All symbols starting with `d' in src/sd-uss

• DEFAULT_SOUND_BITS src/sd-uss/sound.h:34
• DEFAULT_SOUND_FREQ src/sd-uss/sound.h:35
• DEFAULT_SOUND_MAXB src/sd-uss/sound.h:32
• DEFAULT_SOUND_MINB src/sd-uss/sound.h:33
• dont_block src/sd-uss/sound.c:36