shimmering arpeggiated texture that can imply chords. **Why it works:** Each trigger creates a new voice, and older voices continue ringing. With the right sequence, a simple melodic pattern becomes a harmonic bed. **Best use cases:** - ambient arps - generative melodic figures - pseudo-harp cascades - Berlin-school pluck lines --- ## 3. Bass plucks The manual specifically suggests it can move into “grungy half-strung bass.” **Patch:** - Low-register sequence into **V/Oct** - Trigger pattern into **Trig** - Lower **Damp** - Medium-short **Decay** **Result:** Short, punchy bass notes with string character rather than pure analog oscillator tone. **Variation:** Add CV to **Decay** so some notes sustain longer than others. This gives a more “played” bassline feel. --- ## 4. Humanized melodic phrasing with Damp CV Because **Damp CV** is bipolar and added to the knob position, you can animate tone on a per-note basis. **Patch ideas:** - Random stepped CV -> **Damp** - Slow sequencer row -> **Damp** - Accent CV -> **Damp** **Result:** Each note can be: - brighter - duller - tighter - more open This is extremely useful for making repetitive melodic lines feel expressive. **Musical application:** - brighter notes on accented beats - muted notes between accents - alternating timbre in ostinatos - pseudo-picking variation like a guitarist or harpist **Manual range:** - **-5V to +5V** --- ## 5. Dynamic note-length melody with Decay CV Decay is one of the best modulation points for musical phrasing. **Patch ideas:** - Accent lane from sequencer -> **Decay CV** - Random CV -> **Decay CV** - Slow LFO -> **Decay CV** - Euclidean accent pattern -> **Decay CV** **Result:** Some notes become short and dry, others bloom and ring. Because **Decay only affects new notes**, you can get very nuanced melodic articulation: - ghost notes - accents - phrase endings with longer sustain - occasional blooming harmonic tails This is one of the easiest ways to make Pluck feel “performed” rather than mechanically sequenced. --- ## 6. Chord illusion from a monophonic sequencer Even though there is only one V/Oct input and one trigger input, the polyphony allows chord-like results. **Patch:** - Send a melodic sequence with medium/long decay - Use repeated triggers and intervals in the sequence - Let notes overlap **Result:** You can imply chords with: - broken triads - 1-5-8 patterns - pedal-note figures - repeated upper chord tones over changing bass roots **Example sequence ideas:** - C, G, E, G - C, E, G, B - root, 5th, 9th, 3rd - octave displacement arpeggios Because 4 notes can ring at once, Pluck can behave almost like a mini chord resonator when sequenced this way. --- ## 7. Vibrato and expressive pitch movement The manual notes that the **Pitch knob remains active for the most recently generated note**. This means after triggering a note, you can manually perform: - slight vibrato - subtle pitch bends - tuning nudges - glides on the newest note **Musical use:** - expressive leads - live performance embellishment - bending the final note of a phrase - making a repeated pattern feel less rigid If you’re hands-on with the system, this is a strong performance feature. --- ## 8. Generative melody voice Pluck is a strong candidate for generative systems. **Patch:** - Random quantized CV -> **V/Oct** - Irregular trigger source -> **Trig** - Slow random voltage -> **Damp** - Another slow random voltage -> **Decay CV** **Result:** An evolving, self-playing plucked instrument with tonal and rhythmic variation. Because of the 4-voice overlap, even sparse generative triggers can create rich melodic/harmonic fields. --- # Best pairings with other Eurorack module types The manual only covers Pluck, but as a Eurorack musician, here’s how it works best with common companion modules to create melodic parts. ## Sequencer A sequencer is the most obvious partner. Use it to send: - **pitch CV** to V/Oct - **gate/trigger** to Trig - optional modulation lanes to Damp/Decay This gives you: - basslines - melodies - arpeggios - repeating motifs ## Quantizer If using random or unquantized CV, a quantizer before **V/Oct** keeps the output musical and scale-locked. Great for: - generative plucks - modal runs - harmonic consistency ## Trigger sequencer / Euclidean trigger source Since notes are initiated by triggers, rhythmic trigger design strongly shapes the melody. Use this for: - syncopation - ratchets - sparse note entries - polyrhythmic pluck patterns ## Modulation source LFOs, envelopes, random voltages, or sequencer CV lanes can animate: - **Damp** - **Decay** This adds phrasing and timbral movement. ## Filter Even though Pluck already has a strong timbral identity, a filter after the output can: - soften brightness - emphasize bass use - create motion with filter envelopes - place the sound better in a mix ## VCA / LPG Pluck already produces decaying notes, but a VCA or LPG afterward can still help: - shape overall dynamics - add accenting - shorten or gate the result further - create more percussive articulation ## Delay / Reverb Pluck excels with effects. Use delay/reverb to turn simple melodic figures into: - ambient string clouds - shimmering arpeggios - bell-like melodic trails - cinematic harmonic beds --- # Practical melodic patch recipes ## Patch 1: Harp arpeggio **Connections** - Sequencer CV -> V/Oct - Clocked trigger pattern -> Trig - Out -> Reverb **Settings** - Damp: high - Decay: medium-long - Pitch: tune to desired register **Result** Bright, sparkling plucked arpeggios with overlap. --- ## Patch 2: Muted ostinato **Connections** - 8-step sequencer -> V/Oct - Trigger sequencer -> Trig - Slow CV -> Damp **Settings** - Damp: lower range - Decay: short to medium **Result** A tight, repetitive melodic phrase with subtle tonal variation. --- ## Patch 3: Polyphonic pseudo-chords **Connections** - Arpeggiator or sequencer -> V/Oct - Fast regular triggers -> Trig - Out -> Stereo delay / reverb **Settings** - Decay: long - Damp: medium to high **Result** Overlapping notes create chord impressions from a single line. --- ## Patch 4: Expressive bassline **Connections** - Bass sequence -> V/Oct - Gate pattern -> Trig - Accent CV -> Decay CV **Settings** - Pitch low - Damp low-medium - Decay mostly short **Result** Punchy bass plucks with accented longer notes. --- ## Patch 5: Generative melodic texture **Connections** - Quantized random CV -> V/Oct - Random trigger source -> Trig - Slow random CV -> Damp - Slow random CV -> Decay CV - Out -> Reverb **Settings** - Decay medium-long - Damp around center **Result** An evolving, self-playing melodic texture with harmonic smear. --- # Performance tips ## Use decay to control harmonic density Because Pluck is polyphonic, **longer decay = more overlap = more harmony**. So if your melodic line feels too crowded: - shorten Decay If it feels too dry or empty: - lengthen Decay ## Use damp to place the sound in the mix - **Higher damp setting**: brighter, more present, more harmonics - **Lower damp setting**: darker, more muted, more supportive This makes Damp a great “arrangement” control. ## Be aware that old notes are replaced With only **4 voices**, dense trigger streams can start cutting off earlier notes. This can be used creatively: - for rolling arps - for controlled harmonic churn - for pseudo-strumming But if you want clearer sustained harmony, reduce trigger density or shorten the phrase. ## Exploit the newest-note pitch behavior Since the newest note can still respond to the pitch control, you can manually add: - microtonal bends - vibrato - phrase-end bends That makes the module more performable than many tiny digital pluck voices. --- # Limitations to keep in mind From the manual: - There is only **one audio output**, so polyphony is internally mixed - **Damp** and **Decay** affect only newly triggered notes - Polyphony is limited to **four voices** - Voice allocation replaces the **oldest** note first These are not drawbacks so much as characteristics to compose around. --- # Summary Pluck is best thought of as a **compact melodic string voice** for Eurorack. It is especially strong for: - sequenced plucks - basslines - arpeggios - generative melodies - overlapping harmonic figures - compact polyphonic textures from a single module Its most musically useful features are: - **1V/Oct pitch control** - **triggered note generation** - **4-voice polyphony** - **per-note timbral articulation via Damp** - **per-note sustain articulation via Decay** If you pair it with even a basic sequencer and trigger source, it becomes a very flexible melodic tool. Add modulation to Damp and Decay, and it starts to sound expressive and alive rather than static. [Generated With Eurorack Processor](https://github.com/nstarke/eurorack-processor)