I am having the same problems (whatever file I try and play back through XBMC playback is double speed - maybe more - and audio distorted - all files play fine through VLC) with a new install of Gotham on:
mac Mini early 2009
Model Name: Mac mini
Model Identifier: Macmini3,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MM31.0081.B06
SMC Version (system): 1.35f0
NVIDIA GeForce 9400:
Chipset Model: NVIDIA GeForce 9400
Type: GPU
Bus: PCI
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0861
Revision ID: 0x00b1
ROM Revision: 3362
Displays:
SAMSUNG:
Resolution: 1920 x 1080 @ 60Hz (1080p)
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Television: Yes
Architecture x86_64
I can find no SVN number on the system info pages, instead there is: XBMC 13.1 Git:20140604-84725b0
Log File:
http://xbmclogs.com/show.php?id=241308
I really like XBMC and I'd love it to work on my mac mini. Any help gratefully received. thank you.