[SoX-users] Global options such as --no-dither and --guard with libsox?

[m. m. <mj...@gm...>]

Hello,
I have two questions on cmd line global options and whether or not they
apply to libsox processing.

1. Is automatic dither enabled by default when using libsox?  If so, how
can it be disabled, and if not, does it need done per effects chain by
adding dither -a ?

2. Is there a global option for libsox equivalent to --guard, or does
headroom need added and reclaimed on an effect by effect basis?