Digital radio communications are audio sounds that are digitized. There are a variety of modes that may occupy less bandwidth, or perhaps allow communications with very weak signals or very noisy conditions.
Digital Mode resources
JS8Call for digital QSOs.
At great YouTube video from KW3KW.
JS8Call from A-Z Covering the Basics to Advanced Settings In One Video
Digital presentation setups for Fldigi Flamp and Flmsg
FlampHelp
From a presentation by W4TWK
Some Digital Ham Radio Resources
Digital, the waves of the future are here today.
An Excellent list of Digital Modes Information from WB8NUT
Have you ever tried to distinguish various digital mode signals on a waterfall and
identify them when they are NOT PSK31. Here is some help.
More information on these modes:
Weak Signal Communication Software
WSJT, MP65, WSPR, and WSJT-X are open-source programs designed for weak-signal digital communication by amateur radio. Normal usage requires a standard SSB transceiver and a personal computer with sound card.
WSJT-X implements communication protocols or “modes” called FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR, as well as one called Echo for detecting and measuring your own radio signals reflected from the Moon. These modes were all designed for making reliable, confirmed QSOs under extreme weak-signal conditions.
Gateway Amateur Radio Club 