On Tue, May 12, 2020 at 10:13:10PM +0530, Subhashini Rao Beerisetty wrote: > Hi all, > > In my Linux machine, I connected the plantronics usb headset with mic > and I see(with the help of dmesg) that this device detected. > > > > [116676.507868] usb 2-2: new full-speed USB device number 5 using xhci_hcd > [116676.923445] usb 2-2: New USB device found, idVendor=047f, idProduct=c012 > [116676.927091] usb 2-2: New USB device strings: Mfr=1, Product=2, > SerialNumber=0 > [116676.934252] usb 2-2: Product: Plantronics .Audio 628 USB > [116676.941445] usb 2-2: Manufacturer: Plantronics > [116676.945731] usb 2-2: ep 0x84 - rounding interval to 64 > microframes, ep desc says 80 microframes > [116677.078071] hidraw: raw HID events driver (C) Jiri Kosina > [116677.159669] usbcore: registered new interface driver usbhid > [116677.161686] usbhid: USB HID core driver > [116677.175458] input: Plantronics Plantronics .Audio 628 USB as > /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.3/0003:047F:C012.0001/input/input4 > [116677.234588] plantronics 0003:047F:C012.0001: > input,hiddev0,hidraw0: USB HID v1.00 Device [Plantronics Plantronics > .Audio 628 USB] on usb-0000:00:14.0-2/input3 > [116677.281756] usbcore: registered new interface driver snd-usb-audio > > The following nodes are present in the /dev/snd > > $ ls -l /dev/snd/ > > total 0 > > drwxr-xr-x 2 root root 60 May 12 11:32 by-id > > drwxr-xr-x 2 root root 60 May 12 11:32 by-path > > crw-rw---- 1 root audio 116, 2 May 12 11:32 controlC1 > > crw-rw---- 1 root audio 116, 4 May 12 11:32 pcmC1D0c > > crw-rw---- 1 root audio 116, 3 May 12 11:32 pcmC1D0p > > crw-rw---- 1 root audio 116, 1 May 12 11:32 seq > > crw-rw---- 1 root audio 116, 33 May 12 11:32 timer > > > > What are all these devices present in /dev/snd > > How do I use it for playing and recording an audio? > > Basically first I want to gain knowledge on set of test cases I can > run on ALSA and then learn ALSA kernel modules stuff including > snd_usb_audio mdule. > > So please guide me by providing related documentation/Steps. ALSA should "just work" with this device, no need to do anything to the kernel driver. Does it not work properly for you as-is? thanks, greg k-h
