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@... for the details. Kind regards, Pete No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5645 / Virus Database: 4284/9110 - Release Date: 02/14/15
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RE: [CZsynth] VZ Editor
2015-03-05 by Mark Steven McLeod