After a week trying out my new toy I can say that I am reasonably au fait with the lower octave. However, I find that maintaining concert pitch takes quite a bit more air compared to my other ocarinas. I have a big range including two Budrio models, a range of Langley pendants, a good quality double oc, and a Mountain C, all of which are no problem. Finally, up to now, I have been unable to have much success with the Coda upper chamber; despite many attempts, I can't even produce a consistent scale. What am I likely to be doing wrong - it's very frustrating.