Wavesfactory Flash

Best for fast, transparent results with handy M/S and mix control. Flash is a free transient shaper by Wavesfactory. It is available for both Windows and macOS and comes in VST, VST3, AAX, and AU plugin formats, with native support for both Apple Silicon and Intel-based Macs. The plugin offers a sleek interface with Attack and Sustain controls, a Mid/Side knob, and a handy gain reduction meter to help you monitor the amount of transient processing.

Despite its vintage-looking GUI, Flash is quite precise at shaping the sound’s initial impact and handling the sustain. It is modern audio DSP code at its best. I love that Wavesfactory included a mix knob, enabling easy parallel processing. It lets Flash add snappiness to drums, guitars, and keys without sounding unnatural. You can dial in just the right amount of transient shaping, keeping your sounds punchy but not overprocessed.

Another cool feature is the built-in clipper on the output path, preventing unwanted signal overages when manipulating transients.