I think the only thing you need to know is that "tx" is pronounced like "ch"
in "much". Anyway, here you have an
audio sample. If you did not get the picture, just listen some kalimotxo songs (in Spanish):
Eilen Jewell - Kalimotxo, a kalimotxo country style song.
Being born in Boise, Idaho, home of the biggest basque community in the US, we can understand that Eilen loves kalimotxo, the mascot of her band, as she said in an interview in Spanish.
In a live concert in Madrid she explains as introduction: "This drink is for teenagers, right? but we like it... a lot. We are young in our mind, in our heart, young forever, then we must play 'Kalimotxo' ".