This format was created for online broadcasting. Opus is an audio codec for compression used on the Internet in real-time mode. Employed by programs such as Skype and Mozilla. Mostly used in interactive applications. The advantages of Opus are high audio quality and good compression. It works only on devices powered by Windows. Opus files can be converted to similar extensions.

dss

Digital Speech Standard

Developed by the International Voice Association, this is a standardized file format for digitized speech. Digital Speech Standard files store information in a high-compression format. You can record an insert or overwrite the sound; the file can also be filled with metadata. This format offers two modes: “Overwrite” and “Enable”. Digital Speech Standard allows for creating voice files suitable for sending via e-mail. This format is powered by IBM ViaVoice software, which enables speech recognition.