esa(4)

esa4

Ess technology allegro-1/maestro-3 family audio device

Usage

esa* at pci? audio* at esa?

Overview

The esa driver provides support for the ESS Allegro-1 and Maestro-3 audio devices on the PCI bus. These devices are popular in laptop systems.

The Allegro-1 and the Maestro-3 are full-duplex devices that allow independent playback and recording at sample rates between 8000Hz and 48000Hz and are capable of playback at 8 and 16 bit in mono and stereo.

Releases

51 releases since OpenBSD 3.1; the text changed 7 times.

  1. 3.1
  2. 3.2
  3. 3.3–3.6
  4. 3.7
  5. 3.8–3.9
  6. 4.0–4.1
  7. 4.2–5.3
  8. 5.4–8.0

History

The esa device driver appeared in OpenBSD 3.1.

Authors

Jared D. McNeill ⟨[email protected]⟩

Bugs

Hardware volume control is not yet supported by this driver.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.