This is copied from my original post here on ddjt, just reformatted a little 😉
it’s incredibly easy to modify the registry values, just be careful as there is no safety if you mess something up.
this is from the wiki
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DefaultScratchLatency: (By default 2205 samples = 5ms)
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[INDENT=1]Latency of the scratch.[/INDENT]
[INDENT=1]If you get a value smaller than the audio buffer latency, it will use the audio buffer latency anyway.[/INDENT]
[INDENT=1]So if you put 78 (or 1), it’s like putting 512 (or whatever your audio-buffers are).[/INDENT]
[INDENT=1]But to keep a “good” sound, the DefaultScratchLatency is supposed to be kept bigger than 2 times the maximum delay between two MIDI (or HID or mouse) messages.[/INDENT]
[INDENT=1]That’s why the default has to be kept big.[/INDENT]
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http://www.virtualdj.com/wiki/RegistryValues.html
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just open the start menu, then type “regedit” in the search box…

then once you okay the security, you need to open the filepath to virtual dj, shown down the bottom of the image. when you locate DefaultscratchLatency double click it

then finally when you have double clicked it will open a window, first change the value to decimal, then enter the latency you desire. mine is actually set to 960, this is just to show you guys what was recommended by cstoll

this was done on a 32bit windows 7 starter netbook, i can’t imagine it would be any different on any other windows OS