First of all: Thanks to Shea for such a great emulation package for Pi, and thanks to the community for being so active and helpful...I AM LOVING PiMAME.
I am, though, having a small problem with HDMI audio only with MAME4ALL: every game makes the same crackly, drone-y, static-y sound. Audio seems totally fine in AdvanceMAME, FBA and GNGeo...only MAME4ALL is giving me "static." I am overclocked to 900, and I ran the update script last night, so should be on the latest versions. I tried halving the sample rate to 22050 in the MAME4ALL config file, but this didn't seem to have an effect. Any ideas on where to go next?