After my transient shaper, some people told me it would be nice to have a splitter: split the signal in two tracks, one with the transient, another with the sustain. For instance, it would be interesting to apply a different distortion on both signals.

So for instance this is what could happen for a simple signal. The sustain signal is not completely shut off, and there can be a smooth transition between he two signals (thanks to the smoothness parameter). Of course, the final signals have to sum back to the original signal.

I may end up doing a stereo version (with M/S capabilities) for the splitter, but maybe also another one with some distortion algorithms before everything is summed up again.

Let me know what you think about these idea.