Tag: DSP

ESP32-A1S Guitar Multi-Effect Engine with Microphone and MIDI I/O

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Since the release of ESP32 by Espressif, many application-specific modules based on this chip are produced. For example, Ai-Thinker produce image processing module with artificial intelligence support for image recognition. In the audio processing area, one interesting product by Ai-Thinker is the ESP32-A1S module. Because of the integrated AC101 codec inside, this module enable very compact and low cost solution […]

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Category: Electronic Circuit Design Tags: , ,

Linear Interpolation Extension Employing Three-Gradient

Speed and Memory Size Optimization When developing digital signal processor for Deepstomp, we employs a cheap 32-bit processor without floating point unit. Consequently, we have to optimize all computation in fix point math. The most important effect, especially for electric guitar, is distortion effect. It is simulated using sigmoid or sigmoid-like functions such arctan, tanh, or some others. Those functions […]

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Category: Software Design Tags: , , , ,

DIY Digital Effect Pedal Platform Review: The Top 9

9 DIY Digital Effect Pedal Platform List To start researching on DIY (do-it-yourself) digital  effect pedal for the next project, let’s see the list first. Take a look at some popular platforms to compare their specifications and prices, here are some: UNO – Electrosmash’s pedalSHIELD UNO MEGA – Electrosmash’s pedalSHIELD MEGA DUE – Electrosmash’s pedalSHIELD DUE Electrosmash’s Pedal Pi Openmusiclabs’s […]

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Category: Electronic Circuit Design Tags: , , , ,