Music Unfolding - SubRingFM (Mac/Universal)

SubRingFM is the 5th of the Twister Series, a new line of Audio Unit effects from Music Unfolding.

From the homepage:
SubRingFM is a ring modulator. It also has two filters for shaping the sound. It also has a suboctave generator. And the oscillator can be manipulated using FM.

The effect runs through a pre-filter to the ring modulator to a post-filter and then into a sub-octave generator. You can use the pre-filter to reduce the number of harmonics in the input signal and use the post-filter to shape the resulting tone. The ring modulator oscillator in SubRingFM is an FM oscillator. So, the resulting output can be made to contain a very complex set of frequencies. This can then be shaped using the post-filter to get a really wide range of sounds. Then the sub-octave generator is applied. The result is pretty amazing.

$19.99 US. Requires OS X 10.4 or higher.