psarkissian

The bridge is on the right, the spring hooks are on the left.

This is a factory set-up.

I hope you weren't trying to do the surgery yourself.

Go to "Inputs" and check the edit page,

then dial in the selection.

Typical and most common Outputs,... edit page,...

"1/4 inch Output"

"Match Studio/ Direct Mode"

The afore mentioned are a typical generic set-up.

More than likely something got switched in the edit page

and wasn't switch back.

No offense taken.

The problem exists,... we just need to find the right solution.

There is an extraneous vibration somewhere that's getting into

the piezo, and the circuitry is trying to process it with its algorithm.

We just need to find that extraneous vibration, and stop it before it gets to the piezo. 

I'm not lying.

It's just that it gets into details of modeling I'm not allowed to

talk about. You're talking about effects, I'm talking about cause.

It only appears to clean it up. There are things going on in the

software I can't get into. The appearance of cleaning up the signal

is just that, appearances. At some point, somewhere, certain

artifacts and distortions will appear in the E6, A5 signals when you

do the piezo line cross swap.

Sorry, would love to get into the deep stuff of it all with you, but I'm

simply not allowed to go any deeper into the processing than that.

If it were a firmware design failure, everyone would have that problem

including me with my four JTV's.

(oh, and, please don't call me a liar again, it's just plain not cool,

and besides,... I was a Boy Scout, we just don't do that).

"Either both strings produce some mechanical noise, and either

software or electronics is cleaning up on one and not the other"----

No, that's not the reason,... nice guess. Not that kind of software.

Modeling, simply models the specified instrument.

"OR, both mechanical signals are fine, and either software or electronics

are adding the artifacts"----

No, that's not the reason,... nice guess. Not that kind of software.

Modeling, simply models the specified instrument.

If it were something other than Modeling, then the afore mentioned

would be valid,... good ideas though. I probably would have thought

the same too, if it were a processing method other than Modeling.

It simply processes what's coming from the strings.

Have the service center contact Line 6 Customer Support, so we can get a better

evaluate the failure, and advise further if needed.

The fact the the piezos work, shows that the piezos work, or one

would've failed during the swap test.

His electronics including the piezos and circuit board were replaced,

the firmware was re-loaded to the latest. If there's still a problem, then

it must be elsewhere. 

Kwendling, I don't know about your guitar, nor have I seen the repair

record yet. There may be something particular to your case that's different

and/or the same as Miroslav. I'll have to look into yours further.

The bridges are specific for each body style and are not interchangeable

for use with other body styles.

:)

The more, the merrier.

Going into which Bogner, a Bogner/Bogner or a Line 6 Bogner?

Which input of the amp?

As mentioned before, switching connectors on the piezos is a blind alley

that goes nowhere. in some multi-channel device, that might be a useful 

test. But with this device, it's not a useful test except to show that both piezos

work fine. What's going into those piezos signal wise,....

Each piezo routes to a connecting point on the board specific for that string.

Yes,... the piezos, the bridge, the circuit board,... all replaced, and the firmware

was re-loaded to the latest version.

That is the wrong supply to use. there is an XPS made specifically for that.

There is info about that and other things in the Pilot's Handbook (owners manual).

Unfortunately, Modeling is more about modeling other devices,

in this case a guitar. Cleaning up artifacts is something else, or I

would've suggested that long ago.

And if it were the case, then all the JTV's would do that, including

all of mine. So it must be something specific to this individual guitar.

There was a firmware update where the palm muting was adjusted

and a couple other items.

Since the electronics from the piezos on down were replaced, the

firmware was updated and there's still a problem,... then it must be

something else.

All good suggestions though.

Factory string set,... good.

Nut looks okay.

Tuning post retainer nuts look snug.

Breaking angle between the nut and tuning posts, hard to tell, but looks okay from this angle.

Action is good. 

Button ends and winding of the string at the bridge looks snug.

E6 end looks like it's clear of the A5, so I would expect no extraneous vibrations there, might want to keep an eye on it just the same that they don't touch.

The Velcro is a nice addition.

Also, regarding flat picks,... soft tend to thwack on the strings, stiffs tend to ping, mediums are usually pretty good.

I mostly finger-pick myself.

Where does "fall away" occur in regards to neck relief?

Lloyd must be before my time, Michel retired. I'll have to check who else there is to check with.

There's more than kind of clang tone, more than one way to do that. Have to look further at that.

With the bridge and its piezos being replaced and circuit board being replaced,.... must be something else.

If it were a piezo problem, replacing piezos would fix it. If it were firmware, everyone using the firmware and I would have that problem too (with my four) JTV's,... and I don't.

If it were the production series of bridge, I'd see many more of these. Interesting idea though.

Something else is at play here,... just have to find it.

The "clang tone" post would be useful if all the piezos had that problem.

The electronics downstream of the piezo and the piezos (ie- replacing the
the bridge) have been replaced, so that possibility has been eliminated.

If it were a piezo, then replacing the bridge would've fix it, wouldn't it? If it

were this clang tone, all piezos on all guitars that use these piezos (ours or

anyone else's) would exhibit this problem, wouldn't it? So those possibilities

are eliminated.


(from my prior post)
Hmmm,... wave sources,... just out of curiosity, can you do photo of how
the strings are tied off at the tuning posts? Also how the strings are fed thru
the the nut slots. It's rare, but I want to check something. Something I've
come across only a few rare occasions. And remind me again what Brand
and gauge set your string are? What is the action height (in millimeters)
of string E6 at fret-12? ... since we're looking at possibilities, I'd like to cross
these off my list. 

Since the the bridge was replaced and the problem still exists, then it's

upstream from the piezos. Which goes back to my previous list of possible

mechanicals involved,...

In the mechanical aspects,...

-Could be the strings,

-if the butt end is not snug in,

-or not tight at the tuning post,

-breaking angle of the string from the nut to the post,

-the nut slots,

-fret buzz,...

-any mechanical buzz will come out of the electronics as distortion (amplitude

or frequency).

-Pick-up height not set correctly, induces warbling, which induces

a host of other related audio artifacts into the final signal.

-Set up, something may need to be dialed in a smidgen.

Swapping piezo wires takes you down a blind alley that goes nowhere,

beyond checking a couple things that has nothing to do with the source.

It just amplifies it. It's a nice test, but it just shows that it's not the piezo.

If it was the piezo the problem would be gone after the bridge was replaced.

Hmmm,... wave sources,...  just out of curiosity, can you do photo of how

the strings are tied off at the tuning posts? Also how the strings are fed thru

the the nut slots. It's rare, but I want to check something. Something I've

come across only a few rare occasions. And remind me again what Brand

and gauge set your string are? What is the action height (in millimeters)

of string E6 at fret-12?

Class-B pentode is one I use a lot too.

"And yes, I understand this is not a "solution"...it was never offered as such,

but rather as a means of troubleshooting the problem"--- yes, very good. Nice

troubleshooting tool, up to a point.

Still, need to find the source and not the affect. And that's upstream of the piezo,

not downstream. If it were the piezo, the problem would've gone away when the

bridge was replaced.

As for why swapping wires changes things,... that would get into inner processes

I can't talk about, beyond what I've already said on the subject.

Not so crusinon2,.... the piezos go to assigned points to feed signal lines

specific for that string. As I said before,... haven't solved the problem, but

only masked it.

Since the bridge (and the piezos along with) it were replaced, then it's not the

piezos. Since the main circuit board was replaced,... then it's not that either.

The wave is mechanically generated,... the electronics is just making it more

noticeable. Job of Modeling is to Model an instrument, not remove mechanically

generated audio artifacts injected into the signal. For that, the set-up and

other mechanical aspect have to be dealt with.

silverhead,... yeah, at one point I thought that possible too until the bridge (and its

piezos) were replaced. Good call though, on the ball as usual.

Something is getting into the wave before it hits the piezo. And the electronics is

just bringing out more. Need to find the source,... not the affect.

Longitudinal wave,... or any wave for that matter, is produced

mechanically. It holds to the rules of Newtonian mechanics.

Firmware is not the solution, firmware is not mechanical.

If the Model sounds the way it does, it's because the guitar

it's modeled from sounds that way. That what Modeling is.

If firmware was the solution, then everyone would have this

problem on every JTV that is out there.

For more on waves, for those who are curious,... "Physics of Waves"

by Elmore and Heath.

For those curious about Modeling,.... check out Julius Orion Smith III,

CCRMA at Stanford University,... https://ccrma.stanford.edu/~jos/

... he teaches this stuff.

The electronics have been eliminated as a source, because the electronics

have been replaced, therefore something mechanical is left as the source.

In the mechanical aspects,...

Could be the strings, if the butt end is not snug in, or not tight at the tuning post,

breaking angle of the string from the nut to the post, the nut slots, fret buzz,...

any mechanical buzz will come out of the electronics as distortion (amplitude

or frequency). Pick-up height not set correctly, induces warbling, which induces

a host of other related audio artifacts into the final signal.

You'd think after being a Mahavishnu Orch fan for four decades

that I wouldn't miss that one,... thanks.

Master volume, maybe just a smidge. Your settings seem fine.

Class-A Triode would run hotter than a Class-B Triode. And a

Class-B Pentode runs even more efficient.

If you gig regularly, the 12-18 months interval would be about

right for you (unless one goes prematurely). And the power tubes

have to be a matched pair.

Usage will determine how long the tubes last. Gigging musicians should

change them out every 12-18 months, bedroom, living room and weekend

rock stars ought to change them out every 20-24 months.

Over-biasing for more crunch, shortens the tube life. Making like John 

McGlaughlin or Al DiMeola is better for tubes than playing like a dark

master shredder king with the amp turned up to eleven.

I've seen fresh tubes (at other places I've worked) last two weeks in an amp,

or as long as five years (in that same amp).

E6 input needs to go to the E6 piezo or strings 5 and 6 won't process correctly.

Putting E6 piezo in A5's input only masks the problem,... it doesn't solve it.

But other audio artifacts may show up when you do that.

That's why it only appears to work. I can't go into the processor aspects of it.

And BTW,... from what I've heard in the audio clips, your playing is fine.

As I've said before,... mechanical, so it's more than likely the set-up

needs adjusting somewhere.

And yes, the guitar is made of wood, the hardware is made of metal,

so a lot things resonate. So it all gets checked and if needed, adjusted.

One thing I adjust when playing my JTV's, is my technique. Knowing

how sensitive this stuff is, I make certain adjustments as to how I play

the thing. To paraphrase Shakespeare,... to play is the thing, so I play

the JTV thing. Tomorrow, it might be my Gibson.