Greetings.
I frequently use a live guitar in my PD patches, I route it through the mic input [adc~]. But now I am facing a problem, that you might help me with.

I am interested in detecting in PD the moment of hitting the guitar strings with the hand, e.g. like using a hand to drum on the strings.
It is a very percussing sound, similar to a snare hit.

I would like to detect this hit on the guitar strings in PD (coming through [adc~]) and use it as a simple bang trigger.
It would be easy to use the [fiddle~] attack output, but I don't want the trigger on any other guitar playing event (e.g., chords, notes ...) except on this percussive hit on the strings.

Do you have any guidance on where to start to tackle this problem?
I don't have the slightest idea where to search for information regarding this topic.

@happilylazy
hey, there are different objects for different purposes depending on what you exactly want, have a look at [fiddle~], {sigmund~] or {bonk~].
if you just need a simple bang when exceeding a certain threshold, have a look at attack_det.pd , this might be a starting point, you could put filters betweeen [adc~] and [env~] to refine the results.

@happilylazy
check out william brent's timbreID externals, specifically the drum-kit example in the examples package.

https://github.com/wbrent/timbreID

or download via help -> find externals

@toxonic Thank you very much for your help. Indeed you helped me out a lot with your suggestions, especially to use [bonk~].

[bonk~] is really good, since it allows me to learn specific signal patters (i.e., in my case the hit with the hand on guitar strings), and it is able to detect it in the followup microphone coming from the guitar.

This hit detection got really messy using the [fiddle~] or [sigmund~] since there was a need to filter the power in specific frequency ranges and the amplitude of certain frequencies when the very percussive hit on the guitar strings happens. The problem is really complex if one wants to discern the guitar strings hit during a regular guitar playing with many events happening at the same time.