TrueTTY ham radio digital communications software Description:

Program for amateur radio digital communications via a sound card. Supported modes are RTTY (Baudot code), ASCII (7 or 8 bits), PSK31 (BPSK and QPSK) and
AMTOR-FEC (SITOR-B, NAVTEX).
SELFEC SITOR decoding is possible also. No additional hardware required - you need only transceiver and computer (5x86-133, Pentium-75 or better) with sound card. Optionally you can use simple circuit for PTT-control. It make fast and convenient frequence control, has a lot macros for tramsmitting. Can cooperate with RZ4AG AALog logger.