> > clipping--represented by vertical red lines on the > > time line. Ah wait a minute, I overlooked that "vertical red lines". Are they single, isolated spikes in the signal? Then they are glitches, not clipping, and they could indeed be caused by the digital stuff Mark is talking about, or by some analogue problem during recording (such as a nearby fridge thermostat switching on). Also, the glitch removal software described by Mark is likely to work very well (glitches are much easier to remove than clips, you could even do it manually in a sound editor where you can zoom in a lot). Sorry all - will keep my mouth shut in the future. Oyvind.