x6100 usb-audio and usb devices

x6100_usb_audio-usb.txt

WSJT Radio control goes over /dev/ttyACM1  

WSJT Audio configuration with loopback USB cable plugged:
Input  plughw:CARD=Device,DEV=0
Output  plughw:CARD=Device,DEV=0





TLDR; 
### who is using sound ?
root@x6100:~# lsof /dev/snd/*
COMMAND    PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
gst-launc 1070 root  mem    CHR 116,24          1647 /dev/snd/pcmC0D0c
gst-launc 1070 root    8r   CHR 116,33      0t0 1643 /dev/snd/timer
gst-launc 1070 root    9u   CHR 116,24      0t0 1647 /dev/snd/pcmC0D0c
gst-launc 1071 root  mem    CHR 116,24          1647 /dev/snd/pcmC0D0c
gst-launc 1071 root   10r   CHR 116,33      0t0 1643 /dev/snd/timer
gst-launc 1071 root   11u   CHR 116,24      0t0 1647 /dev/snd/pcmC0D0c
x6100_ui_ 1321 root  mem    CHR 116,24          1647 /dev/snd/pcmC0D0c
x6100_ui_ 1321 root  mem    CHR 116,16          1646 /dev/snd/pcmC0D0p
x6100_ui_ 1321 root   16r   CHR 116,33      0t0 1643 /dev/snd/timer
x6100_ui_ 1321 root   17u   CHR 116,16      0t0 1646 /dev/snd/pcmC0D0p
x6100_ui_ 1321 root   18r   CHR 116,33      0t0 1643 /dev/snd/timer
x6100_ui_ 1321 root   19u   CHR 116,24      0t0 1647 /dev/snd/pcmC0D0c
root@x6100:~#





root@x6100:~# fuser -v /dev/snd/*
                     USER        PID ACCESS COMMAND
/dev/snd/pcmC0D0c:   root       1070 F...m gst-launch-1.0
                     root       1071 F...m gst-launch-1.0
                     root       1321 F...m x6100_ui_v100
/dev/snd/pcmC0D0p:   root       1321 F...m x6100_ui_v100
/dev/snd/timer:      root       1070 f.... gst-launch-1.0
                     root       1071 f.... gst-launch-1.0
                     root       1321 f.... x6100_ui_v100
root@x6100:~#



# If your Linux installation is using PulseAudio, then it is possible to List all processes which are connected to your pulse audio
 pactl list clients
 
# catch the process making sound then run this command:
watch -n0.5 'pacmd list-sink-inputs | tee -a sound-inputs.log'


##  test microphone
# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 2: ALC662 rev3 Alt Analog [ALC662 rev3 Alt Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Q9000 [QuickCam Pro 9000], device 0: USB Audio [USB Audio]   ######  catch from this device
  Subdevices: 1/1
  Subdevice #0: subdevice #0
  
  

 arecord -f S16_LE -d 10 -r 16000 --device="hw:1,0" /tmp/test-mic.wav


###  inspecting attached USB devices on X6100 booted with Armbian  ###  


#  lsusb with "loopback" cable plugged
root@x6100:~# lsusb  |egrep -v "Real|root"
Bus 001 Device 007: ID 1a86:55d2 QinHeng Electronics USB Dual_Serial
Bus 001 Device 006: ID 0d8c:0012 C-Media Electronics, Inc. USB Audio Device
Bus 001 Device 005: ID 05e3:0608 Genesys Logic, Inc. Hub
root@x6100:~#



root@x6100:~# ./identify_usb.sh
/dev/ttyACM1 - 1a86_USB_Dual_Serial_529B010193
/dev/ttyACM0 - 1a86_USB_Dual_Serial_529B010193
/dev/snd/controlC1 - C-Media_Electronics_Inc._USB_Audio_Device
/dev/input/event5 - C-Media_Electronics_Inc._USB_Audio_Device
root@x6100:~#


# "pactl list"  shows no difference plugged/unplugged cable

#  aplay -L output shows difference with and without USBC cable plugged as loop allowing us to identify what are USB serial and audio devices coming from x6100 "base"

root@x6100:~# diff  unplugged.txt  plugged.txt
41a42,80
> hw:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     Direct hardware device without any conversions
> plughw:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     Hardware device with all software conversions
> sysdefault:CARD=Device
>     USB Audio Device, USB Audio
>     Default Audio Device
> front:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     Front output / input
> surround21:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     2.1 Surround output to Front and Subwoofer speakers
> surround40:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     4.0 Surround output to Front and Rear speakers
> surround41:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     4.1 Surround output to Front, Rear and Subwoofer speakers
> surround50:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     5.0 Surround output to Front, Center and Rear speakers
> surround51:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
> surround71:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
> iec958:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     IEC958 (S/PDIF) Digital Audio Output
> dmix:CARD=Device,DEV=0
>     USB Audio Device, USB Audio
>     Direct sample mixing device
> usbstream:CARD=Device
>     USB Audio Device
>     USB Stream Output
root@x6100:~#







without cable:
root@x6100:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sun8ia33audio [sun8i-a33-audio], device 0: 1c22c00.dai-sun8i sun8i-0 [1c22c00.dai-sun8i sun8i-0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

root@x6100:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: sun8ia33audio [sun8i-a33-audio], device 0: 1c22c00.dai-sun8i sun8i-0 [1c22c00.dai-sun8i sun8i-0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
root@x6100:~#



with cable:
root@x6100:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sun8ia33audio [sun8i-a33-audio], device 0: 1c22c00.dai-sun8i sun8i-0 [1c22c00.dai-sun8i sun8i-0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]   ## plugged cable ###
  Subdevices: 1/1
  Subdevice #0: subdevice #0
  
root@x6100:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: sun8ia33audio [sun8i-a33-audio], device 0: 1c22c00.dai-sun8i sun8i-0 [1c22c00.dai-sun8i sun8i-0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]   ## plugged cable ###
  Subdevices: 1/1
  Subdevice #0: subdevice #0
root@x6100:~#






#!/bin/bash

for sysdevpath in $(find /sys/bus/usb/devices/usb*/ -name dev); do
    (
        syspath="${sysdevpath%/dev}"
        devname="$(udevadm info -q name -p $syspath)"
        [[ "$devname" == "bus/"* ]] && exit
        eval "$(udevadm info -q property --export -p $syspath)"
        [[ -z "$ID_SERIAL" ]] && exit
        echo "/dev/$devname - $ID_SERIAL"
    )
done




root@x6100:~# usb-devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 1
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev=05.08
S:  Manufacturer=Linux 5.8.9 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=1c1a000.usb
C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=480 MxCh= 4
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=05e3 ProdID=0608 Rev=85.36
S:  Product=USB2.0 Hub
C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=256ms

T:  Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0d8c ProdID=0012 Rev=01.00
S:  Manufacturer=C-Media Electronics Inc.
S:  Product=USB Audio Device
C:  #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:  If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=87(I) Atr=03(Int.) MxPS=   4 Ivl=2ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 1
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev=05.08
S:  Manufacturer=Linux 5.8.9 ohci_hcd
S:  Product=Generic Platform OHCI controller
S:  SerialNumber=1c1a400.usb
C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 1
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev=05.08
S:  Manufacturer=Linux 5.8.9 musb-hcd
S:  Product=MUSB HDRC host driver
S:  SerialNumber=musb-hdrc.2.auto
C:  #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=480 MxCh= 0
D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0bda ProdID=b720 Rev=02.00
S:  Manufacturer=Realtek
S:  Product=802.11n WLAN Adapter
S:  SerialNumber=00e04c000001
C:  #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:  If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 2 Alt= 0 #EPs= 6 Cls=ff(vend.) Sub=ff Prot=ff Driver=rtl8xxxu
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=08(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=09(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=87(I) Atr=03(Int.) MxPS=  64 Ivl=500us
root@x6100:~#