3d Printed Audio in port for your 464
From CPCWiki - THE Amstrad CPC encyclopedia!
When I was looking to create an Audio in port to my Amstrad CPC 464, I didn't want to drill a hole in the case.
I designed this as a substitute that fits into the vents at the back of the amstrad cpc 464.
This was designed to be used with the following modification: DIY_464_External_Audio_Socket