Cob straw partition insulation

[Keith Breuker]

Have completed the exterior of my straw bale house.  the interior has
some 2x4 partitions that will be drywalled.  I am considering using
straw or light straw clay to insulate the interior walls mainly for
sound reduction.

Is it necessary to use clay treated straw?  Any other thoughts,
pitfalls?

Thanks

Keith