[Discuss-gnuradio] Wither 64 Bit A/D?

[Spencer Tom Tafadzwa Chirume]

Why is the Analogue to Digital process described at 32 bits(for some Audio  
ADC chips) and seemingly no such specs for RF  DSP, anyhow how exactly can  
one hope to achieve 64 Bit A/D since there's 128Bit  DSP boards about. Can  
one build a set of ganged  ADCs such as 4 * 16 Bits or 2 * 32 Bits? What  
is the best way to get hign bit rate conversion on paper?