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10-Dec-2020

3. Configuring Linux for the IQaudio sound card

All our latest full size audio boards include a pre-programmed EEPROM. This allows Raspberry Pi

OS to auto detect and auto configure itself allowing the IQaudio boards to be plug and play.

If you need to configure Raspberry Pi OS yourself, you can edit the boot configuration file (found at

/boot/config.txt) to manually add the appropriate device-tree overlay:

IQaudio Card

/boot/config.txt

DAC+

dtoverlay=iqaudio-dacplus

DAC PRO

dtoverlay=iqaudio-dacplus

DigiAMP+

dtoverlay=iqaudio-dacplus,unmute_amp

or

dtoverlay=iqaudio-dacplus,auto_mute_amp

Codec Zero

dtoverlay=iqaudio-codec

Disabling the standard Raspberry Pi On-Board Audio

To make your IQaudio sound card the primary audio device in Raspberry Pi OS you will need to

disable the Raspberry

Pi’s on-board audio card. This is done simply by commenting out the

dtparam=audio=on device tree parameter on your sd

card’s /boot/config.txt file by placing a # at the

start of the line, saving the file and rebooting your Pi.

/boot/config.txt should have the following entry to disable the

Pi’s on-board sound card.

#dtparam=audio=on