EAP(4) | Device Drivers Manual | EAP(4) |
eap
—
eap* at pci? dev ? function ?
options EAP_USE_BOTH_DACS
audio* at audiobus?
joy* at eap?
midi* at eap?
eap
driver provides support for the Ensoniq AudioPCI
and Creative Labs SoundBlaster PCI series of audio cards. All models based on
the ES1370, ES1371, and ES1373 chips are supported.
By specifying:
options
EAP_USE_BOTH_DACS
a second audio device is attached. This can be used for audio output simultaneously with the primary DAC. You can use it simply by directing audio output to the additional /dev/audioX device associated with it.
eap
device driver appeared in
NetBSD 1.4.
The EAP_USE_BOTH_DACS
option is rather
redundant after the introduction of the in-kernel audio mixer, and may be
removed in a future release. It is possible that it could be used to
accelerate mixing streams by taking advantage of the hardware's features,
but currently the additional (small) overhead of the kernel mixer is
impossible to bypass, since NetBSD no longer allows
userspace software to write directly to audio hardware. The
eap
hardware only features one clock, so generally
the second audio device must be configured in the same way as the first.
May 16, 2024 | NetBSD 9.4 |