Question about sheet music for piano?

hi just wanted to know this..


you know how there is like a flat, sharp or natural sign before a note in the sheet music..does that mean you only change that note or does it mean all of them


http://www.sheetmusicplus.com/store/smp_鈥?/a>





like the one on the 2nd partQuestion about sheet music for piano?
I was a music major in college so let me see if I can describe this to you!





A measure is anything between two barlines. Barlines are those horizontal lines that separate a few notes at a time. I hope that makes sense! When a sharp, flat or natural sign comes before a certain note like in the second part it is right before that first B i think.... that means every B in that measure is flat. Not every note, just every B.





So if a sharp, flat, or natural sign comes before a note.... it only changes that one certain note and any others that occur in the measure. In other words if you have a flat before a B in a measure of this..... B A G A B A G....... just the B's would need to be flatted. After the next barline or the end of that measure everything would go back to being as written until you see another sharp, flat, or natural sign.





I hope that helps... I was trying to explain everything so you wouldn't be confused!