The evolution of computer and technology has simplified the task in many fields thanks to more and more performing software. TrueTTY is a program specially designed for amateur radio digital broadcasting via a sound card. It supports the following modes: RTTY (Baudot code), ASCII (7 or 8 bits), PSK31 (BPSK and QPSK), BPSK63, QPSK63, BPSK125, AMTOR-FEC (SITOR-B, NAVTEX), MultiFSK-16, MultiFSK- 8. HF-PACKET and UHF-PACKET (AX25) are supported in KISS-TNC emulation mode. It still has lots of other features, but you only have to download it to discover them. However, radio system knowledge is required to use it.