pactl list sinks

Sink #0
State: SUSPENDED
Name: auto_null
Description: Dummy Output
Driver: module-null-sink.c
Sample Specification: s16le 2ch 44100Hz
Channel Map: front-left,front-right
Owner Module: 10
Mute: no
Volume: 0:  85% 1:  85%
        0: -4,19 dB 1: -4,19 dB
        balance 0,00
Base Volume: 100%
             0,00 dB
Monitor Source: auto_null.monitor
Latency: 0 usec, configured 0 usec
Flags: DECIBEL_VOLUME LATENCY
Properties:
    device.description = "Dummy Output"
    device.class = "abstract"
    device.icon_name = "audio-card"
Formats:
    pcm