Lesson four : basic musical tones on the piano keys & Musician measurement

 first :  basic musical tones on the piano keys :

                                               C    - D    -   E    - F   -   G   -   A  -   B

Next video will explain it better to you :

second : Musician measurement :
 if you want to know the distance between tow places of course you will use “ meter “

but if you want to know the distance between tow keys you will use “ tone “

the distance between any key and the next one “ even thaw it was black key “ is 1/2 tone

so the distance between C key and D key = 1 Tone

the distance between E key and F key = 1/2 Tone

if you really anded stand what that mean you can tell me the distance between C And F !! ( leave it in comment ) 

so now i think that you want to ask me about the black keys

to know how we call a black key and how can we write it on Staff you must know about tow signs will be very important to you :

Flat - Bémol

Sharp - Dièse

first one is “ Flat “ and it means “ before “ or “ the key subtract 1/2 tone ".. so if we want to call the black key before D we can say ( D Flat )  

second one is “ Sharp “ and it means “ After “ or “ the key Plus 1/2 tone “ so if we want to call the black key After D we can say ( D Sharp )  

and there is other secondary signs in eastern music :

Half-flat 

first one is “ Half Flat “ and it means “ 1/4 before “ or “ the key subtract 1/4 tone ".. so if we want to call the 1/4 Tone ( not a key because it’s not on the piano keys but we can get it on other instruments like violin ) before D we can say ( D Half Flat )  

Natural

second one is “ Natural “ and it means “ 1/4 After “ or “ the key Plus 1/4 tone “ so if we want to call the the 1/4 Tone ( not a key because it’s not on the piano keys but we can get it on other instruments like violin )  After D we can say ( D Natural )  

so now you can tell me the keys that don’t have a Flat key !!

and also the kew that don’t have Sharp key !!