pactl list sources

Source #0
	State: IDLE
	Name: alsa_output.usb-SEEED_ReSpeaker_4_Mic_Array__UAC1.0_-00.analog-stereo.monitor
	Description: Monitor of ReSpeaker 4 Mic Array (UAC1.0) Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s24le 2ch 48000Hz
	Channel Map: front-left,front-right
	Owner Module: 5
	Mute: no
	Volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor of Sink: alsa_output.usb-SEEED_ReSpeaker_4_Mic_Array__UAC1.0_-00.analog-stereo
	Latency: 0 usec, configured 100000 usec
	Flags: DECIBEL_VOLUME LATENCY
	Properties:
		device.description = "Monitor of ReSpeaker 4 Mic Array (UAC1.0) Analog Stereo"
		device.class = "monitor"
		alsa.card = "1"
		alsa.card_name = "ReSpeaker 4 Mic Array (UAC1.0)"
		alsa.long_card_name = "SEEED ReSpeaker 4 Mic Array (UAC1.0) at usb-0000:01:00.0-1.4, full speed"
		alsa.driver_name = "snd_usb_audio"
		device.bus_path = "platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0"
		sysfs.path = "/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/sound/card1"
		udev.id = "usb-SEEED_ReSpeaker_4_Mic_Array__UAC1.0_-00"
		device.bus = "usb"
		device.vendor.id = "2886"
		device.vendor.name = "SEEED"
		device.product.id = "0018"
		device.product.name = "ReSpeaker 4 Mic Array (UAC1.0)"
		device.serial = "SEEED_ReSpeaker_4_Mic_Array__UAC1.0_"
		device.form_factor = "speaker"
		device.string = "1"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-speakers-usb"
	Formats:
		pcm

Source #1
	State: RUNNING
	Name: alsa_input.usb-SEEED_ReSpeaker_4_Mic_Array__UAC1.0_-00.analog-mono
	Description: ReSpeaker 4 Mic Array (UAC1.0) Analog Mono
	Driver: module-alsa-card.c
	Sample Specification: s16le 1ch 48000Hz
	Channel Map: mono
	Owner Module: 5
	Mute: no
	Volume: mono: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor of Sink: n/a
	Latency: 894 usec, configured 100000 usec
	Flags: HARDWARE DECIBEL_VOLUME LATENCY
	Properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "USB Audio"
		alsa.id = "USB Audio"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "1"
		alsa.card_name = "ReSpeaker 4 Mic Array (UAC1.0)"
		alsa.long_card_name = "SEEED ReSpeaker 4 Mic Array (UAC1.0) at usb-0000:01:00.0-1.4, full speed"
		alsa.driver_name = "snd_usb_audio"
		device.bus_path = "platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.4:1.0"
		sysfs.path = "/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.4/1-1.4:1.0/sound/card1"
		udev.id = "usb-SEEED_ReSpeaker_4_Mic_Array__UAC1.0_-00"
		device.bus = "usb"
		device.vendor.id = "2886"
		device.vendor.name = "SEEED"
		device.product.id = "0018"
		device.product.name = "ReSpeaker 4 Mic Array (UAC1.0)"
		device.serial = "SEEED_ReSpeaker_4_Mic_Array__UAC1.0_"
		device.form_factor = "speaker"
		device.string = "hw:1"
		device.buffering.buffer_size = "9600"
		device.buffering.fragment_size = "2400"
		device.access_mode = "mmap"
		device.profile.name = "analog-mono"
		device.profile.description = "Analog Mono"
		device.description = "ReSpeaker 4 Mic Array (UAC1.0) Analog Mono"
		alsa.mixer_name = "USB Mixer"
		alsa.components = "USB2886:0018"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-speakers-usb"
	Ports:
		analog-input: Analog Input (priority: 10000)
	Active Port: analog-input
	Formats:
		pcm

Source #2
	State: IDLE
	Name: alsa_output.platform-bcm2835_audio.analog-mono.monitor
	Description: Monitor of Built-in Audio Analog Mono
	Driver: module-alsa-card.c
	Sample Specification: s16le 1ch 48000Hz
	Channel Map: mono
	Owner Module: 6
	Mute: no
	Volume: mono: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor of Sink: alsa_output.platform-bcm2835_audio.analog-mono
	Latency: 0 usec, configured 100000 usec
	Flags: DECIBEL_VOLUME LATENCY
	Properties:
		device.description = "Monitor of Built-in Audio Analog Mono"
		device.class = "monitor"
		alsa.card = "0"
		alsa.card_name = "bcm2835 Headphones"
		alsa.long_card_name = "bcm2835 Headphones"
		alsa.driver_name = "snd_bcm2835"
		device.bus_path = "platform-bcm2835_audio"
		sysfs.path = "/devices/platform/soc/fe00b840.mailbox/bcm2835_audio/sound/card0"
		device.form_factor = "internal"
		device.string = "0"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Formats:
		pcm

Source #3
	State: IDLE
	Name: MycroftOS_ALL.monitor
	Description: Monitor Source of Simultaneous output to ReSpeaker 4 Mic Array (UAC1.0) Analog Stereo, Built-in Audio Analog Mono
	Driver: module-combine-sink.c
	Sample Specification: s24le 4ch 48000Hz
	Channel Map: front-left,front-center,front-right,rear-center
	Owner Module: 19
	Mute: no
	Volume: front-left: 65536 / 100% / 0.00 dB,   front-center: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB,   rear-center: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor of Sink: MycroftOS_ALL
	Latency: 0 usec, configured 100000 usec
	Flags: DECIBEL_VOLUME LATENCY
	Properties:
		device.description = "Monitor Source of Simultaneous output to ReSpeaker 4 Mic Array (UAC1.0) Analog Stereo, Built-in Audio Analog Mono"
		device.class = "monitor"
		device.icon_name = "audio-input-microphone"
	Formats:
		pcm