Disklavier

Hi Richard

Now I knew it was too good to be true. Thank you for your technical 
input. It stands to reason that you would not want crosstalk between 
units on stage.

Thanks
Midi Magic

> 
> It's not encryption - it's a simpler scheme.
> 
> The radio module used by MIDIjet Pro uses a "direct sequence spread
> spectrum" radio interface.  DSSS generates and transmits a redundant
> bit pattern for each bit to be transmitted.  So, in addition to
> separating units by frequency (the 31 channels), the units are
> separated by code (they can use different sets of redundant bit
> patterns - sometimes called chipping codes).  
> 
> Each radio module has a unique ID.  As a part of the manufacturing
> process, the receiver and transmitter are "bound" together, such 
that
> the transmitter learns the receiver's ID.  Based on this ID, the 
units
> coordinate with each other and pick a common chipping code.
> 
> Hence, if I go to your concert, and I have my own MIDIjet Pro
> transmitter, I can't send out data to your receiver even if I'm on 
the
> same radio channel.  My transmitter has been bound to a different
> receiver, uses a different chipping code, and your receiver will not
> play back the data.
> 
> Regards,
> Richard Audette
> Classic Organ Works
> http://www.organworks.com/midijet/
> 905-475-1275