Emulating accordion bellow shake for Synth keyboard

[kle333]

My Tyros got nice accordion sounds, but I wished I could somehow add that missing bellow shake. I was thinking that might somehow be possible?  So, far my limited electronics knowledge led me to think of achieving it in one of these ways:
Roland accordion's "Innovative Dynamic Bellow" has it, too. I wonder how they created it?
- It might be possible to do it with the 3-axis accelerometer, because it can be adjusted to volume control of the Kbd. So, by shaking the hand this effect can be created and varied?  Important is that the effect changes start (like reeds) from "0" and has steep envelop patterns; almost like a tremolo. i wished to find out how the Roland bellow control works?

My two project ideas are:
1) It might be possible to create that "sawing type" of bellow shake via LDR light variation or via a pressure sensor?
My old Elka49 organ had such a foot volume pedal. It had a little black box. Inside was a division wall with a width increasing slot, through which a bulb light beam was directed at an LDR. One one side was the bulb light and on the other side was the LDR. So, when the slot size increased, more light hit the LDR and the organ volume increased!
This process could be RF controlled via a finger mounted ring gadget, like in HotHand. The light slot slider could even trigger a slightly different filter, emulating minute timber change of reeds. So, the idea of a light controlled gadget with remote control is not a bad idea, after all...

2) My other, an even better idea, is to use a Mini Mercury switch on a finger ring to control the on/off chord volume via a tiny RF transmitter. This switch could also control a little circuit, which tailors the sound's envelope; i.e. for instance filter the sound every second shake to compensate the slight reed changes. A tiny low voltage filament bulb (not LED) has a small turn on/off drag, simulating accordion reeds. This bulb then sheds its light onto a sensitive LDR, controlling the Tyros Kbd. chord sound. I also got that Yamaha MFC10 MIDI controller and parallel wired its high quality 10K foot volume/expression pedal. So, any LDR responds perfectly.

So, what's your take on that? Since your electronics knowledge is able to think of even better solutions, I would be delighted if you could kick me to success. I'm a young pensioner (75) and enjoy playing wonderful sounds and melodies. Adding that bellow shake variations would enrich any melody in many ways. I attach some interesting data, which might help to pinpoint what I'm after:
https://app.box.com/s/brj4xktxo1tv3xa8m832nbnr4hx0fnoz

[anotherjim]

I can't help thinking that Tyros might already have some ability to do something itself - if its keyboard has aftertouch, that should be programmable to it some way. I don't know the Tyros - have you looked for specialised forums for it?

Or, are you after making a strap hanging accordion-like rig using another midi keyboard to play the Tyros over midi?

[kle333]

It's just for personal contentment...
I already tried all tricks in the Tyros. The nearest I could create was a kind of automated echo effect, which is just not good enough.
Feelings cannot be mechanized, that's why I'm looking for something, which allows manual control.