Category Archives: Hardware

Physical Devices

SOF ~ DSP Firmware Infrastructure & SDK

Posted by tom2tec on

Sound Open Firmware (SOF) is an open source audio Digital Signal Processing (DSP) firmware infrastructure and SDK. SOF provides infrastructure, real-time control pieces, and audio drivers as a community project. The project is governed by the Sound Open Firmware Technical Steering Committee (TSC) that includes prominent and active developers from the community. SOF is developed in public and hosted on the GitHub platform.

The firmware and SDK are intended for developers who are interested in audio or signal processing on modern DSPs. SOF provides a framework where audio developers can create, test, and tune the following:

  • Audio processing pipelines and topologies.
  • Audio processing components.
  • DSP infrastructure and drivers.
  • Host OS infrastructure and drivers.

sofproject.org
thesofproject.github.io
github.com/thesofproject/sof
Youtube: Sound Open Firmware – Liam Girdwood, Intel

SJPlot Online ~ Phono Cartridge Frequency Response Analysis

Posted by tom2tec on

You can now use this WEB UI to generate frequency response graphs

sjplot.com/online
www.audiosciencereview.com/…introducing-the-phono-cartridge-measurement-library

THD Meter ~ Measure Total Harmonic Distortion

Posted by tom2tec on

MathAudio THD Meter VST/AU

  • Measures Total Harmonic Distortion (THD) in sound cards, speakers and headphones.
  • Applies matched filters for maximizing the signal-to-noise ratio (SNR) in the presence of additive stochastic noise.
  • Supports microphone calibration files.
  • Supports full range of sample rates from 44.056 kHz up to 384 kHz. All sample rates are supported without resampling to avoid any possible loss in accuracy.

mathaudio.com/thd-meter

Deej ~ Hardware Volume Mixer

Posted by tom2tec on

deej is an open-source hardware volume mixer for Windows and Linux PCs. It lets you use real-life sliders (like a DJ!) to seamlessly control the volumes of different apps (such as your music player, the game you’re playing and your voice chat session) without having to stop what you’re doing.

red deej hardware with five sliders

github.com/omriharel/deej

Roon Command Line Project ~ Roon Automation & Control

Posted by tom2tec on

The Roon Command Line project provides Bash and Python scripts to enable command line control of the Roon audio system over a local network.

Note: No modifications are made to the Roon Core. The RoonCommandLine package resides entirely on other systems within your local area network.

rooncommand.dev
github.com/doctorfree/RoonCommandLine

Q17 ~ QUAD 405 MOSFET Amplifier

Posted by tom2tec on

Q17 is an amplifier based on the QUAD 405 current dumping principle.

Please refer to Q17 Project description from Tiberiu Vicol’s original design.

Q17-Turbo project (200W @ 8 Ohms):

The natural evolution of the Q17-Mini, this time with two pairs of power transistors, better thermal management with the same technical characteristics and the same sound signature.

Q17 PCB

github.com/stefaweb/Q17-Amplifier

The Raspberry Jam ~ Raspberry Pi Guitar Effects Pedal

Posted by tom2tec on

The realtime Raspberry PI powered digital guitar effects pedal.

Key Features:

  • Realtime audio loop
  • Cutsomisable effects
  • User profiles
  • Low cost
  • Simple effect creation
  • Specialized audio electronics design
github.com/Jscott44/RTEP5-the-raspberry-jam

Phoniebox ~ RPi-Jukebox-RFID

Posted by tom2tec on

Phoniebox is a contactless jukebox for the Raspberry Pi, playing audio files, playlists, podcasts, web streams and Spotify triggered by RFID cards. All plug and play via USB, no soldering iron needed. It also features GPIO buttons control support.

github.com/MiczFlor/RPi-Jukebox-RFID

Smart Boomboxes ~ HiFi Sound, Craftsmanship, Voice & Privacy

Posted by tom2tec on

Listen to great sound from a quality crafted boombox using voice input which maintains your privacy.

smartboomboxes.com
www.youtube.com/watch?v=WRiqg0b-EPI

ML_SynthTools ~ Arduino Synthesizer Library

Posted by tom2tec on

This library is made to be used for synthesizer projects. It contains modules to create sound, to drive an audio codec and create some audio effects.

This library supports different platforms:

  • ESP32, ESP32S2, ESP32S3
  • ESP8266
  • Seeedstudio XIAO (samd21 – cortex-m0plus)
  • Teensy 4.1 (imxrt1062)
  • Daisy Seed (cortex-m7)
  • Raspberry Pi Pico (rp2040)
  • STM32F407 (cortex-m4)
github.com/marcel-licence/ML_SynthTools

MuPiBox ~ Raspberry Pi Music & AudioBook Box

Posted by tom2tec on

The MuPiBox is an easy-to-use music player. Local music files, Spotify and streams from the Internet can be played. Operation via touchscreen is child’s play for young and old…

Features:

  • Music box for young and old
  • Touch display
  • easy to use (no access to the shell necessary!)
  • Update function
  • Spotify – album, playlists (premium account is required)
  • Local music – MP3, Flac, WAV, WMA
  • Generate local playlists at the touch of a button
  • Streams / radio via internet
  • Simple administration via display
  • Advanced administration via web interface
  • Easy installation (without shell access)
  • Automatic power off
  • Display timeout
  • Resume function
  • Read aloud collection/artist and album (Google TTS)
  • own sorting by radio play, music, playlist and radio
  • automatic offline / online switching depending on availability
  • Simple user interface
  • Cover ad
  • Add additional WiFi hotspots on the go
  • Construction of an individual housing (3D printing)
  • Tested hardware list
  • Slim OS (dietPi)
  • Few file accesses – logs etc. in RAM to protect the SD card
  • Open Source
  • Best community ;)
  • Support from developer
  • Themes

mupibox.de
github.com/splitti/MuPiBox

Euphonium ~ Multiplatform Extensible Audio Streaming

Posted by tom2tec on

Euphonium is a highly extensible audio streaming software. It’s multiplatform, also supporting low cost MCU’s like espressif ESP32 series.

Features:

  • Clean and lightweight web-ui.
  • Supports multiple plugins: Spotify streaming, Bluetooth (on esp32), Web Radio, Jellyfin.
  • Fully modular architecture.
  • Easily extendible and portable to new hardware, thanks to the internal Berry-lang powered scripting engine.

Required hardware for esp32:

  • Any ESP32 chip with at least 4MB of flash and 4MB of PSRAM. Wrover chips are usually a good call. 🙂
muvox-io.github.io/euphonium
github.com/muvox-io/euphonium