Early FM synths were popular because they introduced elements into a sound that could produce more realistic simulations of acoustic instruments. However, they were fairly noisy. Native Instruments’ FM8, a software version of an FM synth, actually has a High Resolution Mode that enhances the fidelity of the sound by doubling the resolution of the internal computations. As a result, aliasing is greatly reduced, leading to a cleaner and more detailed sound. However, it also eats up more CPU cycles, so it’s best used on faster computers that have plenty of processing power.