lordmonkus said
For possible no sound fix look in the Driver menu and change the audio setting. It should be Xaudio but you may or may not need something else. Also look in the Audio menu and make sure Audio Enable is set to "On", Audio Mute is set to "Off" and the Audio Volume Level (dB) is set to 0.0 which is the proper volume, you may have set it to a negative value at some point.
For possible speed fix enable Vsync in the Video settings, this isn't an ideal fix however and should only be enabled if you have really bad screen tearing. You can also go into the Frame Throttle menu and set Maximum Run Speed to 1.0x, also turn Throttle Menu Framerate to "On" otherwise your Retroarch menu could be too fast. This may or may not work. I know I have had this issue of games running super fast before but I cannot remember how I fixed it.
If these don't fix your issues you can try the Retroarch forums, they are generally very helpful and friendly.
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