pactl command

[Jerry Geis]

I am trying to stop or mute and audio source from the command line

pactl list sources short
1 auto_null.monitor module-null-sink.c s16le 2ch 48000Hz IDLE
3 alsa_input.usb-046d_HD_Pro_Webcam_C920_393D52AF-02.iec958-stereo
module-alsa-card.c s16le 2ch 32000Hz RUNNING


pactl suspend-source auto_null.monitor 1
Failure: Invalid argument

 pactl suspend-source 1 1
Failure: Invalid argument

What am I doing wrong on this command ?
Thanks

Jerry
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