I was curious if anyone is experiencing audio distortion problems starting with MAME 0.173 with the refreshspeed and triplebuffer options enabled in mame.ini? Donkey Kong and Xevious are good examples. I confirmed that 0.172 and several prior versions do not have this issue. All other options in mame.ini are at the default setting. Using MAME 64 bit on Windows 10 64 bit, processor is Intel Core i7-4790K (4 GHz), 16 gig mem, NVidia 780ti Video card with latest drivers with a Samsung LED 1080p monitor. Using triplebuffer to fix screen tearing in games like Xevious and refreshspeed to previously fix audio distortion, hiccups, etc. I've been successfully using MAME for years with these options and this problem just occurred with 0.173.
Not sure if it helps, but see the following link where Aaron Giles previously fixed this:
http://mametesters.org/view.php?id=2622
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MAME 0.173 refreshspeed and triplebuffer options cause audio distortion
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