Casio CZ/ VZ/ FZ - Pro Series

Thanks for that info - it is basically the same "twos complement of 7 bit sum" but it is as well to know when to apply it.


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On Thu, 5/3/15, 'Mark Steven McLeod' mark@....uk [CZsynth] <CZsynth@yahoogroups.com> wrote:

 Subject: RE: [CZsynth] VZ Editor
 To: CZsynth@yahoogroups.com
 Date: Thursday, 5 March, 2015, 21:41
 
 
  
 
 
 
   
 
 
     
       
       
       
 
 
 
 
 
 
 
 Found
 this on the old Easy VeeZee archive: 
 
 
   
 
 Hope
 it helps! 
 
 
   
 
 
   
 
 “There
 is a checksum on the end of every
 block of voice patch data (336 bytes) and on the end of
 every block of Op patch
 data (100 bytes). 
 
 
   
 
 To
 get the checksum, add up every byte in
 that block, take the last seven bits (ie MOD 128) then
 subtract the answer from
 128 to get your final checksum value. 
 
 
   
 
 Don't
 forget that all data bytes, and the
 checksum, are transmitted as two four bit nibbles and that
 the HIGH order data
 is transmitted first and NOT the Low order data as mentioned
 in the SysEx
 manual page 8 (Gotcha!)” 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 From:
 CZsynth@yahoogroups.com [mailto:CZsynth@yahoogroups.com] 
 
 Sent: 13
 February 2015 22:14
 
 To:
 CZsynth@yahoogroups.com
 
 Subject:
 [CZsynth] VZ Editor 
 
 
 
 
   
 
  
  
 
 
 
 
 
 
 
 
 
 Hi All, 
 
    
 
 more than
 a year ago I asked for advice on the sysex format (checksum)
 because I wanted
 to create an editor for the monster. 
 
    
 
 The year
 has passed, and after a long break I took up the project
 again. Now I would
 like to ask the group, if there are interested parties, who
 would like to help
 me by providing feedback on the prototype.
 
 
    
 
 It is a
 browser based graphical editor for the VZ and HS-2 developed
 for the chrome
 browser. Right now tone editing is
 implemented. 
 
    
 
 ·        
 Only a screen resolution of 1280 * 800 is
 supported so
 far, so I'd appreciate your feedback on your screen
 resolution. 
 
    
 
 The The ‘jazz-plugin’ needs to
 be installed from http://jazz-soft.net/ and
 needs to be activated in your browser. 
 
 (it is
 necessary for the low level midi support) 
 
    
 
 Everyone
 who is interested maycontact me via vz@cain-project.com for
 the details. 
 
    
 
 Kind
 regards, 
 
    
 
 Pete 
 
 
 
 
 
 
 
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