on 03/10/17 15:37, T Molnar at tam at em.ca wrote: I bought my tibook used without a manual, but since no one replied I'll give this a shot. Someone correct me if I'm wrong.... In the audio business, there is "mic level", which is very low, several millivolts, and "line level", which is much higher, several hundred millivolts. I believe that the line input on a to bit is "line level", which means it won't work with your microphone. It's also a 3-conductor stereo jack, which your mic is probably 2-conductor monaural. You need a preamplifier to boost up the level etc., or more practically, an external A/D converter which will handle either mic or line level, such as the Griffin iMic (which is not a microphone, but that's another issue). It has a switch on it to select "mic level" or "line level".