Sound from scratch, calculated with the Perl programming language
This is a side project from a side project, but it turned out to be a lot of fun so that I'll probably continue to spend some of my spare time on it.
It started with my interest for the Corinna project to bring "modern" object orientation into the core of the Perl programming language.
Then I noticed (a few years ago) that my favourite editor Emacs does not understand newer Perl syntax, and as a side project I added missing stuff to CPerl mode. So, upcoming Emacs 30 will understand Perl syntax including Perl 5.40.
While working on this I noticed that - as could be expected - there is not much code out there in the wild which already uses the new Perl syntax. So, to get some test and practice, I had to write my own.
So this project was started to test CPerl mode and at the same time have fun. For the Perl code this means that it isn't very consistent in its style intentionally because I needed CPerl mode to cover different coding styles. The repository also contains some dead code and many undocumented features. Sorry for that.
Part of this work was the specification of a file format which I could use to thest the audio software: It should be easy to write for humans (unlike MIDI). This spec is now here, but unfortunately GitHub's POD rendering clobbers Unicode characters in Code sections. Also, HTML rendering of musical note symbols looks worse than I expected even when correctly decoded, so perhaps I'll drop that.
The eg directory has a few examples of music roll files which can be
played with the program bin/mrt_play. This needs the sox program
to be on your path.
Two of the samples created by mrt_play (~300kB, ~30 seconds each) are at https://haraldjoerg.github.io/i/entertainer.ogg and https://haraldjoerg.github.io/i/lvb_27_2.ogg .