| 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_DACSa 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 10.1 |