# WeebLabs/DSPi

A fully featured audio DSP firmware for the Raspberry Pi Pico (RP2040) and Pico 2 (RP2350).  Official Discord: https://discord.gg/RCyqxAQ5xS

Repository: https://github.com/WeebLabs/DSPi
Canonical: https://ross.abutalabs.com/products/dspi
Language: C
License: GPL-3.0
License Family: copyleft
Last push: 2026-08-24T08:15:18+00:00

## Health v2 (maintenance only)
Score: 82/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 99, longevity 16
- inputs: {"age_days": 237, "days_push": 9, "days_rel": 9, "gap_med": 5.0, "n_releases_24m": 37}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1185, forks 72 (observed 2026-08-28T04:03:54.770708+00:00)

## What it is
DSPi is a fully featured audio DSP firmware that turns a Raspberry Pi Pico (RP2040) or Pico 2 (RP2350) into an inexpensive USB sound card with an onboard digital signal processing engine. It provides room correction, active crossovers, parametric EQ, time alignment, loudness compensation, and headphone crossfeed with S/PDIF and I2S outputs.

## Use cases
- turn a Raspberry Pi Pico into a USB sound card with DSP
- build an active multi-way speaker crossover on a budget
- apply parametric EQ and room correction to USB audio
- add headphone crossfeed and loudness compensation to a listening setup
- route and mix USB audio channels to multiple I2S or S/PDIF DACs
- use a Pico as a cheap digital audio processor for hi-fi

## When to choose
- you want a very low-cost, hackable audio DSP on RP2040/RP2350 hardware
- you need USB audio input with flexible matrix mixing and PEQ filtering
- you want plug-and-play USB audio on macOS, Windows, Linux, or iOS with onboard processing

## When to avoid
- you need very high sample rates beyond 96 kHz or multichannel beyond 8 outputs
- you need a general-purpose desktop DSP running on a PC rather than embedded firmware
- you require proprietary codecs like Dolby or DTS decoding

## Facets
- artifact type: application
- maturity: active
- function: audio-processing, embedded, sdk
- domain: embedded-systems, hardware
- platform: embedded, cross-platform
- tags: raspberry-pi-pico, rp2040, rp2350, dsp, firmware, usb-audio, equalizer, crossover, i2s, spdif, audio

## Member repositories
- WeebLabs/DSPi (main) score 82

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:54.770708+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:24:06.467175+00:00, confidence not recorded.
  - readme: https://github.com/WeebLabs/DSPi (fetched 2026-08-28T04:03:54.770708+00:00, sha bac90f4628a7)
- Data as of 2026-08-30T08:39:29.467469+00:00.