Looking for a simple transient detection method

Howdy,

I'm trying to do real time transient detection on my guitar. I've tried using fiddle but there seems to be a delay of about 60 ms even with audio interrupt on. A window size smaller than 1024 seems to cause the transient detection to get considerably worse.
I'd like to do detect transients as quickly as possible. The basic goal is to remove the attack from my guitar. This involves a delayed version of the signal (by as much time as the transient detection takes) being turned down when the transient is detected in the non-delayed signal and then finally faded in.

This works fine with fiddle and a 60ms delay but I'd like to keep the delay as short as possible, preferably less than 10ms and even less if possible.

Here's what I've tried:

The rms is computed for a window of time at two different points in time. They are divided to get the ratio between their amplitudes. If this ratio is greater than some number then edge~ outputs a bang.
Its working quite well as long as there is no previous note sustaining to any significant degree.

I've also tried lowpass filtering the pre attack (delayed) signal and boosting the highs in the other to increase the contrast. No luck getting it reliable enough though.

What do you guys use?