samer@32: function map=dftmap(edges,NFFT)
samer@32: % dftmap - fmap, standard usage for DFT
samer@32: %
samer@32: % dftmap :: 
samer@32: %    [[L]->0--0.5]   ~'normalised frequencies of edges',
samer@32: %    N:natural       ~'DFT size'
samer@32: % -> [[L+1,dftbins(N)]].
samer@32: 
samer@32: map=as_fmap(NFFT*edges,dftbins(NFFT));