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Title: LS9 nightmare
Post by: Ivan Feder on March 03, 2011, 11:26:59 am
Hi all,
thought I would share something that happened on an LS9  last night.
I was doing a corporate show (about 1000 pax). A couple of pairs on the board ( CD's, Beta, powerpoint) and about 10 mono inputs
Everything was fine for most of the day until I had to fade in a paired channel ( CD) as I started to push up one of the faders, the other one (paired one) went flying all the way up to max and the audio came at a horrendous volume!!!!
I quickly muted the channel but the monster was out  :-[
Needless to say that everyone in the room jumped and complained about the super loud sound that came out of the system (12 dV Doscs and 4 dV subs) and  production gave me a look like what the f#@%k have I done.
Now I could not use those channels anymore and I had to repatch the CD payer to other intputs.
I kept the pair muted and everytime I moved the left fader the right one would jump all the to maximum. I finally unlinked the pair and relinked it and the problem went away. Was not able to reproduce the problem after wards.
Anybody run into something like that?
The console is about 1 year old with latest firmware and was in use in normal conditions (temp. humidity, etc)
Title: Re: LS9 nightmare
Post by: Tim McCulloch on March 03, 2011, 11:59:29 am
I suspect there was an offset in fader levels when the channels were paired.  At the bottom of fader travel, a small difference in fader position can be 20dB or so, and almost impossible to see from the knob positioning.  That offset gets built into the link.

I've had the same thing happen on the M7, and when I looked at the numeric fader position in the Selected Channel view, I could see the difference.  Your action of unlinking the channels and re-linking them is the correct thing to do.  After I had this happen, I now only link channels after I've pulled them all the way down and confirm the "minus infinity" position for both channels on screen.

Have fun, good luck.

Tim Mc
Title: Re: LS9 nightmare
Post by: Jonathan Schroeder on March 03, 2011, 12:32:07 pm
After I had this happen, I now only link channels after I've pulled them all the way down and confirm the "minus infinity" position for both channels on screen.

Have fun, good luck.

Tim Mc


I have gotten into the habit of pairing them when they are at 0, so any slight difference in position will not be a 20 db difference. 


You can also temporarily break the pairing on the M7 by holding the select key on a channel and moving the fader (or making any adjustments).  I also run one of the faders the full travel if I can to make sure they follow each other after initially setting up the link.  Usually, if I forget to link it before the show starts I leave them unlinked for the event.


Jon
Title: Re: LS9 nightmare
Post by: Geoff Doane on March 03, 2011, 12:37:18 pm
I've had something similar happen on an LS9 when using paired channels, in this case the input gains for a stereo keyboard became offset, even though they had started off with the same gain.

I have to investigate it further, but I think what happened was that I recalled a scene in which the two channels were not linked, changed only one channel, and then recalled the original scene.  Fortunately, it was only the soundcheck, and I was probably the only one that noticed.

GTD
Title: Re: LS9 nightmare
Post by: Mac Kerr on March 03, 2011, 01:57:11 pm
Everything was fine for most of the day until I had to fade in a paired channel ( CD) as I started to push up one of the faders, the other one (paired one) went flying all the way up to max and the audio came at a horrendous volume!!!!

As others have said, this was almost certainly due to the faders not being at the same level when they were linked. They will move in proportion to the offset, and when paired at or near -infinity the offset can be huge at the top of the fader travel. It is much safer to link the faders in the full up position instead. Linking them at "0" on the fader gives the best resolution, but it is harder to get them both the same.

Mac
Title: Re: LS9 nightmare
Post by: Ivan Feder on March 03, 2011, 02:48:10 pm
As others have said, this was almost certainly due to the faders not being at the same level when they were linked. They will move in proportion to the offset, and when paired at or near -infinity the offset can be huge at the top of the fader travel. It is much safer to link the faders in the full up position instead. Linking them at "0" on the fader gives the best resolution, but it is harder to get them both the same.

Mac

What I didn't make clear in the description of the problem was that this pair had worked perfectly well for at least 10 hours prior to the incident.
I hadn't modified in any way the linking of the 2 channels.
This just suddenly happened!
(I would push up the left fader 1/16 of an  inch (starting at -infinity) and the right fader would jump all the way up (+10) in a split second.
I don't think the problem came from some " offset" since I had been using the pair many times that day.

Title: Re: LS9 nightmare
Post by: Mac Kerr on March 03, 2011, 03:22:56 pm
What I didn't make clear in the description of the problem was that this pair had worked perfectly well for at least 10 hours prior to the incident.
I hadn't modified in any way the linking of the 2 channels.
This just suddenly happened!
(I would push up the left fader 1/16 of an  inch (starting at -infinity) and the right fader would jump all the way up (+10) in a split second.
I don't think the problem came from some " offset" since I had been using the pair many times that day.

Do you have more than one scene? Did anyone else have access during that time? Nothing is impossible in this world, but for the relationship between the 2 channels to change, it seems most likely that there was some other change made that caused it. That relationship might have been broken and remade in a scene change, or buy another user accidentally.

Mac

Mac
Title: Re: LS9 nightmare
Post by: Ivan Feder on March 03, 2011, 03:27:31 pm
Do you have more than one scene? Did anyone else have access during that time? Nothing is impossible in this world, but for the relationship between the 2 channels to change, it seems most likely that there was some other change made that caused it. That relationship might have been broken and remade in a scene change, or buy another user accidentally.

Mac

Mac
Sorry Mac but none of those things happened.
I was the only user and I didn't even make any scene changes.
I know , it stumps me to!
Must be some kind of bug?
Title: Re: LS9 nightmare
Post by: Rob Spence on March 03, 2011, 03:33:57 pm
I have also had this happen. In my case I have 2 pair always assigned to playback and sometimes after powering up the desk I find the flying fader showing up. Unlink-relink does fix it, but I also have been bit by the super loud problem.

I think I will take Mac's suggestion next time I power up the desk and re-link them at max instead of min.
Title: Re: LS9 channel parameters
Post by: Mac Kerr on March 03, 2011, 03:40:18 pm
I have also had this happen. In my case I have 2 pair always assigned to playback and sometimes after powering up the desk I find the flying fader showing up. Unlink-relink does fix it, but I also have been bit by the super loud problem.

I think I will take Mac's suggestion next time I power up the desk and re-link them at max instead of min.

I am not too familiar with the LS9 (and I like it that way), does this fader link also link all the other channel parameters? If it is only a fader link I would avoid it altogether and just push up 2 faders. If it is the only way to link the other parameters like eq, dynamics, and routing, I guess you have to live with it since setting eq and dynamics for each channel separately would be a big PITA. I usually only link faders when they are on different layers. On a DM2000 you link each parameter individually, on a PM5D, all together.

Mac
Title: Re: LS9 channel parameters
Post by: Ivan Feder on March 03, 2011, 03:47:18 pm
I am not too familiar with the LS9 (and I like it that way),  ;D does this fader link also link all the other channel parameters? If it is only a fader link I would avoid it altogether and just push up 2 faders. If it is the only way to link the other parameters like eq, dynamics, and routing, I guess you have to live with it since setting eq and dynamics for each channel separately would be a big PITA. I usually only link faders when they are on different layers. On a DM2000 you link each parameter individually, on a PM5D, all together.

Mac
Yeah, I was coming to that to! The link  parameters can be set individually. Don't think I will be doing much pairing on this console anymore. ;D
Title: Re: LS9 channel parameters
Post by: Mac Kerr on March 03, 2011, 03:50:25 pm
Yeah, I was coming to that to! The link  parameters can be set individually. Don't think I will be doing much pairing on this console anymore. ;D

If they can be set individually, just link the eq and dynamics, and leave the fader separate. You can correct for a channel imbalance on the input that way too.

Mac
Title: Re: LS9 nightmare
Post by: John Neil on March 03, 2011, 03:59:07 pm
Time to calibrate faders...
Title: Re: LS9 channel parameters
Post by: Frederik Rosenkjśr on March 03, 2011, 05:01:28 pm
I am not too familiar with the LS9 (and I like it that way)

Maybe, if you became more familiar with it you'd also like it that way? You can do amazing things on that 20kg console if you try.

(Sorry, but pride in ignorance doesn't sit well with me)
Title: Re: LS9 channel parameters
Post by: Curt Sorensen on March 03, 2011, 05:02:13 pm
If they can be set individually,

Don't the LS9's faders link 'individually' only in regard to parameters but those parameters are then applied globally to all linked faders? A potential gotcha there, if I remember correctly.
Title: Re: LS9 channel parameters
Post by: Mac Kerr on March 03, 2011, 05:33:26 pm
Maybe, if you became more familiar with it you'd also like it that way? You can do amazing things on that 20kg console if you try.

(Sorry, but pride in ignorance doesn't sit well with me)

I use a lot of digital consoles, I have used the LS9 a few time, I have made a decision to avoid it if at all possible. I am someone who has been telling people the amazing things they can do with various digital consoles for many years. I have been using digital console for 10 years since my first time on a PM1D. The fact that you can do amazing things doesn't mean much to me when there are other options that work better for me.

Mac
Title: Re: LS9 channel parameters
Post by: Gustav Hedelund on March 03, 2011, 06:46:43 pm
I think the dec+ and - knobs can do funny things sometimes when working fast, a user error change that sometimes goes by unnoticed if no audio goes by that channel. If the gains are not linked, or dynamics parameters - you may have changed something very wrong on one channel compared to another one, when thinking you were navigating instead of accidentally altering a value.

If one fader moves up a lot faster than the other linked one you may have linked wrong and looked at the wrong fader(s), linked back and then got something wrong with the channel/fader parameters. Maybe one of the channels had been recall safed somewhere in everything? Custom fader layer and jog-wheel change?

Many things can happen, but I find the LS9 to be very,very reliable though strange things can sometimes happen. Most often you find the cause that is yourself, when you don't, I often think I can't think through the whole process of my moving hands and thoughts to find my error, rather than saying it's the console. It's another thing being more than just a one-time occasion in different scenes starting from a zeroed console.

Then again, it could be a bug. Or it could have been you on an analog console turning the wrong gain knob.  Which one is most obvious and which one is most annoying? Leaves a thought.

// Gustav

Title: Re: LS9 nightmare
Post by: Kevin Maxwell on March 03, 2011, 07:01:18 pm
I donít like linking pairs of faders in general on a digital console because I always grab both faders and it seems that the motors fight each other when I am touching both. It feels like something is wrong they donít move smoothly. 
Title: Re: LS9 nightmare
Post by: Rob Spence on March 04, 2011, 12:50:54 am
I am not too familiar with the LS9 (and I like it that way), does this fader link also link all the other channel parameters? If it is only a fader link I would avoid it altogether and just push up 2 faders. If it is the only way to link the other parameters like eq, dynamics, and routing, I guess you have to live with it since setting eq and dynamics for each channel separately would be a big PITA. I usually only link faders when they are on different layers. On a DM2000 you link each parameter individually, on a PM5D, all together.

Mac
The reason I link them is that then I only have to copy one fader to the custom fader layer. First time I ran in to the flying fader problem was when I nudged up the playback and one side of the house got real loud.
Perhaps a combo of linking at max and calibrating the faders is in order for me.
Title: Re: LS9 nightmare
Post by: Minka Matikainen on March 04, 2011, 02:53:47 am
First time I ran in to the flying fader problem was when I nudged up the playback and one side of the house got real loud.

I had those flying faders in past, with 01V96... Sometimes when air got dry (I mean really dry as it can be here in Finland sometimes during winter) the static electricity caused ALL the 01V96's faders to go all the way up, when I touched the console.

I learned to touch something else before touching the console for getting rid of the static electricity.

This has never happened to me on any other console, and I finally got over the habit of touching something else before the console...

I don't know for sure, but for me this sounds like the console has something wrong it it's fader motors... I've been using LS9 (I don't like the console either, but it just keeps on coming to me...) a LOT and I have never had that, not even when my offset has been off...

fwiw,
-Minka-
Title: Re: LS9 nightmare
Post by: Simon Ryder on March 04, 2011, 09:19:04 am
Hi all,
thought I would share something that happened on an LS9  last night.
I was doing a corporate show (about 1000 pax). A couple of pairs on the board ( CD's, Beta, powerpoint) and about 10 mono inputs
Everything was fine for most of the day until I had to fade in a paired channel ( CD) as I started to push up one of the faders, the other one (paired one) went flying all the way up to max and the audio came at a horrendous volume!!!!
I quickly muted the channel but the monster was out  :-[
Needless to say that everyone in the room jumped and complained about the super loud sound that came out of the system (12 dV Doscs and 4 dV subs) and  production gave me a look like what the f#@%k have I done.
Now I could not use those channels anymore and I had to repatch the CD payer to other intputs.
I kept the pair muted and everytime I moved the left fader the right one would jump all the to maximum. I finally unlinked the pair and relinked it and the problem went away. Was not able to reproduce the problem after wards.
Anybody run into something like that?
The console is about 1 year old with latest firmware and was in use in normal conditions (temp. humidity, etc)

I too have had this happen. My personal belief is that it may matter which channel you link from and to. I think it may have occured when I linked from even to odd. Either way, this is something that Yamaha need to fix ASAP.
Title: Re: LS9 nightmare
Post by: Simon Ryder on March 04, 2011, 05:46:12 pm
I too have had this happen. My personal belief is that it may matter which channel you link from and to. I think it may have occured when I linked from even to odd. Either way, this is something that Yamaha need to fix ASAP.

OK, I tried it tonight. If the faders are at differing positions ie. not at -infinity then this fader shooting up error will occur on the current LS9 software.

Make sure that the faders are both completely down before you pair.

I think we should get ?Yamaha to fix this in their next firmware update.
Title: Re: LS9 nightmare
Post by: Chris Hindle on March 05, 2011, 05:32:17 am
OK, I tried it tonight. If the faders are at differing positions ie. not at -infinity then this fader shooting up error will occur on the current LS9 software.

Make sure that the faders are both completely down before you pair.
I don't own one, but from reading this thread, I would suggest doing the pairing with the faders @ 100%. Level matching error would be minimized.
Title: Re: LS9 nightmare
Post by: Simon Ryder on March 05, 2011, 09:03:40 am
I don't own one, but from reading this thread, I would suggest doing the pairing with the faders @ 100%. Level matching error would be minimized.

Basically, the pairing works if the faders are at EXACTLY the same position. The only 2 places this will work is with both either at the top or the bottom of the fader track.
Title: Re: LS9 nightmare
Post by: Mac Kerr on March 05, 2011, 10:41:35 am
Basically, the pairing works if the faders are at EXACTLY the same position. The only 2 places this will work is with both either at the top or the bottom of the fader track.

However, at the bottom of the the track even an extremely small difference will translate to a large difference at the top of the track, a small difference at the top will translate to no difference at the bottom.

Mac
Title: Re: LS9 nightmare
Post by: Brad Harris on March 06, 2011, 11:31:09 am
I'll spill my beans against this ......

Its not a bug, error, or 'Oops, we forgot to do ......' Its a FEATURE. Check out page 124-125 of your user manual to read more about what this really does for the console and how to use it. This is the only thing I miss about the 01v96 in regards to fader linking that isn't on the newer consoles ..... and here's why

There's no DCA on the LS9 ... but you can fake it with a fader link, where you don't necessarily want the faders at the same level.
 
But when you do a fader link, as said, be sure to group them when they are at the same level in regards to eachother (this can be verified on the screen) if you want them to match eachother.

Also as mentioned (and in the manual), as with the 01v96, hold select while changing one of the faders if you need to change the offset between levels in the fader link.


I think we should get ?Yamaha to fix this in their next firmware update.
Title: Re: LS9 nightmare
Post by: Ivan Feder on March 06, 2011, 11:58:10 am
I'll spill my beans against this ......

Its not a bug, error, or 'Oops, we forgot to do ......' Its a FEATURE. Check out page 124-125 of your user manual to read more about what this really does for the console and how to use it. This is the only thing I miss about the 01v96 in regards to fader linking that isn't on the newer consoles ..... and here's why

There's no DCA on the LS9 ... but you can fake it with a fader link, where you don't necessarily want the faders at the same level.
 
But when you do a fader link, as said, be sure to group them when they are at the same level in regards to eachother (this can be verified on the screen) if you want them to match eachother.

Also as mentioned (and in the manual), as with the 01v96, hold select while changing one of the faders if you need to change the offset between levels in the fader link.
Hey Brad,
don't want to repeat myself but like I said previously, the problem occurred after hours of none problem, and no I didn't change scenes or hit some button that I wasn't aware of.
I use the LS9 frequently and I am Yamaha savvy ( I've been using Yamaha consoles for over 10 years)
There is no way you can pair a channel, move up from -infinity the left fader and see the right one jump all the way up in an instant! If you can achieve that in any way I'll be glad to learn!
Title: Re: LS9 nightmare
Post by: Tim McCulloch on March 06, 2011, 01:58:55 pm
Hey Brad,
don't want to repeat myself but like I said previously, the problem occurred after hours of none problem, and no I didn't change scenes or hit some button that I wasn't aware of.
I use the LS9 frequently and I am Yamaha savvy ( I've been using Yamaha consoles for over 10 years)
There is no way you can pair a channel, move up from -infinity the left fader and see the right one jump all the way up in an instant! If you can achieve that in any way I'll be glad to learn!

Hi Ivan-

Have you run a fader calibration recently?  I suspect you have a bad fader in that pair if you had no saved offset.

If this were an actual software bug I think we'd have many reports of this behavior.

Have fun, good luck.

Tim Mc
Title: Re: LS9 nightmare
Post by: Ivan Feder on March 07, 2011, 09:42:26 am
Hi Ivan-

Have you run a fader calibration recently?  I suspect you have a bad fader in that pair if you had no saved offset.

If this were an actual software bug I think we'd have many reports of this behavior.

Have fun, good luck.

Tim Mc
Hi Tim,
It seems that there are a few other instances of buggy pairs on the LS9.  ::)
However I haven't been able to reproduce the incident so running a fader calibration procedure will only (possibly?) prevent this from happening again? Why it appears to me to be a bug is the fact that the incident happened after hours of normal usage.......
Title: Re: LS9 nightmare
Post by: Brian Ehlers on March 07, 2011, 01:14:27 pm
Everyone seems to be looking for a reason for the weird behavior.  I suspect there is no reason.  Just a random error:   a flipped bit in memory .... data read wrong by the processor due to some nearby RFI .... karma catching up with you for pulling your sister's pigtails when you were 9 .... who knows?  Computers make mistakes, and digital consoles are computers.  Do the processors inside the LS9 use error detection and correction?  Do they even use simple parity to detect data errors?  Does the software perform reasonableness checks on its calculations before acting on them?  These are the kind of things that differentiate a $50 DVD player from a $50,000 piece of avionics.  Where does the LS9 fall on that scale?
Title: Re: LS9 nightmare
Post by: Gareth Hunt on March 07, 2011, 04:11:34 pm
I donít like linking pairs of faders in general on a digital console because I always grab both faders and it seems that the motors fight each other when I am touching both. It feels like something is wrong they donít move smoothly.

That irritates me as well.
Title: Re: LS9 nightmare
Post by: Christian Tepfer on March 07, 2011, 04:53:43 pm
That irritates me as well.
Yeah, but don't we link faders / channels just to leave one fader off the layer and have only one fader controlling the stereo channel?

At least I do so.
Title: Re: LS9 nightmare
Post by: Christian Tepfer on March 07, 2011, 05:01:26 pm
Basically, the pairing works if the faders are at EXACTLY the same position. The only 2 places this will work is with both either at the top or the bottom of the fader track.
I avoid pairing in the bottom position as I never know about possible calibration errors.
Title: Re: LS9 nightmare
Post by: Jonathan Schroeder on March 08, 2011, 02:00:47 pm
I was curious about a few of the circumstances raised in this thread, so I went and fired our M7 up to try a few things. 


I know this doesn't relate to the OP since scenes were not changed, but just for kicks I tried it anyway.


Senario: You have two scenes, one with 2 faders linked, and one without. With the faders recall safed, when you go from the unlinked scene to the linked scene, the fader offset is preserved, so if one is all the way closed, and the other is not, it will maintain the offset when the scene is called.  Makes sense I guess, but whenever you are running recall safe and linking, you need to be aware of this. 


The other thing I checked could have happened is much simpler.


Senario: As you are fading out the CD, you select the channel. You break the link until you let go of the button, so if you select the channel as you are fading it out near the bottom of the fader, it will create an offset.  Even with a brief break in the linking you could have a 30+ db offset. The next time you fade it in, you get the flying faders.  I assumed there was some forgiveness when you select the channel before it breaks the link (maybe if it wasn't already selected) but that is not the case. 


Again, this may or may not be the case for the OP, but it raised some questions in my mind if I want to use fader link on our M7.  I can see it's usefulness when you have layers, but for the M7 it may not be necessary.


Jon
Title: Re: LS9 nightmare
Post by: Dave Neale on April 12, 2011, 12:51:49 pm
Hi all,
thought I would share something that happened on an LS9  last night.
I was doing a corporate show (about 1000 pax). A couple of pairs on the board ( CD's, Beta, powerpoint) and about 10 mono inputs
Everything was fine for most of the day until I had to fade in a paired channel ( CD) as I started to push up one of the faders, the other one (paired one) went flying all the way up to max and the audio came at a horrendous volume!!!!
I quickly muted the channel but the monster was out  :-[
Needless to say that everyone in the room jumped and complained about the super loud sound that came out of the system (12 dV Doscs and 4 dV subs) and  production gave me a look like what the f#@%k have I done.
Now I could not use those channels anymore and I had to repatch the CD payer to other intputs.
I kept the pair muted and everytime I moved the left fader the right one would jump all the to maximum. I finally unlinked the pair and relinked it and the problem went away. Was not able to reproduce the problem after wards.
Anybody run into something like that?
The console is about 1 year old with latest firmware and was in use in normal conditions (temp. humidity, etc)

Were you using the CentraLogic faders to do the fader move?  There is an M7CL48 in one of the houses I mix.  This console has this issue on the #9 input.  I "discovered" the issue while mixing a name artist, during the encore.  I pushed a vocal up a hair past unity on the CentraLogic fader and off it went, producing a really lovely peal of feedback.  Using the fader in the 9-16 fader bank worked normally after I recovered.

A call to Yamaha resulted in being told that this is a known issue, necessitating the 9-16 fader bank being swapped out, even though it is the CentraLogic fader that triggers the fault. The CentraLogic faders work normally on all other inputs on the desk.

Since having the experience I never touch the CetraLogic faders for input mixing on any M7CL I mix on.
Title: Re: LS9 nightmare
Post by: Douglas R. Allen on April 13, 2011, 08:27:48 pm
Not sure if this causes the problems but I noticed this 8 years ago on my 01v96.
Take 4 faders as an example.
Put 4 faders in a fader group.
Fader 1 at neg 10.
Fader 2 at 0 db.
Fader 3 at neg 10
Fader 4 at 0 db.
Move them around to be sure they are in the group and working correctly.
Bring all faders to full off or all the way down. Power down the board then reboot.
All 4 faders will now be in line. All 4 will now be in a row not the 10dbs apart you set them at.
If you power the desk off with them in their respected -10 , 0 db spot then power down , up they will remain the same
 -10,0db.
Now with 3 faders are in a group.
Channels 1,2 at 0db.
Channel 3 at - 50.
If you turn down 3 almost but not quite all the way 1,2 will show almost off as well. But cycle the board and just touch channel 3 and 1,2 will go full scale.

Bottom line. Don't bring grouped faders all the way down when you cycle the desk. (At least with an 01v96) as they will reset to flat line. If you have 1 channel even the slightest up it will peg the other faders.

I always leave my faders up when I turn the desk off when I have faders in a group. The relationship of the group will be maintained.

Douglas R. Allen
Title: Re: LS9 nightmare
Post by: Tim Lovell on April 17, 2011, 01:15:51 pm
Hi all,
thought I would share something that happened on an LS9  last night.
I was doing a corporate show (about 1000 pax). A couple of pairs on the board ( CD's, Beta, powerpoint) and about 10 mono inputs
Everything was fine for most of the day until I had to fade in a paired channel ( CD) as I started to push up one of the faders, the other one (paired one) went flying all the way up to max and the audio came at a horrendous volume!!!!
I quickly muted the channel but the monster was out  :-[
Needless to say that everyone in the room jumped and complained about the super loud sound that came out of the system (12 dV Doscs and 4 dV subs) and  production gave me a look like what the f#@%k have I done.
Now I could not use those channels anymore and I had to repatch the CD payer to other intputs.
I kept the pair muted and everytime I moved the left fader the right one would jump all the to maximum. I finally unlinked the pair and relinked it and the problem went away. Was not able to reproduce the problem after wards.
Anybody run into something like that?
The console is about 1 year old with latest firmware and was in use in normal conditions (temp. humidity, etc)


Hi Ivan,

I've been on an LS9 for about 3/4 years and unfortunately I haven't come across this problem. I have seen the fader calibration issues and the fader offset issue that people have described, but this sounds different.

I would suggest this is as much mechanical as it is a software glitch. I could see a scenario where dust or a foreign object has fallen into the fader and this has screwed up the fader alignment to the point you have experienced. The muted test you performed may have cleared the physical issue, but the software misalignment has remained. The relink process you performed later has realigned the fader pairing and the issue is fixed but is not recreatable.
For example, I frequently get issues where an optical mouse pointer movement is corrupted by a single human hair or dust particle in the path of the laser. When this happens the pointer jumps to a completely random extremity or position on the screen.

A calibration of all faders and a comprehensive clean and service of the board is all I can really suggest as a best effort to reduce the reoccurance of the problem.

In any case I hope you get to the bottom of it.

Regards,
Tim
Title: Re: LS9 nightmare
Post by: Adam Ellsworth on April 18, 2011, 04:28:51 pm
I've become rather intimate with the LS9 group functions on a data structure level and without loading a scene, or bumping a fader while holding SEL, I'm really skeptical the offsets would be affected.

BUT - imagine this: A dirty fader (which you wouldn't "hear" like in analog world) could be wiggling ever so slightly between the two bottom digital values while parked in the -oo range. If you simply pressed SEL at the same instant one TRANSITIONED between -oo and -137db... then it would reset the relative fader levels and you would get exactly what you describe.

I'm not sure you'd be able to duplicate this, but it'd be worth taking a few minutes to try parking the faders and see if you can find a spot where the values on-screen oscillate.