Running Garageband 11 and editing podcast and playback is sticking. Can hear voice, but doesn't playback smoothly so can't edit.

Running Garageband 6.0.4. Editing a podcast consisting of me interviewing someone. Click for playback in order to edit, will hear voices, but the playhead sticks in one spot and then jumps ahead, as opposed to playing smoothly, so makes editing impossible. Any ideas?

Martin

I'm running on an iMac, with Intel Core i5 with 8 Gigs of DDR3 Ram and hard drive

Capacity: 1 TB (1,000,204,886,016 bytes)

Hardware Overview:

Model Name: iMac

Model Identifier: iMac11,3

Processor Name: Intel Core i5

Processor Speed: 2.8 GHz

Number Of Processors: 1

Total Number Of Cores: 4

L2 Cache (per core): 256 KB

L3 Cache: 8 MB

Memory: 8 GB

Processor Interconnect Speed: 4.8 GT/s

Boot ROM Version: IM112.0057.B00

SMC Version (system): 1.59f2