Hello flightgear developers,I created a patch for the Nasal script 'atc-chatter.nas' which makes ATC background chatter dependent on the airport id. Currently the airport id used is the one set in '/sim/presets/airport-id' (but should probably be '/sim/atc/freq-airport' - the problem is that this property never has a value when I run fgfs).
The patch works as follows: for every airport there can be a directory '$FG_ROOT/data/ATC/Chatter/$AIRPORT_ID' containing the specific chatter .wav files. This directory is queried for existence by the patch and - if it exists for the current preset airport - is used for background chatter playback. If there is no directory for the current airport id, the default background chatter is used ('UK'). The list of background chatter files is only updated if the airport id changes from one sample to another. The default background chatter is always loaded on init to save loading time because there currently are no airport specific chatter files. That leads me to another point: I am planning on creating several new chatter files for KSFO, as this is _the_ airport in fgfs. I have already save d some audio streams of live KSFO tower/ground/clearance ATC chatter to my hdd which only need to be chopped into pieces and added to fgfs.
Another thing I am planning to change in ATC background chatter handling is the differentiation between ground, tower, clearance chatter. Then there will be chatter depending on where your airplane currently is (ground, air,...).
I uploaded the patch (created with fg-submit) to http://www.ramforth.com/flightgear/Nasal.diff.bz2 and I hope that I am not the only one to find having more versatile background chatter a nice feature.
Regards, Tobias RamforthPS: I appreciate suggestions, comments, bug reports on this patch, very much!
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