diagram

[dgtvbox]

Please draw a diagram of how you connected the keys and pedal to the arduino. Sorry, but I did not understand the description. Please help me figure it out.

[dgtvbox]

Please tell me how many simultaneous keys can work in this project? Is this keyboard dynamic? Matrix 8x8 normally open contacts and 8x8 normally closed? Is it necessary to install diodes and pull-up resistors?

[oxesoft]

Every keyboard scanner works in the same way: all the keys are queried every few miliseconds to get if it are opened or closed. For velocity keyboards there are two keys per note. Arduino Mega already has pull-up resistors internally activated on the line 108.

[dgtvbox]

Thanks. Trying to figure it out.