I am using Logic Pro X 10.3.3 with a MOTU 24i/o interface using El Capitan OS. Have recorded drums and bass with no problems as all audio plays back in sync. Decided to record guitar and set-up for software monitoring in order to use a plug-in for guitar. Set up a buss for the plugin then decided not to record that way. Disabled software monitoring and checked settings. Recorded guitar with no latency issues while recording. On playback guitar is out of sync with previously recorded audio tracks. Recording delay set to 0 samples and i/o buffer size set to 128. Set-up a new project and imported drum and bass files. Recorded guitar with no latency issues while monitoring. On playback of guitar track it's still out of sync with other tracks. Have had this problem before lately but can start a new project and all recorded tracks are in sync on playback including new tracks. I downloaded the latest MOTU driver for the 24 i/o and also removed Logic Pro from my Applications folder and downloaded and installed Logic from the App Store from my purchased software. Same problem. Anybody else have this problem before?