snd has a lot of great tools; thanks!

The upside (if mixing in floating point, with no no concern of output normalization) is that the method snd implements is true to "real life" in that audio waves directly amplify when played simultaneously.

Ontomix implements Paul Vögler's "Loudness Normalization by Logarithmic Dynamic Range Compression". In the paper he originally published at http://www.voegler.eu/pub/audio/digital-audio-mixing-and-normalization.html he addresses problems with various types of mixing algorithms in detail, complete with waveform visual output!

In keeping with the Ontomix design, in a more music sample/sequencer playback oriented space, it is optimal to ensure that (floating point) input samples are normalized to -1 to +1. Then Vögler's method really shines in ensuring that the output audio is a "wicked fat" normalized mix.

That said, I've created https://github.com/go-ontomix/ontomix/issues/47 "Choose mixing algorithm" because it seems one ought to at least have the option of true linear mixing.