Dave--whatever you've done in P2ATC V3 with radio and audio control is most definitely not working with XPlane 12.  P2ATC v2.7.0.2 was successfully communicating with the radios in XP12--in V3 no amount of manipulation of the acft audio control panel works with advanced add-ons like the Hotstart Challenger or FF 757/767.  I thought it might be an issue related to running P2ATC remotely, but last night I installed it on the same machine as XP and it still has the same showstopping issues.

It's not responding to radio freq changes using the freq menu at all.  I only occasionally get audio from ATIS, and then no audio from controllers etc.  I do hear the transmissions made by the speech generator, so it's not a device issue.  The radio/audio control is hopelessly broken, which renders the whole program unusable--I strongly urge you to revisit what you did right with radio/audio interfacing in V2 and bring that over so that XPlane 12 users running something more sophisticated than a default acft can use P2ATC.

I'm running 3.0.0.0 EA 0.0.30.n with XP 12.1.4 and XPUIPC 2.0.3.8

Bob,

This is a known issue related to the new ability in V3 to monitor the 2nd channel.

When you connect P2A, if the COM names in P2A are COM and COM instead of COM1 and COM2, then the radio is not connecting properly.

In most complex aircraft if you have the option of which channels you are listening to by turning a switch or Volume control on or off, you can turn both of these off before connecting and you should get a good connection to the SIM.  You'll also want to turn these off before swapping channels.  To monitor the 2nd Channel, you can turn on the Volume control for that Channel.  You should then be able to set the frequency on the active channel and use the radios.

 Update 0.0.30 has a new option to "Bypass Actft Com Channel Selection" on the Common tab of Settings.  Setting that option should let you swap active channels and do all the radio settings in the P2A interface, but the settings may not be transferred to the visual cockpit.

We will be working on this to get a better solution that will hopefully provide full COM radio functionality for most X-Plane aircraft.  

Dave

One other thing to try is to run P2A as Admin, if you're not already.  Or, if you are running as admin, try running as a regular user.  Some users have found that is solves some of the issues they were having with tuning the COM radios.

Dave