Eurorack Module

PEAK+HOLD

Dynamic Percussion Interface

The Peak & Hold allows one to play and control analog synthesizer equipment using a drum with a pickup or any other percussive signal source. It generates 9 different CV/signal outputs from one input source. The P+H provides a dynamic hold voltage (linear and logarithmic), a dynamic impulse signal e.g. for triggering filters or delays, a dynamic release signal (linear and logarithmic), an envelope and a gate signal output. Additionally, the original sound signal (amplified) is available for further signal processing.
The input stage is equipped with  adjustable level and trigger controls and a filter for flexible adaptation of different percussive instruments – such as long or short sounding, high or low drums and cymbals. Furthermore, there is a 2nd input to cascade two Peak+Holds or to add another signal source.

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Minijack version
  • Dynamic signal processing
  • 9 different CV/signal outputs
  • Manual level, trigger and filter controls of the input signal
  • Selectable frequency band (for cascading 2 or more P+Hs)
  • Pickup included
  • Optional with banana or 3,5mm minijack sockets
  • Width: 10 HP
  • Dimensions: 128,5 mm x 50,5 mm
  • Depth: 35mm
  • Supply voltage: ±12V
  • Consumption: max. 75mA
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Banana version

Soundfiles

XR22VCO, 2 X multipliers, Noise
(1:19)

Delay1022 with KorgMS20 filters & VCA
(1:09)

2 P+Hs in frequency-selective mode; 2 XR22VCOs, Delay1022, KorgMS20
(2:03)

Input: Cymbal; 2 XR22VCOs, Delay1022, KorgMS20
(2:00)

Input: Rhythm machine; XR22VCO, Delay1022
(2:03)

Or listen on
https://soundcloud.com/cg-products/sets/peakhold

Documentation

PDF Download

Docu Download

Panel

Side view right

Side view left

Side view left 90°
P+H Pickup

Pickup

 

Video-coming-soon

Principle of Operation

Similar to a ‚Sample & Hold‘, the Peak+Hold detects an input signal’s amplitude  when triggered and keeps it as hold voltage until the next trigger appears. But in contrast to the  S&H, which keeps the signal amplitude’s momentary level, the P+H holds  its highest amplitude level (peak). The following incoming signal resets the Peak+Hold by triggering at the very beginning and the next hold value will be set.
The trigger threshold is adjustable by knob ‚Trigger‘. In addition,there is a ‚Filter‘ knob allowing to adapt the P+H to various input signal sources, such as drums or cymbals. This special lowpass filter is only affecting the falling edges of the internal envelope signal, ensuring minimal latency and best response to all percussive input sounds.
‚Impulse Out‘ and ‚Release Out‘ have a slightly different operation principle: After triggering by an input signal, a minimal latency time is internally set. At the end of this time, the momentary volume amplitude value is detected and generates now the hold voltage on the outputs ‚Impulse Out‘ and ‚Release Out‘. Duration of  the impulse signal can be regulated by knob ‚Impulse‘, length of the release time by knob ‚Release‘.

Output Waveforms

Pickup settings

There is a piezo pickup and double-sided adhesive tape included to the Peak+Hold module package by standard, so it is easy to connect the P+H to any percussive instrument. The pickup is equipped with 1/4′ jack and 2m cable.

Pickup on tabletop Pickup on wooden board Pickup on wooden board II Pickup on bongo drum Pickup on cymbal
Tabletop Wooden board Bongo drum Cymbal

Examples

Simple patches with other (CG Products‘) modules

Patch Description Audio
Patch_PH-XR22VCO

1. Peak+Hold controlling the XR22 VCO FT
The Peak+Hold’s linear release output is connected to the XR22VCO FT’s AM input and controls the VCO’s sinewave/triangle output amplitude.

Different XR22VCO frequency settings
Peak+Hold CV outs are controlling the VCO’s frequencies (in FSK mode)

Patch_PH-Delay

2. Peak+Hold triggering the Delay1022
The dynamic pulse output of the Peak+Hold triggering the Delay1022 is a simple way to create percussive drum- and string-like sounds.
Instead of a delay, also VCFs with high resonance can be triggered.

Different Delay1022 Lowpass filter settings
Peak+Hold CV output is controlling the delay time

Patch_PH-2xX

3. Peak+Hold and X multipliers
The Peak+Hold ’s logarithmic release output is connected to the control inputs of 2 X multipliers. The multipliers are working as exponential VCAs with different operation points (see different positions of knobs ‚Offset‘ and ‚Level‘). The 2nd X multiplier only gets active from a certain CV amplitude level.

1st X audio signal in: VCO
2nd X audio signal in: Noise/VCO;
Peak+Hold Input: Pickup on drum
…Rhythm machine

Patch_PH-Pre

4. Peak+Hold with Pre
When running the Peak+Hold with the Pre (The preamplifier’s output is applied on ‚In 2‘ ), the Pre’s knob ‚Sensitivity‘ is overtaking the function of the Peak+Hold knob ‚Input1 Level‘ (which is only referring to input socket ‚Drum In‘).

Pre Microphone input: Different percussion instruments.
Peak+Hold CV outs are controlling cutoff frequencies of Korg MS20 VCFs and VCA envelope