Sound configure

From Acarsd

Sound configuration for your acarsd system

The sound configuration is the important part on the way to good decoding results. The standard sampling rate which is in use is: 19520Hz

Some very old or some new low quality third party driver are unable to handle these sampling rate and in some cases acarsd cannot be started (you'll see an errormessage). There are also drivers which send ok but the sampling rate was not changed. If you can hear the ACARS transmissions but after (1-2h you have still not results on your screen, you should check with a different sampling rate).

Until acarsd 1.65 there is a switch to disable streaming sound. Streaming sound means, that acarsd will start a thread which reads permanent from your soundcard. If this box is ticked, you have data loss.

This option will be removed from acarsd 1.66

If your soundcard (or driver) cannot handle 19520Hz, you can select 22kHz or 44kHz within the installer. Please note that we have the best results with the standard sampling rate of 19520Hz and a higher sampling rate needs more CPU power.

Under Linux all tested cards with the ALSA or OSS driver can handle 19520Hz

The devicename or devicenumber (under Windows) is important when you'll select which soundcard acarsd should use. Under Linux the default is /dev/dsp and under Windows the default is 0

To use more than one soundcard, enter the devicenames or devicenumbers separated by comma.

For example: /dev/dsp,/dev/dsp2 or under Windows: 0,1,2

Up to 8 airbandscanners on 4 soundcards

Within the soundsettings you can also enable the acarsd TwoInOne-Feature If this is enabled, you can have 2 airbandscanner on one soundcard (you'll need an Y-Adapater)

With this option, acarsd can handle up to 8 airband scanners on 4 soundcards.

All other settings in the sound dialog are only used to show on which channel was the decoded ACARS transmission. You can enter names or identifier for each card and channel.