Coding GPIO high/low input pins on Scratch

Hi,

I am completely new to scratch and I was wondering what the most simple way of coding GPIO high/low input pins were? I was hoping to implement cases where, when a certain GPIO pin is low, a note is played from the midi sound system using a pHAT DAC with a Raspberry Pi Zero. Any help would be greatly appreciated.

Please help.

I didn't find the right solution from the Internet.

References: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=207478&sid=eb078a178e2be71f6b91908da29c4206 [url=https://blog.advids.co/20-booking-software-video-marketing-examples/]Booking software video[/url]

Thanks