Update VTx.md

Added info for TBS SA.

docs/VTx.md

@@ -3,6 +3,15 @@
 ### IRC Tramp
 
 #### Matek 1G3SE Setup
+
 To use the Matek 1G3SE with IRC Tramp. You will need to enter the CLI command `set vtx_frequency_group = FREQUENCYGROUP_1G3`. You must also make sure that the initial VTx settings in the configuration tab are in a valid range. They are: 
 - `vtx_band` 1 or 2
 - `vtx_channel` between 1 and 9
+
+### Team BlackSheep SmartAudio
+
+If you have problems getting SmartAudio working. There are a couple of CLI parameters you can try changing to see if they help.
+
+There is a workaround for early AKK VTx modules. This is enabled by default. You could try disabling this setting [`vtx_smartaudio_early_akk_workaround`](https://github.com/iNavFlight/inav/blob/master/docs/Settings.md#vtx_smartaudio_early_akk_workaround) to OFF.
+
+If you are using softserial, you can try using the alternate method by setting [`vtx_smartaudio_alternate_softserial_method`](https://github.com/iNavFlight/inav/blob/master/docs/Settings.md#vtx_smartaudio_alternate_softserial_method) to OFF.