hello, i have a presonus firebox, a guitar hooked up to input 1, and LP9. input is firebox, output is built in output. when i select a track and enable it with I or R button so i can monitor the sound before i actually recording i get a very noticeable delay between touching the strings and hearing the sound. sometimes very brief, sometimes half a second? cant figure out why this is happening. this problem never appears when using garage band. any ideas?