issue06

EMUSIC-L Digest                                      Volume 54, Issue 06

This issue's topics:
	
	Unplugging MIDI cables (5 messages)

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Date:         Thu, 15 Jul 1993 12:26:52 BST
From:         "Steven D. Bramson" 
Subject:      Unplugging MIDI cables

J R III mentioned unplugging serial cables.

Can you / should you plug and unplug MIDI cables into equipment which is
switched on?

My experience with other equipment is

Apple keyboard/mouse        yes
Apple Local talk net        yes
PC RS 232                   yes
PC thin ethernet            you can unplug a cable from a station as long
                            as you don't break the net
PC parallel centronics      avoid
Mac SCSI                    definitely avoid


On a connected subject, my MIDI setup is

Yamaha Clavinova ----->   PC with MPU 401 clone  -----> Roland Sound Canvas

(the sound canvas audio out is fed to the Clavinova audio in)

I find the MIDI thru default connection may not come up depending on what
order I switch on the kit.  I try to stick to

Yamaha, then Roland, then PC which works



Any comments


Steven Bramson

sdb@jet.uk


sdb@jet.uk

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Date:         Thu, 15 Jul 1993 18:11:00 EDT
From:         John Rossi III 
Subject:      Re: Unplugging MIDI cables

I have yet to find a problem with plugging and unplugging MIDI cables.  Since
the things are connected using optoisolators I would think that any kind of
damage would be very unlikely.  Also, they realized that the
MIDI spec was for musicians (electronic musicians especially) who are very
used to plugging and unplugging things while synthesizers are on.

John

------------------------------
Date:         Thu, 15 Jul 1993 18:34:14 EDT
From:         mbartkow@GWENDU.ENST-BRETAGNE.FR
Subject:      Re: Unplugging MIDI cables

Steven asks:

> Can you / should you plug and unplug MIDI cables into equipment which
> is switched on?

You can not afraid to do it, because MIDI is optocoupled. Until no
message is actually transmitted, there shouldn't be no unexpected
effect too, because the current loop is unactive at idle time (take
care on the 'active sensing')

Maciej

------------------------------
Date:         Thu, 15 Jul 1993 18:32:34 -0600
From:         Mike Bishop 
Subject:      Re: Unplugging MIDI cables

I wouldn't recommend unplugging Mac ADB cables. You run a serious risk
of frying your motherboard. Honest. Modem and printer are OK.

 --------------------------------------------------------------------------
| Michael Bishop       |     "Any technology sufficiently advanced is      |
| mbishop@linfield.edu | indistinguishable from magic."                    |
| Linfield College     |                                                   |
| McMinnville Oregon   |      - Aurthur C Clarke                           |
 --------------------------------------------------------------------------



On Thu, 15 Jul 1993, Steven D. Bramson wrote:

>
> Can you / should you plug and unplug MIDI cables into equipment which is
> switched on?
>
> My experience with other equipment is
>
> Apple keyboard/mouse        yes

------------------------------
Date:         Sat, 17 Jul 1993 23:47:55 +0000
From:         Nick Rothwell 
Subject:      Re: Unplugging MIDI cables

>Apple keyboard/mouse        yes

>Any comments

Yes: doing this you run a risk of blowing a soldered-in fuse on the
keyboard logic board.

                        Nick Rothwell   |   cassiel@cassiel.demon.co.uk
     CASSIEL Contemporary Music/Dance   |   cassiel@cix.compulink.co.uk

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