Re: Advances in Synths
By Zoltán Jánosy
> Would it be practical to sample the _touch_ of a 9' Steinway, and use
> feedback to a motor on each key of the synth keyboard to simulate that
> touch? "Motor" in this case would be a voice coil, or some other
> solenoid form.
A touch-feedback system like this has been developed at Stanford CCRMA (Center for Computer Research in Music and Acoustics). The term used for this kind of devices is "haptic interface". I don't know whether they have sold it to a company, but I wouldn't be very surprised to hear that (Yamaha's two ground-breaking inventions (FM and physical modeling) came actually from CCRMA).
You can find more info at:
http://ccrma-www.stanford.edu/CCRMA/Overview/node49.html#SECTION0043500000000000000
(it really has those zeroes)
Zoli
---
Zoltan Janosy, M.Sc.El.Eng. <zoltan.janosy@hu.bonus.com>
Appaloosa Online Ltd. (formerly Novotrade Software Ltd.)
H-1122 Budapest, Varosmajor u. 12-14., Hungary
Tel:+361-213 0349 Fax:+361-155 2293
[ Editor's Note: Yes it does have all those zeros. And for those
[ of you who don't want to type all of those, here's a text excerpt
[ from the Web page referenced above.
[
[ Jody
The Touchback Keyboard - Brent Gillespie
A virtual piano action (a mathematical model), a simulation algorithm, and a set of 88 single degree-of-freedom haptic display devices constitute a promising means to make a synthesizer keyboard feel like a real grand piano. Other keyboard instruments could be simulated with the same device at the touch of a button. We propose, then, to simulate the feel of the grand piano by numerically integrating the equations of motion of the multibody piano action in real-time in a human-in-the-loop simulation scheme. As the integration proceeds, the finger-key interaction force is computed and generated by a haptic interface. In addition, the motion (needed for use in the integration) is sampled from the haptic interface hardware.
We believe that haptic (tactile/kinesthetic) feedback from an instrument, in addition to the aural feedback, plays a crucial role in the process by which a keyboardist controls the tone and timing. Further experiments in human-computer interaction can be made with arbitrarily determined dynamical behaviors of the keyboard.
The behavior of the simulated piano action should appear passive to the user even though it is realized with active devices. We seek design guidelines which will ensure that such dynamical behaviors characteristic of active objects (chatter and stickiness) will not arise. Applications of both linear and non-linear analytical tools are being applied to this end. |
(Message sent Wed 5 Jun 1996, 15:12:36 GMT, from time zone GMT.) |
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