Add a real-time audio output for easier experimentations

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
UTILITIES: Better sin generator, implemented as a class

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
UTILITIES: Fix wav write issue when the float value was exactly 1.0

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
RTOUTPUT: Output a simple sinus

Signed-off-by: Gama <misept.dieseneuf@gmail.com>