The 1200 MFLOPs of the XMOS is plenty for 10 PEQs at various sample rates. You need about 120 MFLOPS for double precision..The best accurate DSP you can reach in computer environment at 64bit or 80 bit floating point resolution with processing result converted to the desired target fixed point resolution. Resource constrained few dollars costing hardware chips will never do it on that level - they miss both computational power and resolution of our computers.
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