The card and chip sounds never convinced as oscillators, so they're now
CC0 recordings (Kenney's casino pack) under /static/audio/casino, embedded
in the binary. Six names (card, deal, flip, shuffle, chip, sweep) play
several rotating takes with a little pitch jitter; everything melodic stays
synthesised. PeteSFX's API is unchanged and synthesis is the fallback while
an ogg is still decoding, so no caller changed and the table is never silent.
30b0e8debb