Hi. Mr Charles Brain has come up with a nice soundcard app to decode ARINC (HF ACARS). http://www.ute-monitor.org/pchfdl101.zip Stated as "unsupported", it works on my PC/PCR1K .. and works fine! Have fun. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.324 / Virus Database: 181 - Release Date: 14/02/02