!!################################ !!ALSA Information Script v 0.5.3 !!################################ !!Script ran on: Sun Jun 7 19:15:16 UTC 2026 !!Linux Distribution !!------------------ Debian GNU/Linux 13 \n \l PRETTY_NAME="Debian GNU/Linux 13 (trixie)" NAME="Debian GNU/Linux" DEBIAN_VERSION_FULL=13.5 ID=debian HOME_URL="https://www.debian.org/" SUPPORT_URL="https://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" !!DMI Information !!--------------- Manufacturer: Product Name: Product Version: Firmware Version: System SKU: Board Vendor: Board Name: !!ACPI Device Status Information !!--------------- !!ACPI SoundWire Device Status Information !!--------------- !!Kernel Information !!------------------ Kernel release: #1 SMP PREEMPT Debian 1:6.18.33-1 rpt1 (2026-06-01) Operating System: GNU/Linux Architecture: aarch64 Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k6.18.33 rpt-rpi-v8 Library version: Utilities version: 1.2.14 !!Loaded ALSA modules !!------------------- snd_bcm2835 (card 0) !!Sound Servers on this system !!---------------------------- No sound servers found. !!Soundcards recognised by ALSA !!----------------------------- 0 [Headphones ]: bcm2835_headpho - bcm2835 Headphones bcm2835 Headphones !!PCI Soundcards installed in the system !!-------------------------------------- !!Modprobe options (Sound related) !!-------------------------------- snd_pcsp: index=-2 snd_atiixp_modem: index=-2 snd_intel8x0m: index=-2 snd_via82xx_modem: index=-2 snd_bcm2835: enable_headphones=0 snd_bcm2835: enable_headphones=1 snd_bcm2835: enable_hdmi=1 !!Loaded sound module options !!--------------------------- !!Module: snd_bcm2835 enable_hdmi : Y enable_headphones : Y force_bulk : N num_channels : 8 !!Sysfs card info !!--------------- !!Card: /sys/class/sound/card0 Driver: /sys/bus/vchiq-bus/drivers/bcm2835-audio Tree: !!ALSA Device nodes !!----------------- crw-rw---- 1 root audio 116, 3 Jun 7 21:06 /dev/snd/controlC0 crw-rw---- 1 root audio 116, 2 Jun 7 21:06 /dev/snd/pcmC0D0p crw-rw---- 1 root audio 116, 1 Jun 7 21:06 /dev/snd/seq crw-rw---- 1 root audio 116, 33 Jun 7 21:06 /dev/snd/timer /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 60 Jun 7 21:06 . drwxr-xr-x 3 root root 140 Jun 7 21:06 .. lrwxrwxrwx 1 root root 12 Jun 7 21:06 platform-fe00b840.mailbox -> ../controlC0 !!ALSA configuration files !!------------------------ !!System wide config file (/etc/asound.conf) pcm.!default { type hw card 0 device 0 } ctl.!default { type hw card 0 } !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** card 0: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones] Subdevices: 7/8 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 Subdevice #4: subdevice #4 Subdevice #5: subdevice #5 Subdevice #6: subdevice #6 Subdevice #7: subdevice #7 ARECORD **** List of CAPTURE Hardware Devices **** !!Amixer output !!------------- !!-------Mixer controls for card Headphones Card sysdefault:0 'Headphones'/'bcm2835 Headphones' Mixer name : 'Broadcom Mixer' Components : '' Controls : 2 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback 121 [97%] [1.21dB] [on] !!Alsactl output !!-------------- --startcollapse-- state.Headphones { control.1 { iface MIXER name 'PCM Playback Volume' value 121 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 121 } } control.2 { iface MIXER name 'PCM Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } } --endcollapse-- !!All Loaded Modules !!------------------ backlight bcm2835_codec bcm2835_mmal_vchiq binfmt_misc bluetooth brcmfmac brcmfmac_cyw brcmutil btbcm cec cfg80211 drm drm_client_lib drm_display_helper drm_dma_helper drm_exec drm_kms_helper drm_panel_orientation_quirks drm_shmem_helper ecc ecdh_generic fuse gpu_sched hci_uart ipv6 joydev libsha1 mc nfnetlink nvmem_rmem raspberrypi_gpiomem raspberrypi_hwmon raspberrypi_ts rfkill rpi_backlight rpi_hevc_dec snd snd_bcm2835 snd_compress snd_pcm snd_pcm_dmaengine snd_soc_core snd_soc_hdmi_codec snd_timer v3d v4l2_mem2mem vc4 vc_sm_cma videobuf2_common videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videodev !!ALSA/HDA dmesg !!-------------- [ 0.000000] alternatives: applying boot alternatives [ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=1 snd_bcm2835.enable_headphones=0 cgroup_disable=memory numa_policy=interleave nvme.max_host_mem_size_mb=32 snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 clk_ignore_unused numa=fake=2 system_heap.max_order=0 iommu_dma_numa_policy=interleave smsc95xx.macaddr=DC:A6:32:22:68:75 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 root=PARTUUID=b3155547-02 rootfstype=ext4 rootwait fsck.repair=yes net.ifnames=0 logo.nologo console=ttyS0,115200 console=tty1 [ 0.000000] cgroup: Disabling memory control group subsystem -- [ 7.886635] videodev: Linux video capture interface: v2.00 [ 7.944921] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 7.956110] v3d fec00000.v3d: [drm] Transparent Hugepage support is recommended for optimal performance on this platform! [ 7.960698] bcm2835-audio bcm2835-audio: card created with 8 channels [ 7.970434] [drm] Initialized v3d 1.0.0 for fec00000.v3d on minor 0 !!Packages installed !!-------------------- ii alsa-utils 1.2.14-1 rpt1 arm64 Utilities for configuring and using ALSA