hi thanks for the valid help and advise . this time i will use the bar settings as this worked fine for this play around project.
just out of curiosity is there a way i can stop all instruments apart from the slap bass for say 1 or 2 bars (say bars 10 and 11) but still carry on playing and bring back in all other instruments at bar 12 ( ie a stop )

also any advise on some real tracks which would give me a status Quo sounding 12 bar backing track ,are the any such real track ?
once again thank you for everyone`s help and advise.
are there any rockabilly users who are members of the forum
thanks tj