Friday 1 March 2024

Day Off Fixes

Today is a "Global Reset Day" so I took the opportunity to fix some things on the PacMan cabinet. First, I never hooked up the 2 pin header buttons to the 3 pin sockets - and so re-use the buttons from the original cabinet. After some research, I discovered it is as simple as "forcing" the 2 pin header into the socket leaving pin 3 disconnected. However, these buttons are cheap, and sound terrible side mounted. Then, my research on audio cables implied I should twist my speaker wires together - braid them - to reduce noise. I did this, and low and behold the hum from the HDMI connector to the speaker disappeared. I was able to remove the lo-hi pass filter and the sound is less muffled. Important to remember that the Odroid uses HDMI out, so with my last update, I need to reset sound output to the HDMI device. Also important to remember that over driving the ALSA mixer is a very bad idea (and MAME sound, like for Karate Champ, will clip out.) Good day off.

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