mk_dbdecim only Lb,Vb,Vl    channels are produced
mk_dbdecim1 -   Lb,Vb,Vl,Mb channels are produced
they are differ only by subroutine loop (mk_dbdecim) or loopnew (mk_dbdecim1).
The last one has extra lines:
772d771
<        samprM=4.0
798,806d796
<       call changer(idbout,dir_o,ituple,istep,chan_n,sampr_n,
<      + nctuples,nituples,ishift,nsen,nins,nsitch)
< C---------from B to Mb-------------------------------------------
< 	chan_n='        '
< 	chan_n(1:2)='Mb'
< 	chan_n(3:4)=chan_o(2:3)
< 	istep=1
< 	sampr_n=samprM
< 	ishift=6
