[NOTE: Apologies for the paste, but for some reason the answer got deleted from askubuntu (This post is hidden. It was deleted 12 hours ago by fossfreedom♦. ...so much for "freedom" ; ) If someone can tell me why, I would appreciate it. I gave the answer (Rodecaster appears not to be supported) and showed a lot of debugging effort leading to that conclusion.]
I have the same issue... I tried many things, but could not get the Rodecaster working. I did learn quite a bit and got the Scarlett 2i2 working though. - lsusb Bus 001 Device 002: ID 19f7:0011 RODE Microphones RODECaster Pro - ls -al /dev/snd/by-id/ lrwxrwxrwx 1 root root 12 May 6 11:44 usb-RODE_Microphones_RODECaster_Pro_00000000001A-01 -> ../controlC2 - cat /proc/asound/cards 2 [Pro ]: USB-Audio - RODECaster Pro RODE Microphones RODECaster Pro at usb-0000:01:00.0-3, high speed - cat /proc/asound/modules 0 snd_usb_audio 1 snd_hda_intel - lsmod | grep snd_usb_audio looks OK - arecord --list-devices does not show it - aplay -L shows usbstream:CARD=Generic HD-Audio Generic USB Stream Output and a lot of other (normal motherboard) devices but nothing with Rode and nothing else USB - aplay --device=usbstream ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card aplay: main:828: audio open error: Invalid argument - cat /proc/asound/pcm does not show it - editing /etc/modprobe.d/alsa-base.conf to add these two lines at the end: options snd-usb-audio index=0 options snd-hda-intel index=1 ...but no change after a reboot. Idea from https://unix.stackexchange.com/questions/220224/alsa-not-detecting-my-soundcard - editing /etc/modprobe.d/alsa-base.conf to add options snd slots=snd-usb-audio,snd-hda-intel did not change anything either - blacklisting snd_hda_intel in /etc/modprobe.d/blacklist-sound.conf by adding blacklist snd_hda_intel to that file (create it if necessary) and rebooting disabled it, but did not help with the USB sound for the Rodecaster - pulseaudio -k && sudo alsa force-reload after the changes (instead of a reboot) doesn't change anything either. Note: pulseaudio restarts itself and does not need to be manually restarted (Is there another way to restart the sound system if pulseaudio/ALSA don't work?) The Answer (as it appears to me at least): - The Rodecaster is recognized as a USB device, but somehow not recognized by Alsa - I grabbed a Scarlett 2i2 gen3 (https://wiki.linuxaudio.org/wiki/hardware_support) - edited /etc/modprobe.d/alsa-base.conf to comment out #options snd-usb-audio index=-2 to allow snd-usb-audio to be the first device - edited /etc/modprobe.d/alsa-base.conf to add options snd slots=snd-usb-audio,snd-hda-intel at the end to have the USB audio before the HDA Intel - pulseaudio -k && sudo alsa force-reload to reload the alsa config Then the Scarlett showed up. Leaving the HDA Intel first did not let the Scarlett show up. Helpful info: - https://www.alsa-project.org/main/index.php/Help_To_Debug ...the alsa-info.sh looks like a fairly complete alsa debugging info summary generator - https://wiki.ubuntu.com/DebuggingSoundProblems - bug filed: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1877726 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1877726 Title: [HDA-Intel - HD-Audio Generic, playback] USB sound with Rodecaster Pro not working Status in alsa-driver package in Ubuntu: New Bug description: Please see https://askubuntu.com/questions/1229085/ubuntu-with-rodecaster-pro-usb-soundcard/1236257#1236257 for most background. tl;dr: - The Rodecaster Pro is a USB audio standard compliant device - lsusb sees it, but alsa cannot use it - trying the exact same setup with a Scarlett 2i2 USB device works (with some caveats, see the mentioned post) Somehow the Rodecaster is ignored by Alsa. I am more than happy to help debug. Alsa info is at http://alsa-project.org/db/?f=94fd609fa23912ab0a39b67676a026fd163f3f3b and also attached. nils@blackbox:~/tmp/soundtest$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: Generic_1 [HD-Audio Generic], device 0: ALC887-VD Analog [ALC887-VD Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: Generic_1 [HD-Audio Generic], device 1: ALC887-VD Digital [ALC887-VD Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: USB [Scarlett 2i2 USB], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 nils@blackbox:~/tmp/soundtest$ arecord --list-devices **** List of CAPTURE Hardware Devices **** card 0: Generic_1 [HD-Audio Generic], device 0: ALC887-VD Analog [ALC887-VD Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: Generic_1 [HD-Audio Generic], device 2: ALC887-VD Alt Analog [ALC887-VD Alt Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: USB [Scarlett 2i2 USB], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30 Uname: Linux 5.4.0-29-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: nils 90077 F.... pulseaudio /dev/snd/controlC0: nils 90077 F.... pulseaudio /dev/snd/controlC1: nils 90077 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: KDE Date: Sat May 9 11:45:20 2020 EcryptfsInUse: Yes InstallationDate: Installed on 2016-08-23 (1354 days ago) InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AudioUsers: pulse Symptom_Card: Family 17h (Models 10h-1fh) HD Audio Controller - HD-Audio Generic Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: nils 90077 F.... pulseaudio /dev/snd/controlC0: nils 90077 F.... pulseaudio /dev/snd/controlC1: nils 90077 F.... pulseaudio Symptom_Jack: SPDIF Out, Internal Symptom_Type: Sound works for some users but not for others Title: [HDA-Intel - HD-Audio Generic, playback] sound not working for all users UpgradeStatus: Upgraded to focal on 2020-05-09 (0 days ago) dmi.bios.date: 10/14/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5222 dmi.board.asset.tag: Default string dmi.board.name: PRIME A320M-A dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5222:bd10/14/2019:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEA320M-A:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: To be filled by O.E.M. dmi.product.name: System Product Name dmi.product.sku: SKU dmi.product.version: System Version dmi.sys.vendor: System manufacturer mtime.conffile..etc.modprobe.d.alsa-base.conf: 2020-05-09T11:23:29.080704 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1877726/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp