Are there any particular notes on the trumpet that are inherently problematic? I know on other musical instruments like the flute there are certain notes that are just hard because of the nature of the instrument but doesn't have anything to do with being a high note. Is this the same for the trumpet? And while I'm at it I might as well ask if the experienced players need a warm up before they can play? If I rest just for 15 minuets my embouchure is stiff and I have to loosen it up. BTW I've only been playing about 6 months.