!!################################ !!ALSA Information Script v 0.5.1 !!################################ !!Script ran on: Mon May 26 09:01:47 UTC 2025 !!Linux Distribution !!------------------ Debian GNU/Linux 12 \n \l PRETTY_NAME="Debian GNU/Linux 12 (bookworm)" NAME="Debian GNU/Linux" 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 !!--------------- !!Kernel Information !!------------------ Kernel release: 6.12.25 rpt-rpi-v8 Operating System: GNU/Linux Architecture: aarch64 Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k6.12.25 rpt-rpi-v8 Library version: 1.2.8 Utilities version: 1.2.8 !!Loaded ALSA modules !!------------------- snd_bcm2835 (card 0) snd_dummy (card 1) !!Sound Servers on this system !!---------------------------- PipeWire: Installed - Yes (/usr/bin/pipewire) Running - Yes Pulseaudio: Installed - Yes (/usr/bin/pulseaudio) Running - No !!Soundcards recognised by ALSA !!----------------------------- 0 [Headphones ]: bcm2835_headpho - bcm2835 Headphones bcm2835 Headphones 1 [Dummy ]: Dummy - Dummy Dummy 1 !!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 !!Module: snd_dummy enable : Y,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N fake_buffer : Y hrtimer : Y id : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null) index : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 mixer_volume_level_max : 100 mixer_volume_level_min : -50 model : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null) pcm_devs : 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 pcm_substreams : 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8 !!Sysfs card info !!--------------- !!Card: /sys/class/sound/card0 Driver: /sys/bus/vchiq-bus/drivers/bcm2835-audio Tree: /sys/class/sound/card0 |-- controlC0 | |-- dev | |-- device -> ../../card0 | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- device -> ../../../bcm2835-audio |-- id |-- 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/snd_dummy Tree: /sys/class/sound/card1 |-- controlC1 | |-- dev | |-- device -> ../../card1 | |-- power | |-- subsystem -> ../../../../../../class/sound | `-- uevent |-- device -> ../../../snd_dummy.0 |-- id |-- number |-- pcmC1D0c | |-- dev | |-- device -> ../../card1 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../class/sound | `-- uevent |-- 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 May 25 11:23 /dev/snd/controlC0 crw-rw---- 1 root audio 116, 6 May 25 11:23 /dev/snd/controlC1 crw-rw---- 1 root audio 116, 2 May 25 11:23 /dev/snd/pcmC0D0p crw-rw---- 1 root audio 116, 5 May 25 11:23 /dev/snd/pcmC1D0c crw-rw---- 1 root audio 116, 4 May 25 11:23 /dev/snd/pcmC1D0p crw-rw---- 1 root audio 116, 1 May 25 11:23 /dev/snd/seq crw-rw---- 1 root audio 116, 33 May 25 11:23 /dev/snd/timer /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 80 May 25 11:23 . drwxr-xr-x 3 root root 200 May 25 11:23 .. lrwxrwxrwx 1 root root 12 May 25 11:23 platform-fe00b840.mailbox -> ../controlC0 lrwxrwxrwx 1 root root 12 May 25 11:23 platform-snd_dummy.0 -> ../controlC1 !!ALSA configuration files !!------------------------ !!System wide config file (/etc/asound.conf) pcm.!default { type asym capture.pcm "mic" playback.pcm "speaker" } pcm.mic { type softvol slave { pcm "array" } control { name "MicArray Master" card "MATRIXIOSOUND" } } pcm.speaker { type plug slave { pcm "hw:0,0" } } pcm.array { type plug slave { pcm "hw:MATRIXIOSOUND" } } pcm.channel_1 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 0 } pcm.channel_2 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 1 } pcm.channel_3 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 2 } pcm.channel_4 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 3 } pcm.channel_5 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 4 } pcm.channel_6 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 5 } pcm.channel_7 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 6 } pcm.channel_8 { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings.0 7 } pcm.all_channels { type dsnoop ipc_key 234884 slave { pcm "hw:2,0" channels 8 } bindings { 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 } } !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** card 0: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones] Subdevices: 8/8 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 card 1: Dummy [Dummy], device 0: Dummy PCM [Dummy PCM] Subdevices: 8/8 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 **** card 1: Dummy [Dummy], device 0: Dummy PCM [Dummy PCM] Subdevices: 8/8 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 !!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 -1988 [78%] [-19.88dB] [on] !!-------Mixer controls for card Dummy Card sysdefault:1 'Dummy'/'Dummy 1' Mixer name : 'Dummy Mixer' Components : '' Controls : 11 Simple ctrls : 6 Simple mixer control 'Master',0 Capabilities: volume cswitch Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: -50 - 100 Front Left: 21 [47%] [-23.70dB] Capture [off] Front Right: 21 [47%] [-23.70dB] Capture [off] Simple mixer control 'Synth',0 Capabilities: volume cswitch Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: -50 - 100 Front Left: 0 [33%] [-30.00dB] Capture [off] Front Right: 0 [33%] [-30.00dB] Capture [off] Simple mixer control 'Line',0 Capabilities: volume cswitch Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: -50 - 100 Front Left: -50 [0%] [-45.00dB] Capture [off] Front Right: -50 [0%] [-45.00dB] Capture [off] Simple mixer control 'CD',0 Capabilities: volume cswitch Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: -50 - 100 Front Left: 0 [33%] [-30.00dB] Capture [off] Front Right: 0 [33%] [-30.00dB] Capture [off] Simple mixer control 'Mic',0 Capabilities: volume cswitch Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: -50 - 100 Front Left: 100 [100%] [0.00dB] Capture [on] Front Right: 100 [100%] [0.00dB] Capture [on] Simple mixer control 'External I/O Box',0 Capabilities: enum Items: 'None' 'CD Player' Item0: 'CD Player' !!Alsactl output !!-------------- --startcollapse-- state.Headphones { control.1 { iface MIXER name 'PCM Playback Volume' value -1988 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 -1988 } } control.2 { iface MIXER name 'PCM Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } } state.Dummy { control.1 { iface MIXER name 'Master Volume' value.0 21 value.1 21 comment { access 'read write' type INTEGER count 2 range '-50 - 100' dbmin -4500 dbmax 0 dbvalue.0 -2370 dbvalue.1 -2370 } } control.2 { iface MIXER name 'Master Capture Switch' value.0 false value.1 false comment { access 'read write' type BOOLEAN count 2 } } control.3 { iface MIXER name 'Synth Volume' value.0 0 value.1 0 comment { access 'read write' type INTEGER count 2 range '-50 - 100' dbmin -4500 dbmax 0 dbvalue.0 -3000 dbvalue.1 -3000 } } control.4 { iface MIXER name 'Synth Capture Switch' value.0 false value.1 false comment { access 'read write' type BOOLEAN count 2 } } control.5 { iface MIXER name 'Line Volume' value.0 -50 value.1 -50 comment { access 'read write' type INTEGER count 2 range '-50 - 100' dbmin -4500 dbmax 0 dbvalue.0 -4500 dbvalue.1 -4500 } } control.6 { iface MIXER name 'Line Capture Switch' value.0 false value.1 false comment { access 'read write' type BOOLEAN count 2 } } control.7 { iface MIXER name 'Mic Volume' value.0 100 value.1 100 comment { access 'read write' type INTEGER count 2 range '-50 - 100' dbmin -4500 dbmax 0 dbvalue.0 0 dbvalue.1 0 } } control.8 { iface MIXER name 'Mic Capture Switch' value.0 true value.1 true comment { access 'read write' type BOOLEAN count 2 } } control.9 { iface MIXER name 'CD Volume' value.0 0 value.1 0 comment { access 'read write' type INTEGER count 2 range '-50 - 100' dbmin -4500 dbmax 0 dbvalue.0 -3000 dbvalue.1 -3000 } } control.10 { iface MIXER name 'CD Capture Switch' value.0 false value.1 false comment { access 'read write' type BOOLEAN count 2 } } control.11 { iface MIXER name 'External I/O Box' value 'CD Player' comment { access 'read write' type ENUMERATED count 1 item.0 None item.1 'CD Player' } } } --endcollapse-- !!All Loaded Modules !!------------------ aes_arm64 aes_generic af_alg algif_hash algif_skcipher backlight bcm2835_codec bcm2835_isp bcm2835_mmal_vchiq bcm2835_v4l2 binfmt_misc bluetooth bnep brcmfmac brcmfmac_wcc brcmutil btbcm cfg80211 cmac dm_mod drm drm_panel_orientation_quirks ecc ecdh_generic fuse hci_uart i2c_bcm2835 i2c_dev ip_tables ipv6 joydev ledtrig_pattern libaes mc nvmem_rmem raspberrypi_gpiomem raspberrypi_hwmon rfcomm rfkill rpi_hevc_dec snd snd_bcm2835 snd_dummy snd_hrtimer snd_pcm snd_seq snd_seq_device snd_seq_dummy snd_timer spi_bcm2835 spidev uio uio_pdrv_genirq v4l2_mem2mem vc_sm_cma videobuf2_common videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_vmalloc videodev x_tables !!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 snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 bcm2708_fb.fbwidth=0 bcm2708_fb.fbheight=0 bcm2708_fb.fbswap=1 smsc95xx.macaddr=2C:CF:67:2A:93:F7 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=ttyS0,115200 console=tty1 root=PARTUUID=8d2e25e9-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles cfg80211.ieee80211_regdom=RO gpio=sysfsx [ 0.000000] cgroup: Disabling memory control group subsystem -- [ 2.854926] systemd[1]: Started systemd-journald.service - Journal Service. [ 2.869433] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 2.876308] bcm2835-audio bcm2835-audio: card created with 8 channels [ 2.891639] systemd-journald[257]: Received client request to flush runtime journal. !!Packages installed !!-------------------- ii alsa-topology-conf 1.2.5.1-2 all ALSA topology configuration files ii alsa-ucm-conf 1.2.8-1 all ALSA Use Case Manager configuration files ii alsa-utils 1.2.8-1 rpt1 arm64 Utilities for configuring and using ALSA