This Instructables will teach you how to make a programmable pitch sequencer for any cassette tape machine, using Pulse Width Modulation (PWM) from a Raspberry Pi Pico. By the end of the project you will be able to add pitch and volume automation to your tape loops, using a custom OLED interface and a single rotary controller.
If you have been wanting to add a pitch mod to your tape machine but haven’t been sure how, or if you’re looking to upgrade your existing pitch mod, this tutorial will guide you through the process from start to finish, including some background theory, and links to scripts and resources.
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Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!