This SELCAL App is a tone encoder which codes SELCAL selective calling tones.
The tones are produced in real time in high quality audio (16 bit, 44.1 kHz) according to ICAO Annex 10 Volume II, ARINC Characteristic 714-6 Mark 3 and ASRI SELCAL specifications.
It can be of great use to test SELCAL decoders since you will always have it with you, unlike those expensive and few SELCAL text boxes which are never around when you need them...
