This is an audio container that can be opened using various programs and applications provided by Sony. W64 is often used for audio editing, as it supports the free frequency of data, as well as channels and bit depths. W64 files come in the 64-bit resolution. They can also be opened using certain programs on Windows, macOS, and Linux.

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.