Added audio time stretching by using the SoundTouch library.

Externals/SoundTouch/CMakeLists.txt

@@ -0,0 +1,15 @@
+set(SRCS
+	AAFilter.cpp
+	BPMDetect.cpp
+	cpu_detect_x86.cpp
+	FIFOSampleBuffer.cpp
+	FIRFilter.cpp
+	mmx_optimized.cpp
+	PeakFinder.cpp
+	RateTransposer.cpp
+	SoundTouch.cpp
+	sse_optimized.cpp
+	TDStretch.cpp
+	)
+
+add_library(SoundTouch STATIC ${SRCS})