I have a dummy question, how to change variable on a file directory (xx) ? samplerBank/xx/$1.wav

@Butahuruf Use another $ variable and pack the directory and the file names into the message.

This way you change directory, and then the message is sent when you bang in the file number.
Swap everything around if you want to set the file before the directory.
David.

@whale-av thx David!