By placing my hand over my mouth i instantly have a compressor that distorts any air or sound in my mouth. All i do then is, with my mouth open, "hoot" or yell in short sharp bursts to make it sound like a dog.
Series of extra and/or ultraterrestrials vocalizations, perhaps ancient and lost tribes -dialects of unknown origin. Low to midrange. From the soundlab. Enjoy!.
This is what i imagine cave johnson would broadcast from behind the grave in city17 after combine invasion. Written, performed and mixed by yours truly. Feel free to use this in half-life 2 mods, memes etc. Linking to this page would be appreciated, but it's not necessary.