jimb@teklds.UUCP (James Binkley) (10/06/85)
*** REPLACE THIS LINE WITH YOUR MESSAGE *** Regarding the tx7, I have been working on a patch editor for the tx7 and just got it going (crawling) last night. I do not have a dx7. It is true that it would help with the tx7 to have a dx, but it is not strictly necessary. A computer will do nicely. One can upload the download the tx7, all voices, all functions, edit voice only, edit function only, and change voice params via MIDI. You can also play it via some other synth. You cannot do voice programming with another synth of course. I have a sixtrak which does not have velocity but it serves for keyboard control. Anyway if you are trying to do some computer style programming you might note the following: 1. it does not accept a noteoff message, "noteoff" requires noteon with a velocity of 0. This is common enough. Sequential synths work that way. 2. The yamaha documentation doesn't mention the checksum method. At least I haven't found it. However a dx7 midi tech sheet says '2's complement'. The tx matches. 3. The parameter change command does not effect notes currently on. I.e. noteon voice param change ---> nothing happens noteoff noteon ---> NOW it happens. This seems to basically reflect the "change a setting and dink a key school of patch programming". I understand that the modular tx8xx (power supply + 2-8 modules) does have interactive param changes? Is this right? The sixtrak has interactive param changes although I noted that if you set a value to zero, you can't come back. 4. I noted that issuing a program change MIDI message to the tx results in it dumping it's paired function setting just in case you are a dx7. Since I wasn't a dx7, a program change message is now closely followed by MIDI input reads to clear the function message. I have not yet tried to fathom the wonderful world of "functions/performances". If anyone would care to enlighten me as to why the tx has 64 functions with each "performance" having two choices voice A and voice B please do so? Did I get that right? I do know that the first 32 are for the tx and the next 32 are meant for the dx7 which we all have since the tx is an expander... This would seem to count up to 128 functions in all. The problem is that I don't understand "voice A" and "voice B". Now if I had a dx7 :-) (I wouldn't have bought a tx7 due to cash outlay). Jim Binkley tektronix!dadla!jrb dadla!jrb@tektronix