Hello, I use logic for playing live with other musicians. If we play a set from 1 1/2 hour i put all the songs together in one big mastersong with all the tempochanges and with markers for the different songs. The last Gig was a little hard, because i had such a lang latency between playing on my Keyboard, this was not normal. If i create a new Song there is no latency. But if I load that Gig Song in i have latency on all Instruments. I am an old expierienced Logic User but this is absolut a new effect and i am not found out what the reason for this strange behavior can be. I have nothing in the midisignal path. It must be a setting in this particular Song. I use logic 7.2.3 on a 17" MacBook Pro with 2 GB RAM. A Fireface 800 Audiointerface and a Axiom61 Midi Keyboard. I play also only Logic Virtual Instruments and Absynth 4 Any sugestions are welcome Thanks in advanced Derek Hauffen