You can not set your own codec as user. Instead, the client automaticly conforms to the codec that is set for the channel you are in. So, if the channel is set to CELP 5.1, you will send and recieve CELP 5.1 encoded data.

So if you want a different codec, you need to edit the channel options.

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Tags: Change Teamspeak codec as a user, Teamspeak CELP 5.1, Teamspeak codecs, Teamspeak voice codecs