As others have stated, 64-bit architecture vs 32 bit, has nothing to do with a Single Precision Float vs. Double. 

Yes, one can bitcrush from Double also. 

On Sun, Jan 5, 2020, 10:14 AM Adenosina Tri Phosfato <porres@gmail.com> wrote:
Em sáb., 4 de jan. de 2020 às 12:24, William Huston <williamahuston@gmail.com> escreveu:
Funny, I have grown to like the "bitcrush" style distortion
from using the existing single-precision method. 

but you can do bitcrush and reduce resolution from 64bits as well, right?