Name: MF#K: Interactive rhythm-machines with Fry and FRP
Start: 2023-10-24T18:00:00+02:00
End: 2023-10-24T21:00:00+02:00
Location: Prosa (ADA lokale)

**... or: How to construct instruments of your instruments**

*Talk by Claes Worm*

[Fry](https://github.com/rand00/fry/tree/main) is a new library of functional reactive (FRP) combinators for constructing interactive/generative rhythm-machines in OCaml. It has proven itself to be useful for several different domains - e.g. as a basis for the upcoming polyrhythmic modular-synth module **pmmd**, and for animations in UI programming.

It was initiated as an experimental repository to be used by the interns of [Outreachy](https://www.outreachy.org/). Its based on my experience with FRP for generative client applications controlling the granular visual synthesizer [niseq](https://r7p5.earth/blog/2020-9-7/The%20ideas%20behind%20Niseq). Another factor was that I've been inspired by Erica Synths rhytmic-machine, [Perkons HD-01](https://www.ericasynths.lv/shop/standalone-instruments-1/perkons-hd-01/) \- but with a price of 18k dkk\, and FRP being extremely expressive for programming with time\, it felt obvious to create a set of FRP combinators to concisely express your own rhythm\-machines\.

Though - a rhythm-machine is just a domain-specific instance of an event-generating system; where Fry, as a set of library combinators, is useful for controlling anything you like. An example could be to orchestrate a heterogenous set systems for generative art installations: lights, sensors, synthesizers, actuators etc.

\-\-\-
We have set up a collaboration with Prosa, who generously offered to provide a location for our regular meetups. Please see [Prosa's Calendar](https://www.prosa.dk/kalender/hele-kalenderen/) for more details.

Joakim Ahnfelt-Rønne

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MF#K: Interactive rhythm-machines with Fry and FRP

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