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Digital & Daisy

Digital signal processing and Daisy-based pedal building, for guitarists who also write code.

1
The Electrosmith Daisy Guide
The Electrosmith Daisy Seed is a self-contained embedded audio computer — an ARM Cortex-M7 chip, stereo audio in/out, and exposed control pins on a module the size of a guitar pick. This chapter covers what it actually is, how it differs from an analog pedal circuit, and the libDaisy/DaisySP software framework that turns it into an effect.
2
The Hothouse Build
The Hothouse, from Cleveland Music Co., is an open-source DIY pedal platform built around the Electrosmith Daisy Seed — a fully realized stompbox enclosure, footswitch, knobs, and jacks, so a builder solders one board and writes code instead of designing analog circuitry from scratch. This chapter covers what the Hothouse platform provides, how its controls map to code, and the assembly and toolchain steps specific to it.
3
DSP Basics for Guitarists
Digital signal processing turns a guitar signal into a stream of numbers at a fixed sample rate, then rebuilds voltage from whatever those numbers become after your code runs. This chapter covers sampling rate, bit depth, buffer size, and the digital equivalents of the analog concepts already covered in Fundamentals — the vocabulary every later Digital chapter assumes.
4
Coding Effects with C++
A Daisy effect's code lives inside an audio callback — a function that must return a finished block of processed samples before the next block is due, on a strict real-time schedule. This chapter covers that callback pattern, the handful of real-time rules it imposes on ordinary C++, and how AI-assisted coding is already showing up in the Daisy/Hothouse building community.

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