Audio

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This page lists available options to get sound input and output on the UP/UP^2 board.

Up board

HDMI audio

Audio output through HDMI and DP works on both Windows and ubilinux. Ubuntu 14.04 (Trusty Tahr) isn't supported, as it's currently running an older version of the kernel. Ubuntu HDMI audio support is supported on our kernel (4.10) on the 16.04 (Xenial Xerus).

If you switch from Ubilinux to Windows or vice versa and you need audio over the HDMI you will also need to change the audio setting in BIOS, to do this:

  • Press DEL during boot.
  • It will ask for a bios password but you can leave this blank and press enter.

For audio in Windows:

  • Navigate to the “Chipset” Tab
  • Choose “South Bridge”
  • Choose “HD-Audio Configuration”
  • Set HD-Audio DSP to “[Disable]”

For audio in Ubilinux:

  • Navigate to the “Chipset” Tab
  • Choose “South Bridge”
  • Choose “HD-Audio Configuration”
  • Set HD-Audio DSP to “[Enable]”

I²S

The 40-pin GPIO header has pins connected to I2S for audio. Support is planned, but currently unavailable on official releases.

Analog USB adapters

Analog audio USB adapters should work out of the box. If a detected adapter is not producing any sound, check that the audio levels are correct, and that the right card is selected from your system mixer panel or audio application settings.

Verified on UP

  • Texas Instruments PCM2912A
  • CSL Computer GmbH Mod-Nr.: 20613

UP^2 board

HDMI audio

Audio output through HDMI and display port works on both Windows and ubilinux.

I²S

The 40-pin GPIO header and the exHAT has pins connected to I2S for audio. Support is planned, but currently unavailable on official releases.

We are waiting for Intel Support of Apollo Lake and Cherry Trail platform on Linux (planned on 4.13 kernel).