Daphile ~ Client Server Audio System


The Daphile is the heart of a digital music system. Its primary focus is in storage and playback of your digital music library. It enables the best possible audio quality and future-proof flexibility by providing plug&play support for USB connected digital-to-analog converters (DAC). You can easily setup a multi-zone system just by connecting another USB DAC for each zone.

Features:

  • Headless music server OS
  • Bitperfect and gapless playback
  • Extensive audio format support
  • Native DSD playback up to DSD512
  • PCM resolutions up to 384kHz/24bit
  • High quality audio resampling including PCM to DSD conversion
  • Convolution filtering for DRC and equalizer
  • “Play from RAM” to minimize CPU load and disk activity during playback
  • Automatic audio device configuration with multiplayer support
  • CD ripping with AccurateRip™ verification, automatic metadata tagging and cover art
  • Supports external file servers as music source
  • Easy configuration and installation through the web interface
  • WiFi hotspot support (if compatible hardware exists)
  • Software update via web interface
  • Network-attached storage (NAS) service
  • Whole system included in about 200MB ISO-file

Daphile is based on the open source Squeezebox Server, Squeezelite and Linux.
Since Daphile is used and configured completely via the web interface the user is not required to have any Linux skills.

www.daphile.com

exhale ~ MPEG-4 Audio Encoder


exhale, which is an acronym for “Ecodis eXtended High-efficiency And Low-complexity Encoder”, is a lightweight library and application to encode uncompressed WAVE-format audio files into MPEG-4 format files complying with the ISO/IEC 23003-3 (MPEG-D) Unified Speech and Audio Coding (USAC, also known as Extended High-Efficiency AAC) standard. In addition, exhale writes program peak-level and loudness data into the generated MPEG-4 files according to the ISO/IEC 23003-4, Dynamic Range Control (DRC) specification for use by decoders providing DRC. exhale currently makes use of all frequency-domain (FD) coding tools in the scale factor based MDCT processing path, except for predictive joint stereo, which is still being integrated. Its objective is high quality mono, stereo, and multichannel coding at medium and high bit rates, so the lower-rate USAC coding tools (ACELP, TCX, Enhanced SBR and MPEG Surround with Unified Stereo coding) won’t be integrated.

gitlab.com/ecodis/exhale
hydrogenaud.io/index.php?topic=118888

HOLMImpulse ~ Frequency & Impulse-response Measurement


  • Measure Impulse-response
  • Measure Phase-response
  • Measure Frequency-response
  • Measure Harmonic Distortion (THD)
  • Make bandwidth limited measurements with no phase-errors
  • Compare measurements
  • Import Frequency-response & Impulse-response
  • Export Frequency-responses & Impulse-responses
  • Use open formats for saved files (zip, wav/flac, txt)

holmimpulse

www.holmacoustics.com/holmimpulse.php

Volumio ~ Headless Audiophile Player


Volumio is an headless audiophile music player, designed to play music with the highest possible fidelity. Volumio runs on most embedded devices (Raspberry Pi, UDOO, Odroid, Cubieboard, Beaglebone, Pine64, Allo Sparky…) and on any ordinary PC (x86).

Volumio is a free and open source Linux distribution, designed and fine-tuned exclusively for music playback. It runs on a variety of devices, typically small and inexpensive computers like the Raspberry PI, but also on low power PCs, notebooks or thin clients.

By flashing (installing) Volumio on any of these platforms, it will then become an headless audiophile music player. Headless means that the only way to control it will be with another mobile phone, computer or tablet.

This is made possible by Volumio’s User Interface: a web applications that runs on any device with a browser, and that allows for an easy and intuitive control of your playback sessions. All communications between the web app and Volumio will happen through your home network.

volumio.org
github.com/volumio

DRC Designer ~ Optimize Audio Rooms


Digital Room Correction Designer was created to ease the process of creating and loading room correction filters for use with two channel stereo systems. DRC Designer includes Denis Sbragion’s DRC for creating room correction filters, John Pavel’s Convolver VST for playing music through the filters, and Simple Automated IR Measuring Tool by Denis Sbragion and Edward Wildgoose for creating the impulse response files needed by DRC.

TargetDesigner

www.alanjordan.org/DRCDesigner
Foobar2000 Setup

Equalizer APO ~ A Windows System Equalizer


Equalizer APO is a parametric / graphic equalizer for Windows. It is implemented as an Audio Processing Object (APO) for the system effect infrastructure introduced with Windows Vista.
Features:

  • virtually unlimited number of filters
  • works on any number of channels
  • very low latency, which makes it suited for interactive applications
  • low CPU usage
  • modular graphical user interface
  • VST plugin support
  • integrates into Voicemeeter (www.voicemeeter.com)

Equalizer APO is best used in conjunction with Room EQ Wizard (www.roomeqwizard.com ), because it can read its filter text file format.

equalizer apo
sourceforge.net/projects/equalizerapo
Discussion
Documentation
Downloads

User Interfaces:

Peace Equalizer
EQ APO GUI
mega-switcher

Resources:

Room Equalization Tutorial

DRC – Digital Room Correction Filter Generator


DRC is a program used to generate correction filters for acoustic compensation of HiFi and audio systems in general, including listening room compensation. DRC generates just the FIR correction filters, which can be used with a real time or offline convolver to provide real time or offline correction. DRC doesn’t provide convolution features, and provides only some simplified, although really accurate, measuring tools.

Website
Download
Documentation
Wikipedia

Freeware
Open Source
Unix