Hi, Own a denon dn-x1700 (dj mixer) which includes an usb soundcard. I'm running ubuntu 18.04 with kernel 5.6 low latency loaded. Upon connecting the soundcard it is visible in alsa, however I'm unable to select it in other programs e.g. audacity, jack, mixxx. Also not able to use aplay to get sound. Below you will see in dmesg "[ 5946.023816] usb 3-1: parse_audio_format_rates_v2v3(): unable to find clock source (clock -32)" - which I believe is a known issue for Denon products. A quirk has been included in kernel 5.6. I'm not sure if this issue is the same and how to proceed. Any help would be appreciated! cat /etc/os-release NAME="Ubuntu" VERSION="18.04.4 LTS (Bionic Beaver)" -- cat /proc/asound/version Advanced Linux Sound Architecture Driver Version k5.6.0-050600-lowlatency -- lsusb Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 003: ID 154e:500a D&M Holdings, Inc. (Denon/Marantz) Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 004: ID 1bcf:2883 Sunplus Innovation Technology Inc. Bus 001 Device 005: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub -- aplay -L default Playback/recording through the PulseAudio sound server null Discard all samples (playback) or generate zero samples (capture) pulse PulseAudio Sound Server sysdefault:CARD=PCH HDA Intel PCH, ALC663 Analog Default Audio Device front:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog Front speakers surround21:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog 4.0 Surround output to Front and Rear speakers surround41:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Digital IEC958 (S/PDIF) Digital Audio Output dmix:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog Direct sample mixing device dmix:CARD=PCH,DEV=1 HDA Intel PCH, ALC663 Digital Direct sample mixing device dsnoop:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog Direct sample snooping device dsnoop:CARD=PCH,DEV=1 HDA Intel PCH, ALC663 Digital Direct sample snooping device hw:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog Direct hardware device without any conversions hw:CARD=PCH,DEV=1 HDA Intel PCH, ALC663 Digital Direct hardware device without any conversions plughw:CARD=PCH,DEV=0 HDA Intel PCH, ALC663 Analog Hardware device with all software conversions plughw:CARD=PCH,DEV=1 HDA Intel PCH, ALC663 Digital Hardware device with all software conversions hdmi:CARD=NVidia,DEV=0 HDA NVidia, HDMI 0 HDMI Audio Output hdmi:CARD=NVidia,DEV=1 HDA NVidia, HDMI 0 HDMI Audio Output hdmi:CARD=NVidia,DEV=2 HDA NVidia, HDMI 0 HDMI Audio Output hdmi:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 HDMI Audio Output dmix:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct sample mixing device dmix:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Direct sample mixing device dmix:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Direct sample mixing device dmix:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Direct sample mixing device dsnoop:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct sample snooping device dsnoop:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Direct sample snooping device dsnoop:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Direct sample snooping device dsnoop:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Direct sample snooping device hw:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Direct hardware device without any conversions hw:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Direct hardware device without any conversions hw:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Direct hardware device without any conversions hw:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Direct hardware device without any conversions plughw:CARD=NVidia,DEV=3 HDA NVidia, HDMI 0 Hardware device with all software conversions plughw:CARD=NVidia,DEV=7 HDA NVidia, HDMI 0 Hardware device with all software conversions plughw:CARD=NVidia,DEV=8 HDA NVidia, HDMI 0 Hardware device with all software conversions plughw:CARD=NVidia,DEV=9 HDA NVidia, HDMI 0 Hardware device with all software conversions sysdefault:CARD=DNX1700 DN-X1700, USB Audio Default Audio Device front:CARD=DNX1700,DEV=0 DN-X1700, USB Audio Front speakers surround21:CARD=DNX1700,DEV=0 DN-X1700, USB Audio 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=DNX1700,DEV=0 DN-X1700, USB Audio 4.0 Surround output to Front and Rear speakers surround41:CARD=DNX1700,DEV=0 DN-X1700, USB Audio 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=DNX1700,DEV=0 DN-X1700, USB Audio 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=DNX1700,DEV=0 DN-X1700, USB Audio 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=DNX1700,DEV=0 DN-X1700, USB Audio 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=DNX1700,DEV=0 DN-X1700, USB Audio IEC958 (S/PDIF) Digital Audio Output dmix:CARD=DNX1700,DEV=0 DN-X1700, USB Audio Direct sample mixing device dsnoop:CARD=DNX1700,DEV=0 DN-X1700, USB Audio Direct sample snooping device hw:CARD=DNX1700,DEV=0 DN-X1700, USB Audio Direct hardware device without any conversions plughw:CARD=DNX1700,DEV=0 DN-X1700, USB Audio Hardware device with all software conversions -- aplay -D plughw:CARD=DNX1700,DEV=0 piano2.wav Playing WAVE 'piano2.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo ALSA lib pcm_params.c:2162:(snd1_pcm_hw_refine_slave) Slave PCM not usable aplay: set_params:1270: Broken configuration for this PCM: no configurations available --- alsamixer (load the DN-X1700 sound card) cannot load mixer controls: Broken pipe --- lsusb -vd 154e:500a Bus 003 Device 004: ID 154e:500a D&M Holdings, Inc. (Denon/Marantz) Couldn't open device, some information will be missing Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 239 Miscellaneous Device bDeviceSubClass 2 ? bDeviceProtocol 1 Interface Association bMaxPacketSize0 64 idVendor 0x154e D&M Holdings, Inc. (Denon/Marantz) idProduct 0x500a bcdDevice 0.01 iManufacturer 1 iProduct 2 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 385 bNumInterfaces 6 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xc0 Self Powered MaxPower 0mA Interface Association: bLength 8 bDescriptorType 11 bFirstInterface 0 bInterfaceCount 3 bFunctionClass 1 Audio bFunctionSubClass 0 bFunctionProtocol 32 iFunction 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 32 iInterface 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 2.00 bCategory 0 wTotalLength 92 bmControl 0x01 Latency control Control (read-only) AudioControl Interface Descriptor: bLength 17 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 1 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bCSourceID 7 bNrChannels 8 bmChannelConfig 0x000000ff Front Left (FL) Front Right (FR) Front Center (FC) Low Frequency Effects (LFE) Back Left (BL) Back Right (BR) Front Left of Center (FLC) Front Right of Center (FRC) bmControls 0x0555 Copy Protect Control (read-only) Connector Control (read-only) Overload Control (read-only) Cluster Control (read-only) Underflow Control (read-only) Overflow Control (read-only) iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 2 wTerminalType 0x0301 Speaker bAssocTerminal 0 bSourceID 1 bCSourceID 7 bmControls 0x0155 Copy Protect Control (read-only) Connector Control (read-only) Overload Control (read-only) Underflow Control (read-only) Overflow Control (read-only) iTerminal 0 AudioControl Interface Descriptor: bLength 17 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 3 wTerminalType 0x0201 Microphone bAssocTerminal 0 bCSourceID 7 bNrChannels 8 bmChannelConfig 0x000000ff Front Left (FL) Front Right (FR) Front Center (FC) Low Frequency Effects (LFE) Back Left (BL) Back Right (BR) Front Left of Center (FLC) Front Right of Center (FRC) bmControls 0x0555 Copy Protect Control (read-only) Connector Control (read-only) Overload Control (read-only) Cluster Control (read-only) Underflow Control (read-only) Overflow Control (read-only) iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 4 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bSourceID 3 bCSourceID 7 bmControls 0x0155 Copy Protect Control (read-only) Connector Control (read-only) Overload Control (read-only) Underflow Control (read-only) Overflow Control (read-only) iTerminal 0 AudioControl Interface Descriptor: bLength 8 bDescriptorType 36 bDescriptorSubtype 10 (CLOCK_SOURCE) bClockID 5 bmAttributes 0x02 Internal variable Clock bmControls 0x03 Clock Frequency Control (read/write) bAssocTerminal 0 iClockSource 0 AudioControl Interface Descriptor: bLength 8 bDescriptorType 36 bDescriptorSubtype 10 (CLOCK_SOURCE) bClockID 6 bmAttributes 0x02 Internal variable Clock bmControls 0x03 Clock Frequency Control (read/write) bAssocTerminal 0 iClockSource 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 11 (CLOCK_SELECTOR) bUnitID 7 bNrInPins 2 baCSourceID( 0) 5 baCSourceID( 1) 6 bmControls 0x01 Clock Selector Control (read-only) iClockSelector 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 32 iInterface 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 32 iInterface 0 AudioStreaming Interface Descriptor: bLength 16 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 1 bmControls 0x05 Active Alternate Setting Control (read-only) Valid Alternate Setting Control (read-only) bFormatType 1 bmFormats 0x00000001 PCM bNrChannels 8 bmChannelConfig 0x000000ff Front Left (FL) Front Right (FR) Front Center (FC) Low Frequency Effects (LFE) Back Left (BL) Back Right (BR) Front Left of Center (FLC) Front Right of Center (FRC) iChannelNames 0 AudioStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bSubslotSize 3 bBitResolution 24 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 13 Transfer Type Isochronous Synch Type Synchronous Usage Type Data wMaxPacketSize 0x0138 1x 312 bytes bInterval 1 AudioControl Endpoint Descriptor: bLength 8 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x00 bmControls 0x15 Pitch Control (read-only) Data Overrun Control (read-only) Data Underrun Control (read-only) bLockDelayUnits 1 Milliseconds wLockDelay 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 32 iInterface 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 32 iInterface 0 AudioStreaming Interface Descriptor: bLength 16 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 4 bmControls 0x05 Active Alternate Setting Control (read-only) Valid Alternate Setting Control (read-only) bFormatType 1 bmFormats 0x00000001 PCM bNrChannels 8 bmChannelConfig 0x000000ff Front Left (FL) Front Right (FR) Front Center (FC) Low Frequency Effects (LFE) Back Left (BL) Back Right (BR) Front Left of Center (FLC) Front Right of Center (FRC) iChannelNames 0 AudioStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bSubslotSize 3 bBitResolution 24 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x85 EP 5 IN bmAttributes 13 Transfer Type Isochronous Synch Type Synchronous Usage Type Data wMaxPacketSize 0x0138 1x 312 bytes bInterval 1 AudioControl Endpoint Descriptor: bLength 8 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x00 bmControls 0x15 Pitch Control (read-only) Data Overrun Control (read-only) Data Underrun Control (read-only) bLockDelayUnits 1 Milliseconds wLockDelay 0 Interface Association: bLength 8 bDescriptorType 11 bFirstInterface 3 bInterfaceCount 2 bFunctionClass 1 Audio bFunctionSubClass 0 bFunctionProtocol 0 iFunction 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 9 bInCollection 1 baInterfaceNr( 0) 4 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 4 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 1 Audio bInterfaceSubClass 3 MIDI Streaming bInterfaceProtocol 0 iInterface 0 MIDIStreaming Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 97 MIDIStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (MIDI_IN_JACK) bJackType 1 Embedded bJackID 1 iJack 0 MIDIStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (MIDI_IN_JACK) bJackType 1 Embedded bJackID 17 iJack 0 MIDIStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (MIDI_IN_JACK) bJackType 2 External bJackID 2 iJack 0 MIDIStreaming Interface Descriptor: bLength 6 bDescriptorType 36 bDescriptorSubtype 2 (MIDI_IN_JACK) bJackType 2 External bJackID 18 iJack 0 MIDIStreaming Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (MIDI_OUT_JACK) bJackType 1 Embedded bJackID 3 bNrInputPins 1 baSourceID( 0) 2 BaSourcePin( 0) 1 iJack 0 MIDIStreaming Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (MIDI_OUT_JACK) bJackType 1 Embedded bJackID 19 bNrInputPins 1 baSourceID( 0) 18 BaSourcePin( 0) 1 iJack 0 MIDIStreaming Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (MIDI_OUT_JACK) bJackType 2 External bJackID 4 bNrInputPins 1 baSourceID( 0) 1 BaSourcePin( 0) 1 iJack 0 MIDIStreaming Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (MIDI_OUT_JACK) bJackType 2 External bJackID 20 bNrInputPins 1 baSourceID( 0) 17 BaSourcePin( 0) 1 iJack 0 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 bRefresh 0 bSynchAddress 0 MIDIStreaming Endpoint Descriptor: bLength 6 bDescriptorType 37 bDescriptorSubtype 1 (GENERAL) bNumEmbMIDIJack 2 baAssocJackID( 0) 1 baAssocJackID( 1) 17 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 0 bRefresh 0 bSynchAddress 0 MIDIStreaming Endpoint Descriptor: bLength 6 bDescriptorType 37 bDescriptorSubtype 1 (GENERAL) bNumEmbMIDIJack 2 baAssocJackID( 0) 3 baAssocJackID( 1) 19 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 5 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 3 Human Interface Device bInterfaceSubClass 0 No Subclass bInterfaceProtocol 0 None iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.11 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 34 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 1 --- lsusb -t /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M |__ Port 1: Dev 6, If 0, Class=Audio, Driver=snd-usb-audio, 480M |__ Port 1: Dev 6, If 1, Class=Audio, Driver=snd-usb-audio, 480M |__ Port 1: Dev 6, If 2, Class=Audio, Driver=snd-usb-audio, 480M |__ Port 1: Dev 6, If 3, Class=Audio, Driver=snd-usb-audio, 480M |__ Port 1: Dev 6, If 4, Class=Audio, Driver=snd-usb-audio, 480M |__ Port 1: Dev 6, If 5, Class=Human Interface Device, Driver=usbhid, 480M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M |__ Port 1: Dev 9, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 1: Dev 9, If 1, Class=Wireless, Driver=btusb, 12M |__ Port 2: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M |__ Port 2: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M --- dmesg [ 5945.998541] usb 3-1: new high-speed USB device number 4 using xhci_hcd [ 5946.014142] usb 3-1: config 1 interface 4 altsetting 0 bulk endpoint 0x3 has invalid maxpacket 64 [ 5946.014150] usb 3-1: config 1 interface 4 altsetting 0 bulk endpoint 0x82 has invalid maxpacket 64 [ 5946.014429] usb 3-1: New USB device found, idVendor=154e, idProduct=500a, bcdDevice= 0.01 [ 5946.014434] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 5946.014437] usb 3-1: Product: DN-X1700 [ 5946.014441] usb 3-1: Manufacturer: D&M-- [ 5946.020938] usb 3-1: parse_audio_format_rates_v2v3(): unable to find clock source (clock -32) [ 5946.022267] usb 3-1: 1:1: cannot set enable PITCH (v2) [ 5946.023816] usb 3-1: parse_audio_format_rates_v2v3(): unable to find clock source (clock -32) [ 5946.025235] usb 3-1: 2:1: cannot set enable PITCH (v2) [ 5946.028977] hid-generic 0003:154E:500A.0003: hiddev0,hidraw0: USB HID v1.11 Device [D&M-- DN-X1700] on usb-0000:04:00.0-1/input5 Thanks, Wouter _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user