AP-1

Analog Karplus Strong voice module

This module is now discontinued. A new updated version in 8HP has been released: Morphor Plectrum

The Morphor AP-1 module is a fully analogue Eurorack module that can produce plucked string sounds. Based on the Karplus-Strong principle, this module is a compact all-in-one solution for generating amazing bass, acoustic guitar and percussion sounds.

CONTROLS:

GATE: to pluck the string, simply insert a 5V pulse into the input. Short triggers work great but you can play around with longer pulses to get rougher sounds.
TUNE: change the frequency of the string with a 1V/oct input. Afterwards you can generate vibrato and other effects with a separate CV pitch input (in development).
COLOUR: you can alter the timbre of the string with this control, including a CV input. This way you can get very noisy or dampened sounds.
FILTER BYPASS: the colour parameter is shaped by an internal filter but can be bypassed if you like. Use your own external filter to generate unique sounds. A one pole low pass filter will give the best results but feel free to get creative with this feature. You can insert anything you like into the loop.
FEEDBACK: by adjusting the feedback amount it's possible to change the decay of the sound. Create short plucked sounds or long ringing strings. In some configurations, you might even get some nice oscillations.
OUTPUT: take the output to the rest of your modular system and start experimenting!

Other information:

Frequency range: sub audio range to roughly 800 Hz
Dimensions: 10HP width, 3U Eurorack standard
16-pin power socket

This module is now discontinued. A new updated version in 8HP has been released: Morphor Plectrum

Morphor

https://morphor.io/products/modules/ap-1/