excellent, highly recommended. much of the texts are previously untranslated so it’s not just a collection of stuff previously available in CMJ or whatever. Koenig is definitely among the more cogent and self-critical of his generation and provides a good amount of analysis of his and other’s work. as far as I know there are barely any recordings of his pieces using SSP, which is annoying. Closest thing might be this paper on PILE, another nonstandard ‘instruction-based’ synthesis language, by Paul Berg—one of Koenig’s students.
not really, unfortunately. Brün likes to keep it abstract, insofar as he’s mostly concerned with the communicative (or ‘anti-communicative’) and broadly methodological aspects of his work as they relate to aesthetics. there’s very little analytical work re: SAWDUST project—among my favorite computer music, fwiw—except for this paper by Di Scipio (who has apparently written on Brün at greater length elsewhere, though this remains currently untranslated), but this doesn’t go into much technical detail either. Schmickler et al. have a SuperCollider implementation of SAWDUST though it seems unfinished.