Radio communications...

EasyATC is an interactive air traffic control tool: you need first to talk to the ATC to hear him talking to you. To talk to the ATC, you must request through keyboard inputs. But like in real life, if you request to the wrong frequency, no one will answer (if the frequency is not used in the area you fly) or the ATC will probably not be able to deliver the clearance you expect.
So you need to set your radio COMMs properly. At this stage, only the COMM1 is processed by EasyATC. COMM2 is for later improvements.

This is all you have to know about radio communications in EasyATC...

• Set frequencies on COMM1 only!
• In most of the planes (almost all planes, probably...) a switch is used to enable/disable the COMM1 sound. So make sure COMM1 is not muted
• You can set your COMM1 to any of the frequencies that are edited in the flight plan. Not necessary the one of the closer waypoint.
• When the waypoint of the frequency you talk to is too far, the ATC will not hear you (see VHF range for example). Note that in this case, the Debug text will indicate that you are too far from the given ATC.
• Once you have set your COMM1, you must request first in order to "awake" the ATC. When flying, the Transit in request is usually the more appropriate way to contact an ATC. If you are on ground, ready to start your flight, flight clearance, taxi clearance and take-off clearance are the ones you should use.
• Once you have talked at least once to the ATC, he can talk to you later on, even if you don't request anymore : he stays in contact with you!... until he leaves you...
• The ATC can close the communication in the following cases:
• You are close to the maximum theorical VHF range from the airport (or the closest waypoint) with the frequency you curently talk to
• You are approaching a waypoint with a different frequency (or no frequency edited in the flight plan) so the ATC clears you to change the frequency, and says goodbye
• The ATC is not authorised to deliver the clearance you ask for and he knows the frequency of the ATC you should contact. This case occurs when you have a Taxi chart in your flight plan and, for example, you ask for a flight clearance to the Ground control! The ATC will then say "you are not talking to the appropriate control. Contact Approach [or Departure] on nnn.nn" because APPROACH ATC is the one that is authorised to deliver flight clearances.
• Note that there is for sure some bugs if you "play" too much with your COMM1. For example, if you contact an ATC, and then change your COMM1 frequency a few seconds, when you set it back to the ATC frequency, you will need to awake him again by requesting...