Hello, (see https://store.sure-electronics.com/product/AA-KA32473 ) FYI: working with standard USB audio mode, But since it claims to be a "8 x 50W 6.1, 4.2, 4.0 Configurable USB Codec Input Audio Amplifier Board" the modes are not respected, which can be configured via switches on the Amplifier board. ALSA Channels names (speaker-test): Front Left - Front Right - Rear Left - Rear Right - Front Center - Woofer - Side Left - Side Right Input to KAB9 has differential Input feed by USB-AUDIO Interface with channel numbers: IN1L+,IN1L-,IN1R+, ...,IN8R- Signal are clean as differential signals (measured on speaker) ALSA channel order stereo mode: IN1 = 3, IN2=4, IN3=7, IN4=8, IN5=5, IN6=6, IN7=1, IN8=2 ALSA channel numbers mono mode: channel 1 = IN2 = 4, channel 2 = IN4 = 8, channel 3 = IN6=6, channel 4 = IN8=2 Questions: - How to correct channel order ? - How to switch between Mono und Stereo Mode on driver side maybe a module argument ? Additionally on alsamixer there are all input parameter of the CM6206, but Card has only outputs... Anyway thanks ALSA and USB Audio standard I can used it, but any hints how to make it more intuitively usable is appreciated. mfG Winfried Addendum: here the Info for the test: | Computer | Linux Debian system | |-|-| |Notebook | Debian 11 linux-5.10.0-20-rt-amd64 | | embedded | | | USB-AUDIO | CM6206 chip - wondom module | | amplifier | wondom KAB9 https://store.sure-electronics.com/product/AA-KA32473 | Boot-Messages [399312.935630] usb 6-2: new full-speed USB device number 11 using xhci_hcd [399313.100653] usb 6-2: New USB device found, idVendor=0d8c, idProduct=0102, bcdDevice= 0.10 [399313.100661] usb 6-2: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [399313.100665] usb 6-2: Product: USB Sound Device [399313.186887] usb 6-2: current rate 30464 is different from the runtime rate 96000 [399313.232711] usb 6-2: Warning! Unlikely big volume range (=8065), cval- >res is probably wrong. [399313.232717] usb 6-2: [9] FU [Mic Playback Volume] ch = 2, val = -6144/1921/1 [399313.256834] usb 6-2: Warning! Unlikely big volume range (=8065), cval- >res is probably wrong. [399313.256841] usb 6-2: [11] FU [Line Playback Volume] ch = 2, val = -6144/1921/1 [399313.318887] usb 6-2: Warning! Unlikely big volume range (=6928), cval- >res is probably wrong. [399313.318893] usb 6-2: [8] FU [Mic Capture Volume] ch = 2, val = -4096/2832/1 [399313.342695] usb 6-2: Warning! Unlikely big volume range (=6928), cval- >res is probably wrong. [399313.342701] usb 6-2: [15] FU [Line Capture Volume] ch = 2, val = -4096/2832/1 [399313.366704] usb 6-2: Warning! Unlikely big volume range (=6928), cval- >res is probably wrong. [399313.366710] usb 6-2: [2] FU [PCM Capture Volume] ch = 2, val = -4096/2832/1 [399313.372016] input: USB Sound Device as /devices/ pci0000:00/0000:00:08.1/0000:06:00.4/usb6/6-2/6-2:1.3/0003:0D8C:0102.0022/ input/input82 [399313.431830] hid-generic 0003:0D8C:0102.0022: input,hidraw0: USB HID v1.00 Device [USB Sound Device ] on usb-0000:06:00.4-2/input3 alsa device: Karte 3: ICUSBAUDIO7D [ICUSBAUDIO7D], Gerät 0: USB Audio [USB Audio] Sub-Geräte: 1/1 Sub-Gerät #0: subdevice #0 alsa interfaces: hw:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio Direct hardware device without any conversions plughw:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio Hardware device with all software conversions sysdefault:CARD=ICUSBAUDIO7D ICUSBAUDIO7D, USB Audio Default Audio Device front:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio Front output / input surround21:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio 4.0 Surround output to Front and Rear speakers surround41:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio IEC958 (S/PDIF) Digital Audio Output dmix:CARD=ICUSBAUDIO7D,DEV=0 ICUSBAUDIO7D, USB Audio Direct sample mixing device usbstream:CARD=ICUSBAUDIO7D ICUSBAUDIO7D USB Stream Output _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
