Argon BLSTR DAC detected but no audio

I can see that the BLSTR DAC is recognized but no audio comes out even when the snd_rpi_hifiberry_dacplus is selected through the sound profiles. I checked with a Qudelix USB DAC and it worked out-of-the-box without issues. Could this item be DOA?

Config.txt:

For more options and information see

http://rptl.io/configtxt

Some settings may impact device functionality. See link above for details

Uncomment some or all of these to enable the optional hardware interfaces

dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on

Enable audio (loads snd_bcm2835)

dtparam=audio=on

Additional overlays and parameters are documented

/boot/firmware/overlays/README

Automatically load overlays for detected cameras

camera_auto_detect=1

Automatically load overlays for detected DSI displays

display_auto_detect=1

Automatically load initramfs files, if found

auto_initramfs=1

Enable DRM VC4 V3D driver

dtoverlay=vc4-kms-v3d
max_framebuffers=2

Don’t have the firmware create an initial video= setting in cmdline.txt.

Use the kernel’s default instead.

disable_fw_kms_setup=1

Run in 64-bit mode

arm_64bit=1

Disable compensation for displays with overscan

disable_overscan=1

Run as fast as firmware / board allows

arm_boost=1

[cm4]

Enable host mode on the 2711 built-in XHCI USB controller.

This line should be removed if the legacy DWC2 controller is required

(e.g. for USB device mode) or if USB support is not required.

otg_mode=1

[all]

dtparam=uart0=on
dtparam=nvme
dtparam=pciex1_gen=3
max_usb_current=1
dtoverlay=hifiberry-dacplus,slave
dtoverlay=gpio-ir,gpio_pin=23

i2cdetect -y 1:
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – – – – – – – –
10: – – – – – – – – – – 1a – – – – –
20: – – – – – – – – – – – – – – – –
30: – – – – – – – – – – – – – – – –
40: – – – – – – – – – – – – – UU – –
50: – – – – – – – – – – – – – – – –
60: UU – – – – – – – – – – – – – – –
70: – – – – – – – –

pactl info:
Server String: /run/user/1000/pulse/native
Library Protocol Version: 35
Server Protocol Version: 35
Is Local: yes
Client Index: 13
Tile Size: 65472
User Name: kiley
Host Name: ProjectMAR
Server Name: pulseaudio
Server Version: 16.1
Default Sample Specification: s16le 2ch 44100Hz
Default Channel Map: front-left,front-right
Default Sink: alsa_output.platform-soc_sound.stereo-fallback
Default Source: alsa_output.platform-soc_sound.stereo-fallback.monitor
Cookie: 8d39:ea04