Hi Steve,

Just to let you know:

In r6011 I have changed the filter loop in subtract65.f90 from a
time-domain convolution to a frequency-domain multiplication.  In my 
test case the speedup was a factor greater than 6.  Two-pass decoding of 
JT65 is now acceptably fast.  I think we have a definite winner!

        -- Joe, K1JT

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