i tried with the Y cable and i did not notice degradation in my sound.. although for peace of mind i ordered the lehle p split II from thomann. lol
for those who care, here it is what i want to do.
the signal of the bass goes directly into my markbass compressore as i believe it is the best pedal i have and want to use it as an always on pedal...
then i want to split the signal so the markbass output will go into the lehle splitter. then in my mesa titan i will use channel A for pure clean bass sound and channel b for effects. so, one of the outputs of the lehle will be directed into the mesa and the other output into my rocktron patchmate 8... then i will control the effects (mxr octave, mxr envelope, sansamp vt, carl martin chorus and mxr carbon delay) with the midi mate/patchmate.
the titan footswitch will control the switching between channels.
the lehle will be important because when i bypass all the pedals with the rocktron, the sound does not have the same strength as when plugged directly into the amplifier.
i hope to solve my problem this way. the markbass like stated will be an always on pedal as i like it so much.