Generally, I can read music, but I'm a little confused by a couple of things in two Chopin scores I've been playing around with. First, in the Op. 10 No. 1 Etude in C, the very first measure contains a left-hand octave in C held for eight beats; however, the first note in the right hand is the 1/16 note played on the same note after a 1/16 rest. How do you play that C in the RH if you're already holding it in the LH? Is it simply written so that your hand starts out playing the full C arpeggio? Is it not actually audible in the RH? I don't get it.
My next question concerns the Op. 64 No. 2 Waltz in C# minor. In measure three in the RH, there are two accidentals on the F, first a natural followed immediately by a sharp. What does this mean, and which of the two takes precedence here? In the previous measure, F has a double-sharp. Is the natural there simply to cancel out the double sharp and make sure I don't interpret it as a triple-sharp? That seems unnecessary as an accidental only is in effect for a single measure.
TIA.