Ok, so I am a newbie, so take it easy on me. when I look at a fingering chart, one thing I dont get is, when i look at low C, it is all valves open. no problem with that. but next up is a C#, valves 123 depressed, this is where I get confused, cause next on the chart is 123 depressed also, but this is a Db ( D flat?)? there is a bunch of these, D# is a Eb, G# is a Ab. so on. thanks.