OnlineGSM to OPUS, you can put the GSM to OPUS format on your computer, tablet or mobile phone without downloading any software!
Upload GSM file
Select files from your computer, Google Drive, Dropbox, URL or by dragging them on the page.
Select output OPUS or any other format as the conversion result (click the Convert button)
Download your OPUS file
After the conversion you can download your OPUS file and upload it to Google Drive, Dropbox.
.gsm GSM 06.10 Lossy Speech Compression
GSM 06.10 Lossy Speech Compression. A lossy format for compressing speech which is used in the Global Standard for Mobile telecommunications (GSM). It’s good for its purpose, shrinking audio data size, but it will introduce lots of noise when a given audio signal is encoded and decoded multiple times. This format is used by some voice mail applications. It is rather CPU intensive., What is the GSM format?
.opus Sound coding format
Opus is a sound encoding format, and Opus's predecessor was the celt encoder. Developed by the IETF for real-time voice transmission over the network, the standard format is RFC 6716., What is the OPUS format?