Yannick Adam

The sound quality cannot be compared to the RPi3. It is much better. Obviously an external DAC would give even better sound, but I am trying to reduce the BoM for an industrial project.

Hi! Unless mistaken, I believe audio is missing from 3.5mm jack on the RockPi4b. To enable it, I had: - To update the dts by adding definitions close to the RockPro64 (some available starting in mainline 5.6) - Change them to use I2S0 instead of I2S1 - Enable audio-graph-card in kernel config (I also removed some audio modules which issued warnings/errors during boot) - Patch es8316.c to prevent a kernel panic during boot (found in Ayufan's latest mainline kernel for RockPro64) yannick@rockpi-4b:~$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: rockchiprk3399 [rockchip,rk3399], device 0: ff880000.i2s-ES8316 HiFi ES8316 HiFi-0 [ff880000.i2s-ES8316 HiFi ES8316 HiFi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: hdmisound [hdmi-sound], device 0: ff8a0000.i2s-i2s-hifi i2s-hifi-0 [ff8a0000.i2s-i2s-hifi i2s-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 And finally, activate the proper DACs with amixer: amixer set 'Right Headphone Mixer Right DAC' on amixer set 'Left Headphone Mixer Left DAC' on Would you like a PR for this? Cheers, and thanks for your work on Armbian!