A Mac OSX GUI frontend for open source audio codecs. There is an older Windows version available as well.

A Mac OSX GUI frontend for open source audio codecs. There is an older Windows version available as well.

Dynamic Audio Normalizer is a library for advanced audio normalization purposes. It applies a certain amount of gain to the input audio in order to bring its peak magnitude to a target level (e.g. 0 dBFS). However, in contrast to more “simple” normalization algorithms, the Dynamic Audio Normalizer dynamically re-adjusts the gain factor to the input audio. This allows for applying extra gain to the “quiet” sections of the audio while avoiding distortions or clipping the “loud” sections. In other words: The Dynamic Audio Normalizer will “even out” the volume of quiet and loud sections, in the sense that the volume of each section is brought to the same target level. Note, however, that the Dynamic Audio Normalizer achieves this goal without applying “dynamic range compression”. It will retain 100% of the dynamic range within each “local” region of the audio file.
The Dynamic Audio Normalizer is available as a small standalone command-line utility and also as an effect in the SoX audio processor as well as in the FFmpeg audio/video converter. Furthermore, it can be integrated into your favourite DAW (digital audio workstation), as a VST plug-in, or into your favourite media player, as a Winamp plug-in. Last but not least, the “core” library can be integrated into custom applications easily, thanks to a straightforward API (application programming interface). The “native” API is written in C++, but language bindings for C99 Microsoft.NET, Java, Python and Pascal are provided.
muldersoft.com/#dyauno
github.com/lordmulder/DynamicAudioNormalizer
This is a component for the foobar2000 audio player. It allows using JavaScript to create full-fledged CUI/DUI panels!
Base functionality includes:
- Graphics functions: drawing (text, images, lines, rectangles and etc), image modification (resize, blur, inversion of colours and etc).
- Access to font and colour settings from CUI/DUI preferences.
- Capture of foobar2000 events with callbacks.
- Capture of keystrokes and mouse movement/clicks.
- Execution of main menu and context menu commands.
- Creation of custom buttons and menus.
- Playlist management: create, destroy, sort, change, rename and do anything that fb2k can do.
- Media Library access with ability to sort and filter it’s content.
- File tag management.
- Per panel settings storage.
- Built-in web and filesystem functionality.
- foo_acfu integration.
- And more!
github.com/TheQwertiest/foo_spider_monkey_panel
github.com/TheQwertiest/foo_spider_monkey_panel/wiki
github.com/TheQwertiest/foo_spider_monkey_panel/wiki/Installation
github.com/TheQwertiest/foo_spider_monkey_panel/releases/latest
HA Topic ~ hydrogenaud.io/index.php?topic=116669.0
GNU Solfege is *free* ear training software written in Python 3.4 using the Gtk+ 3 toolkit. The program is designed to be easily extended with lesson files (data files), so the user can create new exercises.




www.gnu.org/software/solfege
sourceforge.net/projects/solfege
A multi-platform software synthesiser emulating (somewhat inaccurately) pre-GM MIDI devices such as the Roland MT-32, CM-32L, CM-64 and LAPC-I.

GrandOrgue is a sample based pipe organ simulator. When connected to MIDI keyboards and an audio system, it can accurately simulate the sound of a real pipe organ. This application has builds for Linux, Windows and OSX.
Features:
- Play sample sets
- GUI console

sourceforge.net/projects/ourorgan/
sourceforge.net/p/ourorgan/wiki/Home
FAAC is an Advanced Audio Coder (MPEG2-AAC, MPEG4-AAC). The goal of FAAC is to explore the possibilities of AAC and exceed the quality of the currently best MP3 encoders.
Features:
- High quality audio
- High-speed encoding
- Portable
- LC, Main, LTP support
- DRM support through DreaM

faac.sourceforge.net
sourceforge.net/projects/faac
en.wikipedia.org/wiki/FAAC
CD Art Display / Rainmeter interface plugin. Displays Foobar2000’s now playing artwork and info on the desktop.
poiru.github.io/foo-cad
github.com/poiru/foo-cad
github.com/RangerCD/foo-cad-plus
ABC, developed by Chris Walshaw, is a format designed to notate music using plain text. It was originally designed for folk tunes of Western European origin which can be written on one staff, but has since been extended to support the notation of complete, classical music scores.
Since its introduction at the end of 1991, ABC has become very popular. Programs on many operating systems use ABC as an input and/or output format. There are programs which produce printed sheet music or allow for computer performances, search in tune databases, or that analyze tunes in some way.
The aim of this project is to promote the ABC language by maintaining the ABC standard and a set of software and source code that manipulate and present music written in ABC.
abcnotation.com
abc.sourceforge.net
The abc tune search / tune finder gives you access to thousands of folk & traditional tunes from across the web.
abcplus.sourceforge.net
sourceforge.net/projects/abcplus
ABC to HTML ~ sourceforge.net/projects/netabc
User Interfaces ~ sourceforge.net/projects/runabc
Reference: en.wikipedia.org/wiki/ABC_notation
EasyTAG is a simple application for viewing and editing tags in audio files.It supports MP3, MP2, MP4/AAC, FLAC, Ogg Opus, Ogg Speex, Ogg Vorbis, MusePack, Monkey’s Audio, and WavPack files, and it works under Linux or Windows.
Features:
- View, edit, write tags of MP3, MP2 files (ID3 tag with pictures), FLAC files (FLAC Vorbis tag), Ogg Opus files (Ogg Vorbis tag), Ogg Speex (Ogg Vorbis tag), Ogg Vorbis files (Ogg Vorbis tag), MP4/AAC (MP4/AAC tag), MusePack, Monkey’s Audio files and WavPack files (APE tag)
- Can edit more tag fields: title, artist, album, disc number, year, track number, comment, composer, original artist/performer, copyright, URL, encoder name and attached picture
- Auto tagging: filename and directory to automatically complete the fields (masks)
- Ability to rename files and directories from the tag (using masks) or by loading a text file
- Process selected files of the selected directory
- Ability to browse subdirectories
- Recursion for tagging, removing, renaming, saving…
- Can set a field (artist, title,…) to all other files
- Read and display file header information (bitrate, time,…)
- Auto completion of the date if a partial one is entered
- Undo and redo last changes
- Ability to process fields of tag and file name (convert letters into uppercase, lowercase,…
- Ability to open a directory or a file with an external program
- CDDB support using Freedb.org and Gnudb.org servers (manual and automatic search)
- A tree based browser or a view by artist & album
- A list to select files
- A playlist generator window
- A file searching window
- Straightforward and explicit interface
- Translations into many languages
- Written in C and using GTK+ for the GUI
- Packages available for Linux and Windows

AIMP is a powerful free audio player for Windows OS that supports for local files, NAS, clouds and podcasts. Additionally, it includes powerful tools to operate with audio files.
Multi-format Playback:
.CDA, .AAC, .AC3, .APE, .DTS, .FLAC, .IT, .MIDI, .MO3, .MOD, .M4A, .M4B,
.MP1, .MP2, .MP3, .MPC, .MTM, .OFR, .OGG, .OPUS, .RMI, .S3M, .SPX, .TAK,
.TTA, .UMX, .WAV, .WMA, .WV, .XM, .DSF, .DFF, MKA, AA3, AT3, OMA, .WebM,
.MPEG-DASH (YouTube)

www.aimp.ru
aimp2.us
Icons:
aablab.deviantart.com/art/Aimp-3-anthracite-icons-260461145
www.deviantart.com/aablab/art/AIMP3-BW-Icons-190763277
Skins:
aablab.deviantart.com/art/AIMP-3-Skin-Editor-258029733
www.deviantart.com/ddkonstantinov/art/A-Graph-ver-1-0-294252760
www.deviantart.com/merydev/art/MetalikGlass-Light-for-AIMP3-258995954
www.deviantart.com/yamshikoff/art/Metro-for-AIMP3-v3-Final-279912238
www.deviantart.com/raidero1/art/ZiX-for-AIMP3-273232347
www.myaimp.com/skins
angelag.ucoz.ru
VU Meter Skins:
www.aimp.ru/forum/index.php?topic=52865.0