Not bass or not... "rhythm" mak nhuma lakaram |^paki (maybe what you non-Yol\u call a "rhythm" yidaki). Yow (yes). Just between, eh? In the middle (suggesting a balanced yidaki, rather than an extremely high or low pitched instrument, or one with extremely high or low back pressure).
You know, so he can breathe. Didjeridu player, so he can breathe. He can feel everything right, because when he's blowing, everything inside is working as well. So he have to look after himself. So he chooses which one he wants to play.