---
name: "snd_es137x"
section: "4freebsd"
platform: "linux"
package: "freebsd-manpages"
version: "12.2-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/snd_es137x/4freebsd"
---

# snd\_es137x(4freebsd)

Ensoniq AudioPCI ES137x bridge device driver

## 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)](/loader.conf/5.md):

```
snd_es137x_load="YES"
```

## DESCRIPTION

The **snd\_es137x** bridge driver allows the generic audio driver [sound(4)](/sound/4.md) to attach to the Ensoniq 137x audio cards.

### Runtime Configuration

The following [sysctl(8)](/sysctl/8.md) variables are available in addition to those available to all [sound(4)](/sound/4.md) devices:

- *hw.snd.pcm%d.latency\_timer*

  Controls the PCI latency timer setting. Increasing this value will solve most popping and crackling issues (especially on VIA motherboards).

- *hw.snd.pcm%d.spdif\_enabled*

  Enables S/PDIF output on the primary playback channel. This [sysctl(8)](/sysctl/8.md) variable 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)](/callout/9.md). 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)](/sound/4.md)

## 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*⟩