Lulu04 / ALSound

Audio library designed to provide an easy way to play, capture and mix audio.

Introduction

ALSound offer an easy way to play, capture and mix sounds in your FreePascal/Lazarus applications. It use OpenAL-Soft and LibSndFile libraries. You hardly have to know these libraries to use ALSound.
Tested under Linux, Windows and MacOS (x86-64 only).

Contents

'source' -> the source of ALSound.

'example' -> contains some examples to show how to integrate ALSound in your FreePascal/Lazarus programs. After compilation, the example executable are placed in folder "binary", sub-folder "$(TargetCPU)-$(TargetOS)"

'docs' -> In progress. Contains a copy of OpenAL documentation.

'binary' -> contains sub-folder for each actual supported platforms. The compiled binaries of OpenAL-Soft and LibSndFile are provided for Windows and Linux both i386 and x86-64 and can be found in their respective sub-folder. If you prefers to compile these libraries by yourself, please go to their respective github repository and follow the guideline.

placing libraries in your Lazarus project

ALSound loads dynamically the two libraries at startup:

Under Windows

The dlls must be named 'soft_oal.dll' and 'sndfile.dll' and copied in the same folder (or in a sub-folder) as your executable.

Under Linux

The libraries must be named 'libopenal.so' and 'libsndfile.so' and copied in the same folder (or in a sub-folder) as your executable.

Under MacOS

The libraries must be named 'libopenal.dylib' and 'libsndfile.dylib'.

• If your application don't use a bundle, put a copy of the libraries in the same folder (or in a sub-folder) as your executable and in your Lazarus->Project options->Application->uncheck 'use Application Bundle for running and debugging'.
• If your application use a bundle, put a copy of the libraries in the Resources folder of the bundle (or sub-folder and in your Lazarus->Project options->Application->check 'use Application Bundle for running and debugging'.

NOTE for all platforms: if you use a sub-folder your application must call ALSManager.SetLibrariesSubFolder(OnlyTheNameOfTheSubfolder) before calling ALSManager.LoadLibraries.

Thanks

Thanks to Christopher Robinson, the author and maintainer of OpenAL-Soft, for its help. (https://github.com/kcat/openal-soft)
Thanks to the LibSndFile team. (https://github.com/libsndfile/libsndfile)

Thanks to Fred van Stappen, the author of United OpenLib of Sound (UOS) (https://github.com/fredvs/uos) who wrote pascal binding for LibSndFile and PortAudio. This inspired me to write pascal binding for OpenAL-Soft and LibSndFile used by ALSound.