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.

gsm

GSM digital audio format

Developed in Europe, this format was designed for mobile users. GSM is used for audio files that contain a large amount of audio information. Suitable for voice recordings, including recordings of phone calls. You can compress and archive a GSM file to achieve a different file size. The format is mostly used to create and store voice information. There are 4 types of this format that can be opened using different applications.