| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1333.1 | Just couldn't be the new amp, Daddy's said so... | JAWS::COTE | Is the last peeping frog embarrassed? | Tue Apr 26 1988 17:33 | 9 |
| If the Mirage went dead, I'll bet it's not the cable.
The Mirage wasn't dependent on the cable and should have continued
to play.
Edd
|
| 1333.2 | Additional info... | OILCAN::DIORIO | | Tue Apr 26 1988 17:39 | 23 |
| Oh yeah, almost forgot...
---
My amp has a three way ground switch set up this way | + |
| o |
| - |
---
The "+" and "-" are obvious, but the people at Daddy's
said that the "o" position is a "no ground" position.
The problems stated in .0 occurred when the ground switch was set
to the "-" position. When I switched the ground switch to the "o"
position, the problems never re-occurred.
By the way, the amp sounds great; power- and projection-wise this
thing kicks serious butt. Also I thought the guy did a good job
installing the new components; no obvious hacks--it looks pretty
clean even though he had to cut a bigger hole for the new horn--you
can't even tell (except that the horn is bigger).
I would hate for the problem to be the amp, but if it is, I'd like
to be able to establish that soon, and take advantage of the warranty
period that Daddy's offers on their used stuff.
Mike D
|
| 1333.3 | | AKOV88::EATOND | Where is he when the music stops? | Tue Apr 26 1988 17:48 | 14 |
| I can't tell you much about the amp, but concerning MIDI cords...
The MIDI spec states that pins 4 and 5 are in use and pin 2 is used for
ground. That's all. There's no mention of any other use of any other part of
the DIN plug. I have used MIDI and 5-pin din cords (i.e., those not sold
specifically AS MIDI cords) interchangably and have never had a problem. The
only time I can imagine this to be a problem is if the manufacturer of a
particular synth did something OUTSIDE the limitations of the MIDI spec.
It IS curious, though, why they use a FIVE pin Din plug. Is this,
perhaps for future enhancements to the MIDI spec?
Dan
|
| 1333.4 | I think the AMP might be sick | TYFYS::MOLLER | Vegetation: A way of life | Tue Apr 26 1988 18:21 | 20 |
| Evedently the sheilding can be wrong the the 5 pin DIN connector.
I have a freind who was having all sorts of random occurrances
of notes getting stuck on, that cleared up after he switched to
MIDI specific cables. I've been making my own (I need a bunch that
are 2 feet long or shorter) & I use the 2 conductor sheilded wire
from Radio Shack, and a set of thier 5 pin DIN connectors (I've
even made up some cords with female 5 pin DIN connectors, that allow
me to make quick switches of layouts without having to undo too
much stuff). These have not caused me any problems & are a few bucks
a pop (what good are 10 foot cables when most of my stuff is a
foot away from each other). Also, you can build a MIDI switch (as
described in another note), letting to swap parts in and out (I
use on on my Yamaha MIDI Filer to decide whether the CZ-101 is
sending to the sequencer, or the MIDI Filer is - Nice & quick!).
The sheilding, and the wires being twisted pairs seem to be essential
for proper MIDI use. I think that the problem starts getting more
promenent when you start adding more MIDI devices.
Jens
|
| 1333.5 | Yet another hack approach | ROLL::BEFUMO | Twenty-First Century Schizoid Man | Tue Apr 26 1988 18:22 | 9 |
| Hi again Mike,
I know practically nothing about midi, but if you're looking
for something to do with your Ohmmeter, try checking the continuity
between pin 2 (see previous reply), and the casing. If they are
connected, try disconnecting them, and otherwise, if they are not
connected, try connecting them. Although this is obviously a hack
approach, when dealing with semi-standards, it is often the only
way to go.
jpb
|
| 1333.6 | | PAULJ::HARRIMAN | That's me | Tue Apr 26 1988 20:53 | 18 |
|
re: Dan
Huh. My Atari manual has the pinouts for the MIDI ports on it.
It has all five pins used. Believe it or not, I got both thru and
out on the same connector... Those two "unused" pins... I gotta
check this out.
re: Mike D
I doubt your MIDI network is having the problem, but every doubt
has an indicator also. I have hung my MIDI network by feeding In
to Out all around and trying to play the player when echoing MIDI
in to MIDI out on all the boards. Just did it last night. Cleared
it by breaking the loop. Wreaks havoc on the sequencer (it just
*hung* there)... I'm finding out all sorts of things this way....
/pjh
|
| 1333.7 | It's time for a revolution. | NYMPH::ZACHWIEJA | Only 171 days left | Tue Apr 26 1988 21:44 | 15 |
|
Yes, they are leaving room for enhancements to the MIDI spec, but
I am not sure whether 5-pins is ever going to be enough.
I already run into problems when playing along with sequenced mat-
erial. Things get lost. Notes don't come on, some don't go off.
I need more bandwidth.
I would like to see some sort of coax solution. Mega-bandwidth,
no delays on long thru configurations. MIDI serves its purpose,
but it has become somewhat outdated and can no longer be improved
through mere expansion and enhancements to the spec. It's time
for a revolution.
_sjz
|
| 1333.8 | I don't know what it's good for but... | PAULJ::HARRIMAN | That's me | Wed Apr 27 1988 12:01 | 22 |
|
re: .-1
Sure, if all the manufacturers can agree again on the standard,
and they give us upward compatibility for all our existing MIDI
hardware.
I checked my Atari again last night. Yup, there is a MIDI thru
superimposed on the MIDI out connector. Whatever did they do that
for? Now I'll need to build a box to take advantage of it.
For you Atari owners:
MIDI OUT MIDI IN
1 - Thru TD 1 - NC
2 - Shield Gnd 2 - NC
3 - Thru Loop Ret 3 - NC
4 - Out TD 4 - In RD
5 - Out Loop Ret 5 - In Loop Ret
/pjh
|
| 1333.9 | Warrantee? what warrantee?? | LOLITA::DIORIO | | Wed Apr 27 1988 13:54 | 19 |
| Well, since the general consensus seems to be that the amp is at
fault, I decided to open it up last night and take a peek. When
I got it opened right away I noticed that the guy at Daddy's was
telling the truth about the horn-- it IS an Electro-Voice! I couldn't
get at the 15" speaker to see if it is in fact a JBL, but I'm assuming
if he told me the truth about the horn, then there's a good chance
that there is a JBL in there--besides when I compared it to another
stock KB-300 in the showroom the bottom end on my amp blew the stock
amp away. OK, so I looked at the connector going from the amp section
to the speakers. Looked OK. So I compared it with another connector
near the bridge rectifier and noticed that the other one was a lot
tighter fit because it was closed up more. I got a pair of needle
nose pliers in there to squeeze the speaker connector toogether
more. I'll bet that will fix the problem. Time will tell.
Thanks to you all for your help/opinions/suggestions.
Mike D
|
| 1333.10 | Hardware ignorant, but adventurous | DYO780::SCHAFER | Walk between the lines | Wed Apr 27 1988 14:32 | 8 |
| While we're at it ...
What would the pin config for the extra MIDI box for the ST look like?
I could probably figure it out, but I don't want to think right now.
A simple line diagram would be fine.
-b
|
| 1333.11 | For those with nothing to complain of... | NAC::PICKETT | David - Dept. of Redundancy Dept. | Wed Apr 27 1988 14:52 | 24 |
| This reminds me of a converstion we had a while back. Someone, I
can't remember who, was complaining about the orientation of the
MIDI jacks on his synth. Oh, if my problems were only that small.
Anyway, the problem was that half the synths in the world have pins
down, and the other half have pins up. (This is an approxomation,
as I have heard of a radical fringe which has pins sideways)
This sparked the creative muse at LERDS-BIM, and the concept of
a MIDI jack orientation switcher was proposed. It would consist
of a 1 foot cord with a male jack on one end, which you would plug
into your offending synth, and a female jack on the other end, which
you could rotate to your favorite position, and not have to worry
about whether your jack was pins up or pins down.
In this month's Electronic Musician (May '88) Craig Anderton, who
this reporter hitherto thought was a reasonable person, came up
with the same gripe. Honest, read his editorial on pg 6. His concept
of the MIDI patch bay, proposed later in the editorial, is a good
idea though, and makes up for the pointless complaining in the second
paragraph.
Truly, you cannot please them all.
dp
|
| 1333.12 | Should be easy | PAULJ::HARRIMAN | That's me | Wed Apr 27 1988 15:09 | 35 |
|
re: .-1
Truly. Should have been in the April issue instead.
re: .-2
Sure:
+-----------+
| ____ |
| +---/3 1\+
| | +-|5 4| "ATARI OUT"
| | | \__2_/
| | | |
| | | +-------+
| | | ____ |
| | | /3 1\ |
| | +-|5 4| | "OUT"
| | \__2_/ |
| | +-------+
| +----------+ |
| /3 1\ | |
+-----|5 4|-+ | "THRU"
\__2_/ |
| |
+-------+
I believe this is the correct schematic. At least that assumes that
pin 5 is always the loop return for whatever you are trying to send
or receive.
/pjh
|
| 1333.13 | Missing wire in previous reply | IOENG::JWILLIAMS | Zeitgeist Zoology | Wed Apr 27 1988 15:23 | 6 |
| re -.1:
Also connected is pin 4, atari out to midi out.
Small oversight, great diagram.
John.
|
| 1333.14 | Another application of creative labelling | DREGS::BLICKSTEIN | The height of MIDIocrity | Wed Apr 27 1988 17:34 | 27 |
| Regarding the orientation of the MIDI plug, sure it would be nice if
the standard included that.
But this is another benefit of labelling.
In a recent note I revealed my shocking anal rententive behavior
regarding labelling (all my cords are labelled).
I have also done this with my synths and modules. On my keyboards
I have a strip of tape on the back edge telling me the functions of the
plugs just beneath the strip. This is so I don't have to have to
strain my neck to read the back panel which is where all units put
the plug labels.
Yet another endearing feature of the ESQ-1 is that the plugs are
labelled BOTH on the back panel, and on the top panel near the back.
Anyway, one of the things I put on the label is the orientation of the
MIDI plug.
Oddly enough, this has demonstrated itself to be the most valuable
label because even though I've damn near memorized the layout of the
MIDI plugs (as the result from the "switching" problem that we're
discussing elsewhere), I *STILL* can never remember the orientation
of the MIDI plugs.
db
|
| 1333.15 | Hey, you knew what I meant though | PAULJ::HARRIMAN | That's me | Wed Apr 27 1988 18:58 | 6 |
|
re: .-2 (re: .-3)
oops. Thanks for the feedback.
/pjh
|
| 1333.16 | been there. | JON::ROSS | shiver me timbres.... | Mon May 02 1988 00:56 | 10 |
|
Please refer to my note on midi
ground-loops. I think the title
had some verbage as:
"get a buzz on" or something.
let me check....
ron
|
| 1333.17 | anchors away (sic! sic!) | JON::ROSS | shiver me timbres.... | Mon May 02 1988 01:00 | 8 |
|
Note 776.*
(now, to read the replies to this note and see if
i'm on track....)
rrrrrrokn,rrrrrrrrrrrokn...
|