Sony Acid - Volume Indicator (redline)

One important factor to keep an eye on are the volume settings, especially the Master Volume level. You never want the Master volume indicator to redline while playing your track because it will mean an ugly sounding track once you render it. The appropriate setting all depends on what each volume setting you have on your tracks but I personally think that -7 for most track is appropriate and a Master Volume setting of ~18. Keep an eye on the redline indicator just above the Master Volume setting. If it hits, that means that you have to lower it a bit until it comes off of the redline.