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Audio Tools Library .NET is the C# port of the original ATL, written in Pascal by the MAC Team (Jürgen Faul, Gambit and contributors).

It is aimed at giving C# developers a native, portable and easy-to-use library to access and read data from various digital audio formats.

As a showcase, I have used ATL.NET as a cornerstone to build Ethos Cataloger, a digital music cataloging software written entirely in C#.

Audio Tools Library .NET is not

• a standalone application : it is a library aimed at being used by developers to build software

• an audio music player : it gives access to various properties and metadata (see below for the comprehensive list), but does not process audio data into an audible signal

ATL has been open source since its creation. The ATL 2.3 source written in Pascal language is still out there on Sourceforge !

By publicly sharing the result of their work, the MAC team has helped many developers to gain tremendous time in creating audio tools.

As a fellow audiophile and developer, I'm proudly extending and improving their initial contribution to the open source community.

• ATL is a fully native C# implementation, which makes portability trivial if your app is already based on .NET or Mono frameworks

• ATL features a flexible logging system which allows you to catch and record audio file reading/writing incidents into your app

• ATL supports more audio formats than TagLib, including video game audio formats (SPC, PSF, VGM, GYM)

• ATL supports chapters natively

• ATL supports BEXT, LIST INFO and iXML metadata in RIFF / WAV files

• ATL supports Playlists and Cuesheets

The ATL library runs on .NET Core 2.0+ / .NET Standard 2.0+ / .NET Framework 3.0+ / Mono 2.0+

ATL unit tests run on .NET Framework 4.5+

The library and its tests have been maintained on Visual Studio Express 2012, 2015 and 2017 Community

Please refer to the Code snippets section of the Documentation for quick usage

NB1 : Empty cells mean "not applicable for this audio format"

NB2 : All metadata is read according to Unicode/UTF-8 encoding when applicable, which means any "foreign" character (japanese, chinese, cyrillic...) will be recognized and displayed properly

R= Read / W= Write

(1) : ATL reads ID3v2.2, ID3v2.3 and ID3v2.4 tags, but only writes ID3v2.3 tags and ID3v2.4 tags

(2) : all sample names appear on the track's Comment field. Track title only is editable

(3) : MIDI meta events appear on the track's Comment field

(4) : Support for BEXT, LIST INFO and iXML chunks

• Audio properties (from audio data) : Bitrate, Sample rate, Duration, VBR, Codec family, Channels count and arrangement
• Standard Metadata (from tags) : Title, Artist, Album Artist, Composer, Conductor, Description, Comment, Genre, Track number, Total tracks, Disc number, Total discs, Year, Album, Rating, Publisher, Copyright, Original album, Original artist, Embedded pictures, Chapters
• Custom Metadata : any other field that might be in the tag is readable and editable by ATL

• Read-only : FPL
• Read and write : ASX, B4S, M3U, M3U8, PLS, SMIL (including WPL and ZPL), XSPF

CUE

• Support for Broadcast wave metadata : aXML and XMP
• Support for other audio file formats : Speex, Theora, Audible
• Support for lyrics fields
• Connectors to other library file formats (e.g. iTunes)

NB : Any user request that can be granted quickly will take priority over the roadmap

ATL.NET is based on :

• Audio Tools Library 2.3 by Jurgen Faul, Mattias Dahlberg, Gambit, MaDah and Erik Stenborg (code ported from Pascal to C# and refactored)

• MIDI class 1.5 by Valentin Schmidt & Michael Mlivoncic (code ported from PHP to C# and refactored)