[LAA] Drumstick Libraries 2.7.1 Released

[Pedro Lopez-Cabanillas]

Drumstick is a set of MIDI libraries using C++/Qt idioms and style. 
Includes a C++ wrapper around the ALSA library sequencer interface: ALSA 
sequencer provides software support for MIDI technology on Linux. A 
complementary library provides classes for processing SMF (Standard MIDI 
files: .MID/.KAR), RIFF MIDI (.RMI), and Cakewalk (.WRK) file formats. A 
multiplatform realtime MIDI I/O library and a GUI Widgets libraries are 
also provided for Linux, Windows, and Mac OSX.

This is another sonivox related release. Please see: 
	https://github.com/pedrolcl/sonivox

I didn't want to make the sonivox dependency mandatory, because there may 
be good reasons for an user to avoid building drumstick with all its 
features. A final user may be interested in FluidSynth output only (which 
is also an optional feature) or even using ALSA sequencer only, without any 
soft-synth at all.

But what is a legitimate choice for a final user may be a questionable 
restriction for a distribution, because you may not know all use cases of 
your users. In this case, SonivoxEAS is the default Linux output for 
drumstick-vpiano and VMPK, because I think that any user installing those 
programs the first time should be able to hear sound by default, without 
needing to configure/investigate about MIDI or SoundFonts. Otherwise, there 
will be many users complaining that their Linux virtual pianos do not 
produce any sound!

On the other hand, until now the sonivox library sources were embedded 
inside the drumstick source tarballs, and statically linked to the 
SonivoxEAS backend. This was against most Linux distros packaging policy. 
Providing an standalone shared library instead, the issue has been fixed.

Changes in v2.7.1:

* Fixed ticket #45: the sonivox library dependency (for the SonivoxEAS 
synth backend) is optional, and easily forgotten by 3rd party packagers.
  The build system configuration now fails with an error message if the 
sonivox library is missing unless the cmake variables USE_SONIVOX and 
USE_PULSEAUDIO are set to OFF.
  Same failure with the FluidSynth backend and the variable USE_FLUIDSYNTH, 
and the ipMIDI Network backend and USE_NETWORK.
* Fixed underlinking in some RT backends.

Compilation minimum requirements for all platforms: 

* C++11 compiler
* CMake 3.14
* Qt5 >= 5.9 or Qt6 >= 6.2 (with Qt6Core5Compat library dependency for 
Drumstick::File)

Feature dependencies (for some platforms):

* ALSA (Linux only)
* PulseAudio (Unix)
* D-Bus (Unix)
* Sonivox (Unix)
* FluidSynth (All platforms)

Copyright (C) 2009-2022, Pedro Lopez-Cabanillas
License: GPL v3 or later

Project web site
https://sourceforge.net/p/drumstick

Online documentation
https://drumstick.sourceforge.io/docs/

Downloads
https://sourceforge.net/projects/drumstick/files/2.7.1/