64bit audio read and write

[Matt Flax <flatmax@flatmax.org>]

Hi there,

I currently use libsox to load and save audio data. I was wanting to 
write and read 64bit data, however the generic sox sample type is 32 bit 
(from sox.h) :
typedef sox_int32_t sox_sample_t;

The basic format of the read (and write) functions are :
size_t sox_read(
     sox_format_t * ft,
     sox_sample_t *buf,
     size_t len
     );

Can anyone tell me the basic methodology for reading/writing 64bit audio ?

thanks
Matt

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