Various warnings related to uninitialized variables, or setting values
to variables that would not be used later or would be overwritten by per
loop initializers.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>
The new spectrum mode is linear frequency. Both modes also now have a
lower range of 10Hz, where possible.
Signed-off-by: Christopher Snowhill <kode54@gmail.com>