No more fiddling with Threshold, Hold Times, etc. Unlike compressors, the SPL Transient Designer can transparently shape the attack and sustain characteristics of any sound, no matter its level - super loud or whisper quiet, constant or fluctuating.
The analog Transient Designer and its plugin counterpart both use SPL's Differential Envelope Technology for just that.
For the first time ever you could control dynamics, independent of the levels! SPL revolutionized the recording and live sound industries with their introduction of the Transient Designer.