Thanks for taking the time to help troubleshoot. You went way above and beyond the Bulletin Board standard!! I have seen your videos and they are great example and tutorials.
Three things come to mind. I am familiar with Roland in general, and would advise the following three things to look at.
One - Look for MIDI overflow parameters within the 909. It is very easy to trigger extra MIDI note data on a Zendrum and not realize it. Depending on your sensitivity settings you might also be triggering more than one trigger on your Zendrum and it will add up. Your polyphony might be getting used up with out you hearing it.
I think overflow is a major part of my problem. I jacked up the noise floor and played extra soft (to avoid accidental triggering) and it still happens
Two - Within the 909 you should look to see if there are any kind of mute groupings. If you have a mute group on any of your sounds, you can end up with some of the problems that you are having. A good example of mute groups is hi-hats.. A closed sound will stop an open sound. This allows us to play without a pedal.
Pretty sure it's not mute groupings. I set them manually and only for Hi Hat Pads. I wish it was this it would be simple
Three - Look at what MIDI CCs are enabled. If you don't need a specific MIDI CC it should be turned off. You may be sending other info to your 909 that you don't need, but will screw up what you are trying to do.
The Zendrum sends CCs? It's the only thing hooked up to the 909. I have a sneak suspicion about CCs and I will look deeper. . .
Another funny thing I have observed: It seems that the longer I play, the more the problem goes away! So when I first fire up (909 and sound system first per the Zendrum instruction manual) all sounds clip. The only way to get a sound to decay is to hold the sustain button on the back of the Zendrum. After playing for a while, some sounds will begin to play through as intended and I would say after 10 minutes everything is fine. The only thing I do/change is press the sustain button. Weird. Weird Weird. I am thinking that I will go to a dedicated drum module like the Alesis and only trigger pads from the 909 (see post in Question regarding outputting on multiple MIDI channels?
on how I setup)
With all that said, the Zendrum is AWESOME wow. The look and feel, craftsmanship are all oustanding.