Sorry Kat - I've heard the PVC pipe didj played and it's OK - but, again, very little back pressure for the learner and the PVC seems to lack something that the timber of a traditional didj confers - sort of like playing a polycarbonate violin as opposed to a good quality timber instrument - they sound good but the timber sounds better.

Had a quick check up of a booklet I purchased up in 'The Alice' when I got my didj and the Arrernte (I think I spelled it incorrectly before) refer to it 'generically' as a didjeridu (it's the name most folk recognise and they way I spelled it is the way they spell it) but locally they call it Ilpirra.

The same text refers to a neighbouring tribal group wo refer to it colloquially as 'paampu'. The only other tribal groups mentioned are from Arnhem Land closer to Darwin who call it the yirtakki and the yiraka.
But, again, the generalised colloquialism is didjeridu.

Mutt