Keypad code

[jetuser]

Spoiler below!

where do i find the keypad code for the gate where the dog is inside? i cant figure it out, i got the generator working and everything and now i need to unlock this automatic gate with the keypad. i've been in the storage room and got the radio too.

Spoiler below!

listen a bit closer to the other radio there, there's a piece of paper you picked up earlier that helps you out here

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OMG I KNEW IT, i knew thats what i had to do but how do i figure out what the sounds represent?

the last page on the paper tells you

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i see the last page but i cant figure it out i dont know which beeps go to which  . or -

Spoiler below!

longish beep = - short beep = .