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Raspberry Pi 'Slimshader' Adds Real-Time Visual Effects to Your Music

Submitted by Roy Schestowitz on Thursday 23rd of June 2022 12:00:12 PM Filed under
Hardware

Custom synth projects are nothing new in the Raspberry Pi community but this open-source shader PCB known as Slimshader is definitely a breath of fresh air in the DIY synth world! Created by maker and developer Erik Oostveen, this project aims to provide custom visual effects to music in real-time.

According to Oostveen, Slimshader is a GlslViewer-based, open-source PCB designed to display shader files with a Eurorack design. It offers both analog and HDMI output for video, allowing users to add visual effects to music in real-time. If you’re new to shaders, these are graphic simulations that respond to audio input.

The Slimshader PCB was designed from scratch by Oostveen and features a graphics design printed across the top. It has a series of inputs available that can be used to program custom visual effects. On the reverse is a Raspberry Pi which powers the project. Slimshader has been tested and confirmed to operate with a Raspberry Pi Zero W, Raspberry Pi Zero 2 W, and a Raspberry Pi 3B.

A custom image file was created just for the Slimshader which, can be downloaded from a Google Drive link available on Oostveen’s website. Shaders can be displayed and modulated using audio input, potentiometers, low-frequency oscillators, voltage control and even via MIDI. Oostveen recommends glslsandbox for finding shaders to experiment with created by various artists who share their work online.

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