pactl list | grep -A2 'Source'
Monitor Source: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
Latency: 0 usec, configured 0 usec
Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY
--
Source #1
State: SUSPENDED
Name: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
--
Source #2
State: SUSPENDED
Name: alsa_input.pci-0000_00_1b.0.analog-stereo
----------------------------
pactl list | grep 'Source'
Monitor Source: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
Monitor Source: bluez_sink.41_42_FF_28_DF_E0.a2dp_sink.monitor
Source #0
Source #100