added newlines to .py source files

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
modified speech extraction to add newline
makes output cleaner

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>
added sox testing info to docstring

Signed-off-by: Arvind Chembarpu <achembarpu@gmail.com>