Configuring Linux 4.x or higher

 

Configuring Linux 4.x or higher

While the drivers for the HiFiBerry boards are already included in the Raspberry Pi Linux kernel. However, to activate them, additional configurations called device tree overlays are needed. You might also need to disable the onboard sound and add an ALSA configuration as some applications will require it.

Remove the driver for the onboard sound

Remove the line

dtparam=audio=on

from /boot/config.txt if it exists.

Configure device tree overlay file

You don’t have to edit /etc/modules anymore, but need to load the correct device tree file. To do this, you must edit /boot/config.txt and add the following line

DAC for Raspberry Pi 1/DAC+ Light/DAC Zero/MiniAmp/Beocreate/DAC+ DSP/DAC+ RTC

dtoverlay=hifiberry-dac

DAC+ Standard/Pro/Amp2

dtoverlay=hifiberry-dacplus

DAC2 HD

dtoverlay=hifiberry-dacplushd

DAC+ ADC

dtoverlay=hifiberry-dacplusadc

DAC+ ADC Pro

dtoverlay=hifiberry-dacplusadcpro

Digi+

dtoverlay=hifiberry-digi

Digi+ Pro

dtoverlay=hifiberry-digi-pro

Amp+ (not Amp2!)

dtoverlay=hifiberry-amp

In the future it will be possible to automatically detect the DAC+/Digi+ boards based on the information stored in the EEPROM on the card. However we need to implement this first.

Linux 5.4 and higher

Linux 5.4 has changed some internal structures that make it incompatible with device-tree overlays of previous versions. Therefore, the hardware configuration that
is stored in the onboard EEPROM of some HiFiBerry cards (e.g. DAC+ Pro) might not load correctly. You can read more about this on our blog.

If you have configured the correct overlay, but the system still doesn’t load the driver, this might be caused by these changes.

In this case, you need to disable the onboard EEPROM by adding

force_eeprom_read=0

to your config.txt file.

Configure ALSA (optional)

Create /etc/asound.conf with the following content:

pcm.!default {
  type hw card 0
}
ctl.!default {
  type hw card 0
}

Make sure you have no .asound.conf file with different settings in your home directory (you might simply delete it if there is one). Reboot again now.

Test it

Check, if the sound card is enabled with “aplay”:

pi@raspberrypi ~ $ aplay -l
**** List of PLAYBACK Hardware Devices **** card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

This should work as root but also with the default “pi” user of Raspbian. If you created another user, make sure it is part of the “audio” group, otherwise it won’t be able to access the sound card and aplay won’t list it.

You can use aplay, to playback a WAV file. Note that aplayer won’t convert files that are in a format that is not natively supported from our drivers. (e.g. mono files or different sample rates). For other file formats (MP3, FLAC, …) We recommend to use mplayer.

sudo apt-get install mplayer

Some users have reported problems with MP3 playback of mplayer. It seems, that the MP3 codec is not installed by default on all systems. We found the FLAC format to be best supported by mplayer.

Depending of the board you’re using it will show another HiFiBerry sound card (DAC,DAC+, Digi or Amp)

Device not recognised?

This could be caused by typos in config.txt or blacklisted drivers. Add

dtdebug=1

to your config.txt. Have a look at the output of

dmesg

and the output of

sudo vcdbg log msg

Last updated: August 25, 2020