Morphor AP-1 - Analogue String Synthesis Eurorack Module

video uploads by Morphor

via the Morphor AP-1 Kickstarter

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. By using high quality analogue components we made a module with a rich sound. Being only 10HP in width, you won't need a lot of space to get going and start creating some incredible music. Background

I am Thijs, based in Belgium, dipping my toes into developing modules for the first time. After recently graduating as an electronics engineer, I'm currently looking for ways to use my skills and passions to create new things that people love. Thanks to Eli and Matthew from ENT Studios, music lovers who have been just as passionate about this project, this dream is coming to reality. They have over 15 years of experience as electronics engineers and have been supporting me with technical advice, frontplate design and more.

The idea for the Morphor AP-1 module came from personal experience and interests. Being extremely passionate about music, playing bass myself and having some experience with string synthesis in software, the idea to bring this concept to Eurorack in a completely analogue way was obvious from the start. After months of tinkering away I am confident enough in my working prototype to share this exciting project with the world.

The Morphor AP-1 module can produce plucked string sounds with a wide variety of sounds. The module has the following 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.
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 400 Hz
Dimensions: 10HP width, 3U Eurorack standard
3.5mm patch cables for all jacks
16-pin power socket