show scale - when this is checked, you can see numbers on the color volume indicators.
analog simulation - when this is checked, the scale on the vu meters changes from a digital audio scale (with 0 db at the top of the scale) to an analog style audio scale that puts 0 at the dividing line between the green and yellow parts of the scale, with positive values for red and yellow parts of the scale and negative values for green parts of the scale.
resolution - you may choose which part of the scale you would like to view. you may view from 60 db, which includes the entire red, yellow and green range, or you may zoom in stages until you are viewing just the top 12 db, which includes just the red and yellow range.
lock left/right - checking this box locks the left and right audio channels, so that when you drag one slider, the other one is dragged by the same amount. to temporarily reverse this setting, hold down the shift key while you drag a slider.
notify on audio saturation - when this box is checked, a small window pops up when audio saturation is detected. if you want to record or playback audio without audio distortion you will need to turn down the audio levels when saturation is detected. this window can make it difficult to use the sliders during audio capture and will stop timeline playback, so there may be times when you will want to disable this function. whether or not this function has been enabled, the red warning marker appears on the vu meter when audio saturation is detected.