[kj911]

Tested again, different Win7 x64 PC (Previously used PC: XP SP3, DLZ 64MB dict size....)

Its winner?? LOLZ!

unpackmp2 only archive: 335 766 506 byte
unpackmp2+srep:m3f:a0:l32+msc:raw=1:tak=9 (masked comp. named in v2) archive: 314 510 792 byte

Tested Ocarina 0.6 compressor:
unpackmp2 compressed archive: Failing in compress
v2 (unpackmp2+srep+msc): 172 074 214 byte

DLZ with 512MB Dict. size:
unpackmp2: 159 505 095 byte
v2: 159 618 382 byte

Razor 1.03.7 x64 with 512MB Dict. size:
unpackmp2: 157 403 746 byte
v2: 157 526 068 byte

LOLZ v22c4b:
unpackmp2: 150 686 438 byte
v2: 153 138 005 byte

Ocarina 0.6: level 12 chunksize 256MB
DLZ: -slp -d512m -lp0 -fb337 -mc8192 -cu3 -cm43
LOLZ settings: lolz:dt:dtb1:dtw1:dtm1:dto1:dtd1:mtt1:mt4:d160m:fb a4096:tt16:mc1023

Goodly winner: unpackmp2+lolz

Directly compress pure MP2 file.
Size: 201 348 000 byte

Ocarina 0.6: Failing!
NZ0.09/cO/768m: 184 169 837 byte
LOLZ: 189 974 702 byte
DLZ: 187 631 951 byte
RZ: 185 784 860 byte

Any ways, trick from modify "unpackmp2" from preprocessing any files? BIK, MP3, WAV?