I've moved my Hifiberry DAC+ RTC over to a Raspberry Pi 4B running a reasonably fresh installation of Raspberry Pi OS Bookworm. The file /boot/firmware/config.txt includes the following:
The raspi-config utility can find the DAC+ under System Options -> Audio -> snd_rpi_hifiberry_dac
However, the pactl utility cannot find the DAC+ only the headphones. I would like to use the headphones for some audio and the DAC+ for other audio. How can I get pactl to be aware of the DAC+ first?
$ pactl list short sinks
0 alsa_output.platform-bcm2835_audio.analog-stereo module-alsa-card.c s16le 2ch 44100Hz SUSPENDED
1 alsa_output.platform-soc_sound.stereo-fallback module-alsa-card.c s16le 2ch 44100Hz SUSPENDED
Again, the idea would be to use both the headphone jack and the DAC+ for different outputs and have separate volume control for both.