I believe the course of action is clear, admins. Remove Anuv's permamute. He has provided a logical explanation and visual evidence to account for his use of a voice changer, and has dully "apologized". Should he/she use this software again, he/she will be permanently muted, and no appeal will be accepted.
@Anuv: I ask for you to be more careful with this software. It's not a grievous offense, but it can annoy some people. Check this voice changer is OFF before playing in CG servers, that is all we ask.
Admins have mentioned you demonstrating a certain lack of respect in servers. This is a separate and much more delicate issue than simple "voice change software" and you should be even more careful with this. I understand that it might have all been simply a by-product of the mute, but still, it's always best to come to the forums and make a concise and clear-headed appeal (as you did) than saying things in the heat of the moment.
@Admins: Always be careful with "trolling". I understand the concept of "Its Ok between friends", but when we talk about adminship, we walk a thin line. Have in mind that words can carry different meanings to different people, and what you hoped would pass as a joke to someone, turns out to be disrespectful to them. Just be careful.
