Update README.md

jumbokh · Feb 21, 2019 · a7be6fb · a7be6fb
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 Every code here should run on every arduino board without problems. The sketches rely solely on the tone() function from Arduino, so the sounds are all monophonic. On the bright side, **libraries are not required**.
 
-If you want to compare the code with the original score, I try to group the notes in measures with lines and into staves with groups of lines. However, in some cases notes will be tied together among measures or be dotted and this rule is broken.
+If you want to compare the code with the original score, I try to group the notes in a measure as one line of ccode and the staves as groups of lines. However, in some cases notes will be tied together among measures or be dotted and this rule is broken.
 
 ## Hardware
 
-Just connect an piezo to the board and you are good to go. Pin 11 is used in every sketch because some piezo speakers can be connected between it and the close GND pin without any wiring.
+Just connect an piezo to the board and you are good to go. Pin 11 is used in every sketch because some piezo speakers can be connected between it and the close GND pin without any wiring. You can use basically any pin, as long  as they can be used as digital pins (pins A6 and A7 of the Arduino Nano and mini are analog only). Just remember to assign the pin number to the `buzzer` variable. 
 
 ![alt tag](hardware.png)