John Sauter wrote: > The proposal is for the internal format to be 48-bit fixed point, with
a reply indicating that 32-bit fixed point would be sufficient.
If we are going to have 24 bit data, we should really use 48 bit fixed point.
I suggest considering 32-bit floating point. Current DSP chips support it, it consumes no more bits per second than 32-bit fixed point, and it provides greater dynamic range than 48-bit fixed point.
You need to consider the dynamic range of the output DAC and the amplifier that you are feeding. You really aren't going to get more than 22 bits of output resolution. You just aren't going to get analog amplifiers with much more than 100 dB dynamic range.
So, unless you have a viable way to use the float data to drive two DACs and a VCA as the output buffer, you aren't going to gain anything with float data.
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