| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1964.1 | | SALSA::MOELLER | Digital/ISO 2386 Compliance Group | Mon Apr 17 1989 16:35 | 7 |
| >The problem, I now have stuck notes, random patch changes while playing,
>and sometimes notes sounding by themselves. Any hints on what to check?
Check your MIDI cabling.. you may have strained/bent/broken/shorted
some strands somewhere.
karl
|
| 1964.2 | Maybe something obvious | TYFYS::MOLLER | Halloween the 13th on Elm Street #7 | Mon Apr 17 1989 16:42 | 8 |
| You are using 'MIDI' cables aren't you?? Not the cheap 6 foot 5 pin
DIN cables that Radio Shack sells. Those that are not 'MIDI' cables and
are not sheilded right may cause all sorts of electrical interferance
with each other (I have witnessed this effect first hand & now I make
all my own sheilded 'MIDI' cables to avoid the type of problem that
you are now, and I have in the past, encountered).
Jens
|
| 1964.3 | (real cables) and (computer?) | NORGE::CHAD | | Mon Apr 17 1989 17:05 | 7 |
| RE: real MIDI cables
Yes, I am uing real MIDI cables. I've been thinking about it and am
going to check my computer. Having been hacked up and taken apart a lot
it probably shouldn't be near any cables it doesn't have to be.
Chad
|
| 1964.4 | Cable Crosstalk? | DRUMS::FEHSKENS | | Tue Apr 18 1989 21:40 | 5 |
| Don't run your MIDI cables together. You are probably getting
crosstalk between cables. Random routing - it looks ugly, but it works.
len.
|
| 1964.5 | Huh? | DYO780::SCHAFER | Brad - back in Ohio. | Tue Apr 18 1989 22:06 | 5 |
| I've run MIDI cables, power cables, line-level cables and brick power
all in the same 2 sq. in. tube for a year now and have never
experienced any crosstalk at all. Is this a bad idea?
-b
|
| 1964.6 | If It Don't Itch, Don't Scratch | DRUMS::FEHSKENS | | Wed Apr 19 1989 15:24 | 14 |
| What's usually strongly discouraged is lacing cables together for
long parallel runs. Physical proximity is not usually a problem
if it's "random", i.e., two cables don't run side by side for any
great distance. I don't know that anybody's actually done any
cable crosstalk studies in this signal environment (the telephone
folks have, and have demonstrated significant crosstalk, especially
with things like the ringing signal).
Like everything else where there's no adequate theoretical foundation,
"whatever works, works". So if you don't have a problem, don't
worry about it.
len.
|
| 1964.7 | Still suspect.... | TYFYS::MOLLER | Halloween the 13th on Elm Street #7 | Wed Apr 19 1989 17:34 | 11 |
| I have a 25 foot MIDI snake (4 MIDI signals with 4 seperate cables) where
there are Male connectors on one end & female connectors in a small
aluminum box on the other (they are color coded). I use this to connect
my MIDI gear (an MX-8 connects to 3 of the cables & a thru box to the
other one) to my keyboard players gear. This cable is held together
with nylon wire tyes & I use this every weekend. My cables are well
sheilded & I've never had a problem with them (It's amazing how cables
seem to propagate when you MIDIfy your gear). I still suspect that
there might be some sheilding problems with the cables.
Jens
|
| 1964.8 | | ANT::JANZEN | T - 500 picoseconds and counting | Thu Apr 20 1989 00:58 | 3 |
| What crosstalk do you expect on shielded cables?
The theory is adequate len, it's called the electrodynamics.
Tom
|
| 1964.9 | Modifying Casio CZ series synths | MIDIOT::POWERS | Bill OGO1-1/R6 - DTN 276-8725 | Tue Sep 17 1991 18:35 | 19 |
|
This note doesn't quite fit here, but I didn't think it worth starting a
new note topic on this, and this is the closesest topic on my questions.
I have a CASIO CZ230s in my setup, and one of the output (phono plug type)
jacks is flakey (ie the sound drops). I want to replace the jacks, but was
wondering if there is anything tricky I should watch out for while I'm taking
the unit apart. Like could all the keys fall out, and I have to play 49 mid
size key pickup with springs so small you need a microscope to see them. :-)
In addition, while I'm in there, I'd like to disable the battery auto
shutoff feature. If the unit is not used (key pressed) or if it receives
no midi information after about 5 minutes, it shuts off. This is annoying.
It even does this if one is using a power adapter, and not batteries. Has
anyone done this to a CASIO before, or is it even possible to disable it?
thanks
Bill Powers
|
| 1964.10 | I remember this... | EZ2GET::STEWART | Balanced on the biggest wave | Tue Sep 17 1991 18:59 | 6 |
|
My old CZ-101 had a switch to defeat the A.P.O. (automatic p*ss off)
feature. I guess Casio "improved" the family by removing this switch,
huh? Maybe a back issue of EM has clues about how to add the switch.
|
| 1964.11 | | RGB::ROST | Spike Lee stunt double | Tue Sep 17 1991 19:00 | 14 |
| The auto shutoff on the CZ-101 is defeatable by a slide switch near the
output jacks. I guess the 230 is missing this? The 230 must use the
same circuit, so it's be possible to defeat it. BUT...I was looking
over this circuit in the 101 and couldn't make heads or tails of it (I
was trying to fix a power suppply problem).
I've had the CZ-101 open and assuming the 230s is similar, it's no big
deal to open it up.
FWIW, Casio will not provide schematics. You have to get them from
Tandy, who has a data retrieval service that Casio contracts to. Bad
news is that the service manuals are on microfiche only!
Brian
|