The issue has been raised again regarding the prospects for a 'Technical Forum' on this site (see 'The Trumpets are Closed?'). Some have suggested that our membership is not mature enough to handle such delicate subjects and we need to stick to such matters as where to find a good repair shop or how long to blow a steady tone during practice (Oh wait! - we can't agree on that either!) Well, this is a test to see if we can address a technical issue and still remain friends...We are...friends....aren't we?......(Oh boy! This is going nowhere fast). But, here goes. On the sticky thread titled 'How Does a Trumpet Work?' (which is a sort of mini-technical forum, I guess), Nick has a series of videos in which he discusses the issue of standing waves, fundamentals, harmonics, etc. as they relate to how a trumpet produces notes. In the second of those videos, he demonstrates a PVC 'natrual trumpet' and then compares its function to that of a real natural trumpet. As I watched that video, I was struck by how much the PVC 'trumpet' resembled a trombone. It seems to me that the PVC pipe was completely cylindrical except for the 3 1/2 inches of taper in the mouthpiece and the 4-5 inches of the funnel "bell". As I understand it, a trombone is pretty much the same - cylindrical except for the mouthpiece and bell. The natural trumpet that Nick played had much more conical bore to it which I understood was the main reason that the real thing was much more musical than the PVC version. My question is, if the conical bore of the natural trumpet is the key to its musical nature, how does the trombone achieve that? On the other hand, if the PVC pipe could make a recognizable version of a natural trumpet, is is possible to use a mouthpiece adaptor and put a trumpet mouthpiece in a trombone and turn it into a natural trumpet? Has anyone tried this or even thought about it? I hope this topic is sufficiently lacking in controversial content that it does not set off a firestorm on day one of this experiment in rational thought and dialogue. Come on guys - we can do this!