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Conference napalm::commusic_v1

Title:* * Computer Music, MIDI, and Related Topics * *
Notice:Conference has been write-locked. Use new version.
Moderator:DYPSS1::SCHAFER
Created:Thu Feb 20 1986
Last Modified:Mon Aug 29 1994
Last Successful Update:Fri Jun 06 1997
Number of topics:2852
Total number of notes:33157

1195.0. "Alesis MIDIverb II Effects (FX) Jumps Patches" by MORRIS::JACQUES () Tue Feb 09 1988 13:20

                                                           
    
    	I have owned an Alesis MidiVerbII since June. So far I have not
    used the midi capabilities at all, just manually changing patches.
    A few months after I bought it, it started jumping patches on me.
    I returned it to the store where I purchased it. They sent it out
    and had it repaired. Since I live in Worcester and bought the unit
    in Manchester N.H. 2 trips to the store seemed like more hassle
    than the $75.oo savings was worth. Lately, I have noticed the unit
    trying to change patches on me again. It may have to go back to
    the store again.
    
    	A have a couple of questions for you midi wizzards out there,
    and to anyone reading this that owns an MVII. Has anyone else had
    problems with a MVII jumping patches on them ? Just for the heck
    of it, would it help if I strap the midi output to the midi input
    with a short midi cable ? According to the store clerk, he thought
    the unit had a bad PROM. If this is true, what can I do to avoid
    having this happening? Could it sensitive to Static electicity ?
    
    	Any feedback would be appreciated !!!!!
    
    Thanks,
    Mark Jacques
    
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1195.1no way, joseJON::ROSSwe is wockin'....Tue Feb 09 1988 13:3017
    
    could be lotsa things....you have NO cords in midi?
    WHEN does this 'jump'? Youre playing? youre staring
    at the unit? when? AND to what? just up a patch? random?
    
    Cords wraping in midi is a band aid. You have some
    sort of defect IF you can prove you arent sending
    it program change messages.
    
    Mines been fine for 2 months or so....
    
    Id put my money on the connection to the front panel,
    and/or the switch itself. Could also be noise, or a
    semi-bogus supply pack.....
    
    ron
    
1195.2ECADSR::SHERMANNo, Rodney. That's *old* science! ...Tue Feb 09 1988 14:274
    I have had no such problems with mine.  Then again, I use the MIDI
    on it all the time.
    
    Steve
1195.3GhostsCOUGAR::JACQUESTue Feb 09 1988 16:4933
    Re. .1 I have no cords hooked into midi at all. Since I am not
    using Midi, I have nothing assigned to any of the midi patch
    locations, except that I have the unit set up to go to program
    00 when it powers up.
    
    When I originally started having problems I was using program
    91 (love that multi tapped pan effect) and with a fairly steady
    signal going to the Midiverb (the green led on steadily but not
    the red overdrive indicator) the unit would jump to several other
    program numbers like 91-80-55-18-00 (randomly) then stop, I doubt
    if there was any repeatability to how it was jumping, and to my 
    knowledge these programs were not assigned to midi patch locations. 
    The guy at the store (Ted Herbert's Music Mart) said he would bet 
    that it was a bad EPROM. 
                             
    Lately, I have been experimenting with this new GK preamp I just
    bought. I have been turning on everthing in the rack, but not really
    using the MidiVerb, just staring at it so to speak, and have noticed
    a few times that it will try to jump from program 00 (defeat) to
    where a single 5 will flash for a second and then the unit returns
    to 00. Maybe my eyes are playing tricks on me. Either that or maybe
    the unit is haunted. Maybe it's a conpiracy!!!
    
    I am not sure if I have a real problem yet, but I just thought that
    strapping the input and output together might help to keep it stable
    especially if it is getting bogus patch signals out of the air. I
    would rather spend $5.oo for a midi cord than to send this baby
    back for repairs again.
    
    Mark J.
                 
    
1195.4Speculative trouble shooting while U wait, and wait..MENTOR::REGFunction->Function_al->Functional_ity->Functionality_ableTue Feb 09 1988 17:0811
    
    	Duh, I hesitate to venture a guess, BUTT !
    
    	You say that you have nothing hooked up to its midi connections,
    so I was just kinda wonderin' if that could be your problem, i.e.
    an open input lookin' just like an antenna.

    	Reg	{Not that I know what's expected to happen with MIDI
    open inputs, I don't need to cos I won't buy it if I'm not gonna
    hook it up real soon}
    
1195.5Mine goes "Phhtt" every once in a while...JAWS::COTEBehind the keyhole, with my fisheyeTue Feb 09 1988 17:1413
    It seems to me that strapping your OUT to your IN would be likely
    to *increase* any weirdisms. 
    
    As the unit sits now, if you have any noise that could be mistaken
    for MIDI data appearing at the OUT port, it simply goes out the
    OUT port and falls on the floor where the cat will kill it. But,
    if you were to route this back to the IN port, the machine would
    respond to it.
    
    Right now, it seems that your problem is all internal. Adding the
    cable would give the bogus datums a second route to travel.
    
    Edd
1195.6ECADSR::SHERMANNo, Rodney. That's *old* science! ...Tue Feb 09 1988 17:1812
    Theoretically, the opto-isolator shouldn't be able to light without
    juice going to it.  (Have you ever seen an LED just light up with
    nothing hooked to it?)  Not that it couldn't happen.  In fact, I
    could probably get an LED to light given a dry room and a little
    shuffling.  My guess is that if it ain't the PROM it's noisy power.
    Could be a bad power pack.  Could be a noisy AC line.  Could be
    dirty/shorting buttons as has been previously mentioned.  Could
    be any number of bad parts in the internals.  Going for the easy
    stuff, I'd try a new power pack or try plugging in the unit somewhere
    else and see if the problem can be duplicated.
    
    Steve
1195.7It's Cellular MIDI RFI From the Soviet Embassy!DRUMS::FEHSKENSTue Feb 09 1988 18:1313
    re several previous replies:
    
    Hasn't anybody got the nerve to tell him point blank it's broken?
    
    A "floating" MIDI input's not the problem.  Otherwise synths would
    start playing by themselves.
    
    I doubt you've got a bad PROM (E, senior or otherwise).  It's some
    kind of intermittent, I'd guess.  Does it seem to be sensitive to
    vibration?
    
    len.
    
1195.8Don't gimme no static....OILCAN::DIORIOTue Feb 09 1988 19:217
    Static electricity has been known to do strange things to electronic
    gear. Mark, are you using the unit in a room with a rug in it? Being
    winter and all I wouldn't rule it out. Static charges in the kV
    range are not uncommon. 
    
    
    Mike 
1195.9what *are* the odds?JON::ROSSwe is wockin'....Tue Feb 09 1988 19:5316
    The power supply.
    The switch.
    The connection to it.
    Some other problem but NOT pulling flashes of light out
    of thin air that happen to flash on and off at 31Kbaud
    with 2 bytes (or is it 3?) of 10 bit patterns (1 start
    bit one stop bit) and the first byte of which is 0C0 hex.
    
    You should be so lucky at megabucks.
    
    MAYBE fetching instructions from Rom, but probably not,
    because the unit would (statisticaly) do other odd things
    too.
    
    STEP ONE: Try another supply!
    
1195.10DFLAT::DICKSONNetwork Design toolsTue Feb 09 1988 19:5812
Also try another MIDIverb.  Borrow one from somebody and install it in
place of yours, in the same rack if it is in a rack, same power supply,
etc.

If it works, then yours is BROKEN.  Make them REPLACE (not fix) it.
(assuming it is under warranty and you sent in the card...)

If it fails the same way yours does, the problem is in your room.
Could be the power supply, could be something else.  (Later take
the borrowed machine back where it belongs and make sure it still
works after being in your possibly damaging environment (unlikely
to break something, but possible).
1195.11MV-II, I love itSQM::VINSELshe took my bowling ball tooWed Feb 10 1988 12:0619
    I know that this isn't a general MV-II note, but it's the most recent
    MV-II related note.
    
    I finally got a chance last night to play with my MV-II. I decided
    to go back and remix some tapes of live music. I recorded everything
    dry (4 tracks: live mike, PA mix, Guitar, Bass) and had in the past
    just used a cheapo digital delay stomp box during the final mix.
    I know what you're thinking... but I always try to make do with
    the equipment I have. Well I guess I don't have to tell you but
    the MV-II made an absolutely incredible difference. One of the problems
    that I've always had making live recordings is that it is nearly
    impossible to get a mix that can capture the 'live' feeling. I think
    the MV-II has let me do that with great ease. Now I just wish I
    could get the free time to remix all of my tape collection. But
    now that I think of it, maybe I should spend more time making new
    recording...
    
    pcv
    
1195.124TRACK::LAQUERREWed Feb 10 1988 14:2816
    Move on to new material.  I've gone through that process myself when I
    get a new piece of equipment--should I work on new material or should
    I go back and redo some older stuff?  After thinking about it a long
    time, I've decided it's always best to move on and write new material.
    
    Especially with the fact that most of us don't have a lot of spare
    time to dedicate to music, I think it's important to keep moving
    ahead and not over-analyze the past work you've done.
    
    By the way, the discussion in this note has me thinking a midiverb may
    be the next piece of equipment on my list...we always have to
    be thinking ahead, right? 
    
    Peter
    
1195.13Ah second tha motion ...ECADSR::SHERMANNo, Rodney. That's *old* science! ...Wed Feb 10 1988 16:1411
    I agree with Peter.  MOST of my stuff I feel like doing over.  What
    I tell myself is to wait until DAT comes along or until I have some
    real reason for doing things over (like a recording contract? har,
    har, har!).  Anyway, ya has ta ask yourself why you're doing it.
    For most, it's for the pleasure of expression, which is maximized
    when you work on something new.  Um, to keep in line with the topic,
    I'm glad you got an MVII to play with.  Nice beast.  Hope the one
    in repairs got fixed ... (note how *smoothly* I glided back onto
    the topic?)
    
    Steve