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* config.in (HAVE_SOUNDCARD_H): Undef.
(HAVE_SOUND): Define if HAVE_SOUNDCARD_H.
* Makefile.in (LIBSOUND): New variable.
(LIBES): Include it.
* sound.c [HAVE_SOUNDCARD_H]: Include <sys/ioctl.h> and <soundcard.h>.
(DEFAULT_SOUND_DEVICE): Define to "/dev/dsp" if not defined elsewhere.
(vox_open): Use DEFAULT_SOUND_DEVICE.
* s/netbsd.h (DEFAULT_SOUND_DEVICE): Define to /dev/audio.