Author: Philip Caron
Date: 2019-06-24 20:33
Do a leak test. There are several techniques for doing this that you can learn about online, but the simplest (not the best) is to close all the tone holes on the joint, block one end, and blow into the other end. If air escapes, there's a leak that needs to be fixed; usually you can detect where it is.
If a leak involves a pad you've changed, that's good info for the next pass. As Ken noted above, you can find instructions for changing pads online. It can be tricky, but if you're a do-it-yourself type then probably you can sort out the details and acquire suitable tools, and then it's just a matter of experience. But again, leak testing after each pad change is necessary.
Note, it might not be a pad problem. There are other mechanical failures that could produce your symptoms; for example, the bridge linkage. Usually problems like that can be isolated by straightforward testing and observation and deduction, but believe me, there are some pretty tricky failure modes that can occur. Again, experience matters. It's a joy to watch a good instrument repair tech work, and it can be very educational to talk to them.
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The Clarinet BBoard
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