<div dir="ltr">Hi, in my research I want to use an signal analyser program called "mataa", an extension of Octave. The extension works with the default audio device. I have an usb audio interface called scarlett 8i6. With the help of the members of the "alsa-user" list (especially Daniel Mack, in cc:), we resolved some problems of Ubuntu on the device configurations. Now, the usb device is listed as the following log shows: /proc/asound/cards 0 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xf7e00000 irq 45 1 [USB ]: USB-Audio - Scarlett 8i6 USB Focusrite Scarlett 8i6 USB at usb-0000:00:1d.0-1.2, high speed The problem is that the usb device is not showed in Ubuntu's audio pane, so I can't make it the default device. Typing F6 in alsamixer, scarlett is listed as well, but I can't controll it or make it the default device. I think that here is an importante information: the command "aplay -Dplughw:USB some-test-wave.wav" returns me sound from the device output. In time: the internal Intel sound is working perfectly. I tried change the default device using the terminal with the command "pacmd set-default-source SOURCENAME", but I can't find my usb device on the list of sinks or sources. I put in the end of this message the log of list-sinks and list-sources. Anybody can help me? pacmd list-sinks Welcome to PulseAudio! Use "help" for usage information. >>> 1 sink(s) available. * index: 0 name: <alsa_output.pci-0000_00_1b.0.analog-stereo> driver: <module-alsa-card.c> flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: SUSPENDED suspend cause: IDLE priority: 9959 volume: 0: 2% 1: 2% 0: -98.46 dB 1: -98.46 dB balance 0.00 base volume: 100% 0.00 dB volume steps: 65537 muted: no current latency: 0.00 ms max request: 0 KiB max rewind: 0 KiB monitor source: 0 sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 0 linked by: 0 configured latency: 0.00 ms; range is 0.50 .. 371.52 ms card: 0 <alsa_card.pci-0000_00_1b.0> module: 4 properties: alsa.resolution_bits = "16" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" <a href="http://alsa.name">alsa.name</a> = "92HD87B1/3 Analog" <a href="http://alsa.id">alsa.id</a> = "92HD87B1/3 Analog" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "0" alsa.card = "0" alsa.card_name = "HDA Intel PCH" alsa.long_card_name = "HDA Intel PCH at 0xf7e00000 irq 45" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:00:1b.0" sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0" device.bus = "pci" <a href="http://device.vendor.id">device.vendor.id</a> = "8086" <a href="http://device.vendor.name">device.vendor.name</a> = "Intel Corporation" <a href="http://device.product.name">device.product.name</a> = "6 Series/C200 Series Chipset Family High Definition Audio Controller" device.form_factor = "internal" device.string = "front:0" device.buffering.buffer_size = "65536" device.buffering.fragment_size = "32768" device.access_mode = "mmap+timer" <a href="http://device.profile.name">device.profile.name</a> = "analog-stereo" device.profile.description = "Analog Stereo" device.description = "Built-in Audio Analog Stereo" alsa.mixer_name = "Intel CougarPoint HDMI" alsa.components = "HDA:111d76d1,10280502,00100205 HDA:80862805,80860101,00100000" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" ports: analog-output-speaker: Speakers (priority 10000, available: unknown) properties: analog-output-headphones: Headphones (priority 9000, available: no) properties: active port: <analog-output-speaker> pacmd list-sources Welcome to PulseAudio! Use "help" for usage information. >>> 2 source(s) available. index: 0 name: <alsa_output.pci-0000_00_1b.0.analog-stereo.monitor> driver: <module-alsa-card.c> flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: IDLE suspend cause: priority: 1950 volume: 0: 100% 1: 100% 0: 0.00 dB 1: 0.00 dB balance 0.00 base volume: 100% 0.00 dB volume steps: 65537 muted: no current latency: 0.00 ms max rewind: 64 KiB sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 0 linked by: 0 configured latency: 371.52 ms; range is 0.50 .. 371.52 ms monitor_of: 0 card: 0 <alsa_card.pci-0000_00_1b.0> module: 4 properties: device.description = "Monitor of Built-in Audio Analog Stereo" device.class = "monitor" alsa.card = "0" alsa.card_name = "HDA Intel PCH" alsa.long_card_name = "HDA Intel PCH at 0xf7e00000 irq 45" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:00:1b.0" sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0" device.bus = "pci" <a href="http://device.vendor.id">device.vendor.id</a> = "8086" <a href="http://device.vendor.name">device.vendor.name</a> = "Intel Corporation" <a href="http://device.product.name">device.product.name</a> = "6 Series/C200 Series Chipset Family High Definition Audio Controller" device.form_factor = "internal" device.string = "0" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" * index: 1 name: <alsa_input.pci-0000_00_1b.0.analog-stereo> driver: <module-alsa-card.c> flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY state: SUSPENDED suspend cause: IDLE priority: 9959 volume: 0: 13% 1: 13% 0: -52.50 dB 1: -52.50 dB balance 0.00 base volume: 13% -52.50 dB volume steps: 65537 muted: no current latency: 0.00 ms max rewind: 0 KiB sample spec: s16le 2ch 44100Hz channel map: front-left,front-right Stereo used by: 0 linked by: 0 configured latency: 0.00 ms; range is 0.50 .. 371.52 ms card: 0 <alsa_card.pci-0000_00_1b.0> module: 4 properties: alsa.resolution_bits = "16" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" <a href="http://alsa.name">alsa.name</a> = "92HD87B1/3 Analog" <a href="http://alsa.id">alsa.id</a> = "92HD87B1/3 Analog" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "0" alsa.card = "0" alsa.card_name = "HDA Intel PCH" alsa.long_card_name = "HDA Intel PCH at 0xf7e00000 irq 45" alsa.driver_name = "snd_hda_intel" device.bus_path = "pci-0000:00:1b.0" sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0" device.bus = "pci" <a href="http://device.vendor.id">device.vendor.id</a> = "8086" <a href="http://device.vendor.name">device.vendor.name</a> = "Intel Corporation" <a href="http://device.product.name">device.product.name</a> = "6 Series/C200 Series Chipset Family High Definition Audio Controller" device.form_factor = "internal" device.string = "front:0" device.buffering.buffer_size = "65536" device.buffering.fragment_size = "32768" device.access_mode = "mmap+timer" <a href="http://device.profile.name">device.profile.name</a> = "analog-stereo" device.profile.description = "Analog Stereo" device.description = "Built-in Audio Analog Stereo" alsa.mixer_name = "Intel CougarPoint HDMI" alsa.components = "HDA:111d76d1,10280502,00100205 HDA:80862805,80860101,00100000" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" ports: analog-input-microphone-internal: Internal Microphone (priority 8900, available: unknown) properties: analog-input-microphone: Microphone (priority 8700, available: no) properties: active port: <analog-input-microphone-internal> </div>