!!################################ !!ALSA Information Script v 0.5.3 !!################################ !!Script ran on: Wed Mar 25 22:05:46 UTC 2026 !!Linux Distribution !!------------------ Debian GNU/Linux 13 \n \l PRETTY_NAME="Debian GNU/Linux 13 (trixie)" NAME="Debian GNU/Linux" DEBIAN_VERSION_FULL=13.4 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 1:6.12.62-1 rpt1 (2025-12-18) Operating System: GNU/Linux Architecture: aarch64 Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k6.12.62 rpt-rpi-v8 Library version: Utilities version: 1.2.14 !!Loaded ALSA modules !!------------------- vc4 (card 0) snd_soc_audio_graph_card (card 1) !!Sound Servers on this system !!---------------------------- No sound servers found. !!Soundcards recognised by ALSA !!----------------------------- 0 [vc4hdmi ]: vc4-hdmi - vc4-hdmi vc4-hdmi 1 [Katana ]: Allo_Katana - Allo Katana Allo Katana !!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_hdmi=0 !!Loaded sound module options !!--------------------------- !!Module: vc4 fkms_max_refresh_rate : 85 force_hotplug : 0 tv_norm : !!Module: snd_soc_audio_graph_card * : !!Sysfs card info !!--------------- !!Card: /sys/class/sound/card0 Driver: /sys/bus/platform/drivers/vc4_hdmi Tree: /sys/class/sound/card0 |-- controlC0 | |-- dev | |-- device -> ../../card0 | |-- power | |-- subsystem -> ../../../../../../../class/sound | `-- uevent |-- device -> ../../../3f902000.hdmi |-- id |-- input1 | |-- capabilities | |-- device -> ../../card0 | |-- event1 | |-- id | |-- inhibited | |-- modalias | |-- name | |-- phys | |-- power | |-- properties | |-- subsystem -> ../../../../../../../class/input | |-- uevent | `-- uniq |-- number |-- pcmC0D0p | |-- dev | |-- device -> ../../card0 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../../class/sound | `-- uevent |-- power | |-- autosuspend_delay_ms | |-- control | |-- runtime_active_time | |-- runtime_status | `-- runtime_suspended_time |-- subsystem -> ../../../../../../class/sound `-- uevent !!Card: /sys/class/sound/card1 Driver: /sys/bus/platform/drivers/asoc-audio-graph-card Tree: /sys/class/sound/card1 |-- controlC1 | |-- dev | |-- device -> ../../card1 | |-- power | |-- subsystem -> ../../../../../../../class/sound | `-- uevent |-- device -> ../../../soc:sound |-- id |-- number |-- pcmC1D0p | |-- dev | |-- device -> ../../card1 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../../class/sound | `-- uevent |-- power | |-- autosuspend_delay_ms | |-- control | |-- runtime_active_time | |-- runtime_status | `-- runtime_suspended_time |-- subsystem -> ../../../../../../class/sound `-- uevent !!ALSA Device nodes !!----------------- crw-rw---- 1 root audio 116, 3 Mar 24 21:06 /dev/snd/controlC0 crw-rw---- 1 root audio 116, 5 Mar 24 21:06 /dev/snd/controlC1 crw-rw---- 1 root audio 116, 2 Mar 24 21:06 /dev/snd/pcmC0D0p crw-rw---- 1 root audio 116, 4 Mar 24 21:06 /dev/snd/pcmC1D0p crw-rw---- 1 root audio 116, 1 Mar 24 21:06 /dev/snd/seq crw-rw---- 1 root audio 116, 33 Mar 24 21:06 /dev/snd/timer /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 80 Mar 24 21:06 . drwxr-xr-x 3 root root 180 Mar 24 21:06 .. lrwxrwxrwx 1 root root 12 Mar 24 21:06 platform-3f902000.hdmi -> ../controlC0 lrwxrwxrwx 1 root root 12 Mar 24 21:06 platform-soc:sound -> ../controlC1 !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** card 0: vc4hdmi [vc4-hdmi], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: Katana [Allo Katana], device 0: bcm2835-i2s-allo-katana-codec allo-katana-codec-0 [bcm2835-i2s-allo-katana-codec allo-katana-codec-0] Subdevices: 1/1 Subdevice #0: subdevice #0 ARECORD **** List of CAPTURE Hardware Devices **** !!Amixer output !!------------- !!-------Mixer controls for card vc4hdmi Card sysdefault:0 'vc4hdmi'/'vc4-hdmi' Mixer name : '' Components : '' Controls : 5 Simple ctrls : 0 !!-------Mixer controls for card Katana Card sysdefault:1 'Katana'/'Allo Katana' Mixer name : '' Components : '' Controls : 6 Simple ctrls : 4 Simple mixer control 'Master',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Mono: Front Left: Playback 255 [100%] [0.00dB] [on] Front Right: Playback 255 [100%] [0.00dB] [on] Simple mixer control 'DSP Program',0 Capabilities: enum Items: 'Linear Phase Fast Roll-off Filter' 'Linear Phase Slow Roll-off Filter' 'Minimum Phase Fast Roll-off Filter' 'Minimum Phase Slow Roll-off Filter' 'Apodizing Fast Roll-off Filter' 'Corrected Minimum Phase Fast Roll-off Filter' 'Brick Wall Filter' Item0: 'Minimum Phase Slow Roll-off Filter' Simple mixer control 'Deemphasis',0 Capabilities: enum Items: 'Bypass' '32kHz' '44.1kHz' '48kHz' Item0: '44.1kHz' Simple mixer control 'DoP',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on] !!Alsactl output !!-------------- --startcollapse-- state.vc4hdmi { control.1 { iface CARD name 'HDMI Jack' value false comment { access read type BOOLEAN count 1 } } control.2 { iface PCM name 'Playback Channel Map' value.0 0 value.1 0 value.2 0 value.3 0 value.4 0 value.5 0 value.6 0 value.7 0 comment { access 'read volatile' type INTEGER count 8 range '0 - 36' } } control.3 { iface PCM name 'IEC958 Playback Mask' value ffffffffffffffffffffffffffffffffffffffffffffffff0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 comment { access read type IEC958 count 1 } } control.4 { iface PCM name 'IEC958 Playback Default' value '0400000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read write' type IEC958 count 1 } } control.5 { iface PCM name ELD value '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read volatile' type BYTES count 128 } } } state.Katana { control.1 { iface MIXER name 'Master Playback Volume' value.0 255 value.1 255 comment { access 'read write' type INTEGER count 2 range '0 - 255' dbmin -12750 dbmax 0 dbvalue.0 0 dbvalue.1 0 } } control.2 { iface MIXER name 'Master Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } control.3 { iface MIXER name 'DSP Program Route' value 'Minimum Phase Slow Roll-off Filter' comment { access 'read write' type ENUMERATED count 1 item.0 'Linear Phase Fast Roll-off Filter' item.1 'Linear Phase Slow Roll-off Filter' item.2 'Minimum Phase Fast Roll-off Filter' item.3 'Minimum Phase Slow Roll-off Filter' item.4 'Apodizing Fast Roll-off Filter' item.5 'Corrected Minimum Phase Fast Roll-off Filter' item.6 'Brick Wall Filter' } } control.4 { iface MIXER name 'Deemphasis Route' value '44.1kHz' comment { access 'read write' type ENUMERATED count 1 item.0 Bypass item.1 '32kHz' item.2 '44.1kHz' item.3 '48kHz' } } control.5 { iface MIXER name 'DoP Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } control.6 { iface MIXER name Master value.0 255 value.1 255 comment { access 'read write user' type INTEGER count 2 range '0 - 255' tlv '0000000100000008ffffec1400000014' dbmin -5100 dbmax 0 dbvalue.0 0 dbvalue.1 0 } } } --endcollapse-- !!All Loaded Modules !!------------------ backlight bcm2835_codec bcm2835_isp bcm2835_mmal_vchiq bcm2835_v4l2 binfmt_misc brcmfmac brcmfmac_wcc brcmutil cec cfg80211 dm_mod drm drm_display_helper drm_dma_helper drm_kms_helper drm_panel_orientation_quirks fuse i2c_bcm2835 i2c_dev ip_tables ipv6 lz4_compress mc nfnetlink raspberrypi_gpiomem raspberrypi_hwmon regmap_i2c rfkill sch_fq_codel snd snd_bcm2835 snd_compress snd_pcm snd_pcm_dmaengine snd_soc_allo_katana_codec snd_soc_audio_graph_card snd_soc_bcm2835_i2s snd_soc_core snd_soc_hdmi_codec snd_soc_simple_card_utils snd_timer uio uio_pdrv_genirq v4l2_mem2mem vc4 vc_sm_cma videobuf2_common videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_vmalloc videodev x_tables zram !!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 snd_bcm2835.enable_hdmi=0 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=ttyAMA0,115200 console=tty1 root=PARTUUID=ce2b1715-02 rootfstype=ext4 fsck.repair=yes rootwait cfg80211.ieee80211_regdom=SI [ 0.000000] cgroup: Disabling memory control group subsystem -- [ 10.384411] mc: Linux media interface: v0.10 [ 10.416825] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 10.518217] videodev: Linux video capture interface: v2.00 -- [ 11.081865] input: vc4-hdmi as /devices/platform/soc/3f902000.hdmi/rc/rc0/input0 [ 11.132580] input: vc4-hdmi HDMI Jack as /devices/platform/soc/3f902000.hdmi/sound/card0/input1 [ 11.137598] vc4-drm soc:gpu: bound 3f902000.hdmi (ops vc4_hdmi_ops [vc4]) !!Packages installed !!-------------------- ii alsa-topology-conf 1.2.5.1-3 all ALSA topology configuration files ii alsa-ucm-conf 1.2.14-1 all ALSA Use Case Manager configuration files ii alsa-utils 1.2.14-1 rpt1 arm64 Utilities for configuring and using ALSA hi bluez-alsa-utils 4.3.1-3 arm64 Bluetooth Audio ALSA Backend (utils)