I have never used avconv before. I've been reading the manual and asking questions on various forums and IRC for the last couple weeks but I have not found an answer yet. (This question is one part of a larger question I asked here. I am breaking it down because this key part is where I need help first. I may delete the other question because it may be too broad or ill-defined.)I used pacmd list-cards to list my streaming audio sources. Below are the two that I need to define as inputs to avconv.alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo.monitor/#2: Monitor of Scarlett 2i2 USB Analog Stereoalsa_input.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo/#3: Scarlett 2i2 USB Analog StereoSo my question is simply, How do I define those sources as inputs to avconv?More info/background follows:Once I know how to define the audio inputs I plan to use them similarly to this:#!/bin/bashOUTPUT=audio_`date +%Y-%m-%d_%H%M`avconv \-f alsa -ac 2 -i <alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo.monitor> \-f alsa -ac 1 -i <alsa_input.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo> \-map 0:0 -map 1:0 \-acodec flac \-threads 0 \-y $OUTPUTI assume I need to replace what is in angle brackets with the correct notation. And I have no idea if the rest of the above script is even close...Here's my hardware info:$ pacmd list-cards  Welcome to PulseAudio! Use help for usage information.  >>> 3 card(s) available.  [snip other cards]index: 2name: <alsa_card.usb-Focusrite_Scarlett_2i2_USB-00-USB>driver: <module-alsa-card.c>owner module: 6properties:        alsa.card = 1        alsa.card_name = Scarlett 2i2 USB        alsa.long_card_name = Focusrite Scarlett 2i2 USB at usb-0000:04:00.0-2, high speed        alsa.driver_name = snd_usb_audio        device.bus_path = pci-0000:04:00.0-usb-0:2:1.0        sysfs.path = /devices/pci0000:00/0000:00:1c.4/0000:04:00.0/usb3/3-2/3-2:1.0/sound/card1        udev.id = usb-Focusrite_Scarlett_2i2_USB-00-USB        device.bus = usb        device.vendor.id = 1235        device.vendor.name = Novation EMS        device.product.id = 8006        device.product.name = Scarlett 2i2 USB        device.serial = Focusrite_Scarlett_2i2_USB        device.string = 1        device.description = Scarlett 2i2 USB        module-udev-detect.discovered = 1        device.icon_name = audio-card-usbprofiles:        output:analog-stereo: Analog Stereo Output (priority 6000)        output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (priority 6060)        output:analog-stereo+input:iec958-stereo: Analog Stereo Output + Digital Stereo (IEC958) Input (priority 6055)        output:iec958-stereo: Digital Stereo (IEC958) Output (priority 5500)        output:iec958-stereo+input:analog-stereo: Digital Stereo (IEC958) Output + Analog Stereo Input (priority 5560)        output:iec958-stereo+input:iec958-stereo: Digital Stereo Duplex (IEC958) (priority 5555)        input:analog-stereo: Analog Stereo Input (priority 60)        input:iec958-stereo: Digital Stereo (IEC958) Input (priority 55)        off: Off (priority 0)active profile: <output:analog-stereo+input:analog-stereo>sinks:        alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo/#1: Scarlett 2i2 USB Analog Stereosources:        alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo.monitor/#2: Monitor of Scarlett 2i2 USB Analog Stereo        alsa_input.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo/#3: Scarlett 2i2 USB Analog Stereoports:        analog-output: Analog Output (priority 9900, available: unknown)                properties:        analog-input: Analog Input (priority 10000, available: unknown)                properties:        iec958-stereo-input: iec958-stereo-input (priority 0, available: unknown)                properties:        iec958-stereo-output: Digital Output (S/PDIF) (priority 0, available: unknown)                properties:
how to use avconv to record streaming audio (how to define sources)?
audio;avconv
You can also find out your interface's names withpactl list sources | grep Name:In your case it is alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo.monitor.Then record audio with avconv by using exactly that name after the -i switchavconv -f alsa -ac 2 -ar 48000 -f pulse \-i alsa_output.usb-Focusrite_Scarlett_2i2_USB-00-USB.analog-stereo.monitor \-acodec libvorbis -aq 6 test.oggIn essence ommit the greater-than and smaller-than signs around the identifiers in your example and it should work.Here is a tutorial about the usage and meaning of these commands: http://meshfields.de/linux-usb-audio-stream-recording/