update aarch add virtual mic tut

tuts/arch_add_virtual_mic.md

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+# How to add a virtual mic
+
+## Add the virtual speaker
+
+`pactl load-module module-null-sink sink_name=VirtualSpeaker sink_properties=device.description="virtual speaker"`
+
+## Add the virtual mic
+
+this is a loopback deivce
+`pactl load-module module-remap-source master=VirtualSpeaker.monitor source_name=VirtualMic source_properties=device.description="virtual mic"`
+
+## Using in OBS
+
+### Add audio mixer mic
+
+In your audio mixer, you should have a `Mic/Aux`. If you dont, figure out how to add it.
+
+### Update the properties of Mic
+
+In your audio mixer, selec the menu button on your mic option. Then Select `Properties`.
+A window should pop up in which you will pick the device you use as a microphone. In my case its my `Fifine usb mic`
+
+### Update the advanced audio options
+
+Do the same as the previous step, except go to `Advanced Audio Options`. You will see `Mic/Aux`.
+You will also see a table header called `Audio Monitoring`. Go there, and change the dropdown from `Monitor Off` to `Monitor and Output`.
+
+Now close that dialog
+
+### Update OBS advanced audio settings
+
+On the right hand side of the default OBS view, you will see a fiew options:
+
+-   Start Streaming
+-   Start Recording
+-   Studio mode
+-   Settings
+-   Exit
+
+Choose `Settings`. A dialog will appear.
+Navigate to the `Audio` tab on the left hand side.
+Scroll down until you see a section called `Advanced`.
+
+Change the `Monitoring Device` option to be the new virtual device. Should be called `virtual`
+Click apply; close.
+
+### Fin
+
+Now you should be able to go into something like Discord and select your input device as the new virtual device.
+
+---
+
+## > [!NOTE]
+
+> If its still not working, open up `Volume Control` app and under the `Recording` nav tab, your `virtual input from` device should be set to `Monitor of virtual`.