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SND_ES137X(4)		 BSD Kernel Interfaces Manual		 SND_ES137X(4)

NAME
     snd_es137x — Ensoniq AudioPCI ES137x bridge device driver

SYNOPSIS
     To compile this driver into the kernel, place the following lines in your
     kernel configuration file:

	   device sound
	   device snd_es137x

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

	   snd_es137x_load="YES"

DESCRIPTION
     The snd_es137x bridge driver allows the generic audio driver sound(4) to
     attach to the Ensoniq 137x audio cards.

   Runtime Configuration
     The following sysctl(8) variables are available in addition to those
     available to all sound(4) devices:

	   hw.snd.pcm%d.latency_timer  Controls the PCI latency timer setting.
				       Increasing this value will solve most
				       popping and crackling issues (espe‐
				       cially on VIA motherboards).

	   hw.snd.pcm%d.spdif_enabled  Enables S/PDIF output on the primary
				       playback channel.  This sysctl(8) vari‐
				       able is available only if the device is
				       known to support S/PDIF output.

	   dev.pcm.%d.polling	       Experimental polling mode, where the
				       driver operates by querying the device
				       state on each tick using callout(9).
				       Polling is disabled by default.	Do not
				       enable it unless you are facing weird
				       interrupt problems or if the device
				       cannot generate interrupts at all.

HARDWARE
     The snd_es137x driver supports the following sound cards:

     ·	 Creative CT5880-A
     ·	 Creative CT5880-C
     ·	 Creative CT5880-D
     ·	 Creative CT5880-E
     ·	 Creative SB AudioPCI CT4730
     ·	 Ensoniq AudioPCI ES1370
     ·	 Ensoniq AudioPCI ES1371-A
     ·	 Ensoniq AudioPCI ES1371-B
     ·	 Ensoniq AudioPCI ES1373-A
     ·	 Ensoniq AudioPCI ES1373-B
     ·	 Ensoniq AudioPCI ES1373-8

SEE ALSO
     sound(4)

HISTORY
     The snd_es137x device driver first appeared in FreeBSD 4.0.

AUTHORS
     Russell Cattelan ⟨cattelan@thebarn.com⟩
     Cameron Grant ⟨cg@FreeBSD.org⟩
     Joachim Kuebart
     Jonathan Noack ⟨noackjr@alumni.rice.edu⟩

BSD			       November 29, 2006			   BSD

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