New SAC 4.7 Released

Some changes that impact use with newer Win10 updates and newer driver releases from a few different manufacturers.

Bob L

Version 4.7
Enhancements
* Modified the main engine threads to make the engine more immune to slipped buffers. The new design makes it harder for Windows background processes to step on the main engine threads, therefore making the code more stable and less susceptable to buffer slippage.

* Added Soft-Clipping code into the Attenuator routines to prevent wrap-around clipping when recording in SAWStudio with the SACLink and adding gain to the channel input with the attenuator control.

Bug Fixes

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