Sonja
The dialects of Tibetan are very diverse. You'd have to pick one.
Due to vowel harmony, the second vowel is a bit higher than [o] for most
speakers.
The second syllable could be [tsok] or [tso?] or [tso:], depending on
the speaker.
I can't tell from the spelling what the tone on the first syllable is --
a two-syllable compound like this could be either HH or LH.
John.