PiPedal turns a Raspberry Pi into a full guitar effects and amp emulation platform, controlled via mobile device or web browser. The audio engine runs on any single-board Linux computer and is designed to work at home, on stage, or in a studio without reconfiguration. Code and documentation live on GitHub at rerdavies/pipedal.
This is not a simple filter chain. One user, after running PiPedal through a range of amp models and effects he could not afford to own physically, concluded he should sell all his pedals and build a dedicated stomp box around it. That blog post, linked from the Hackaday writeup, is worth reading on its own for the specific comparisons and workflow details.
The original article is short, but the two external links carry the real weight: the PiPedal project page at rerdavies.github.io/pipedal and the user's blog post at blog.ktz.me. Read both before deciding whether your next gear purchase is hardware or a Pi and an audio interface.
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