The StroboSoft tuner from Peterson is a software (PC or Mac) version of the strobe tuners for which Peterson is famous. If you don’t know what a strobe tuner is, it is a tuner that works by triggering a strobe light from the audio signal of the instrument you are tuning. The strobe light illuminates a rotating disk with markings that is spinning at a constant speed based on the pitch you are trying to tune to. This effect of this is that if your instrument is tuned to pitch, the disk will appear to not be spinning, if you are flat or sharp, the disk will appear to spin in one direction or the other at a speed proportional to how far off pitch you are. So when you are tuning, you see which way the disk appears to be spinning and adjust the tuning appropriately until the disk slows down and eventually stops.
