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Posts posted by MiroslavKloud

  1. ....

    I do notice one thing that is odd to me and seems to suggest that it is not JUST a hardware problem. If I rub my finger along the string, the 6th string is actually the only one where I CAN'T really hear any sort of high-pitched sound acoustically (though that is clearly where the plink is coming from), but the high-pitched sounds coming from the other strings do not seem to come through the electronics at all, as if they were being filtered out on all the other strings. That is, acoustically I hear some high-pitched sounds that I do not hear coming through the wires.

    Well done. Now you're very close to clarify of the mystery.

  2. JTSC777,

    you're right. But this forum is no longer about to solve the problem by Line 6. This is a skeleton in the closet of management of the company. It's about their actual behavior towards a customers.
    LINE 6, you had two good possibilities for to behave:
    1: Solve your problem
    2: Explicate the reasons why this can not be solved and to offer some satisfaction.

    You have chosen the third way: lies and empty promises.

    I have still liked LINE 6 and I have great respect for the work of your engineers.
    But customer support is shameful.
    I believe that the problem will be solved, but not to your credit - the greater will be your ignominy.

    • Upvote 1

  3. Just for clarity - when people have reported swapping piezo inputs around - I have always understood this to mean they have fed the piezo that sits under the low E (6th) strong into the pcb input for string 5, they have then taken the piezo under the A (5th) string and fed that into the pcb input for string 6.  So the LOW E is now being processed within the board as if it was the A string, and the A string is being process within the board as if it was the E string.  In this scenario, the plink that mainfests on the low E string disappears, but instead, the A string develops the plink.  

    This seems to indicate that the software running on the board is somehow able to remove the plink if the E string is processed as if it was an A string by the board.

    The A string processed as an E string then manifests the same plink that was previously on the E string - which implies the software processing the A string as an E string is not removing the plink noise.


    I am sure it is far more complicated than that simple overview - but essentially that is what has been observed and reported.


    So if it is just a mechanical issue on the low E string, then the above test should not be able to remove the plink - the plink should stay apparent on the low E regardless of which pcb input the low E piezo is plugged into.  Furthermore, the A string should not manifest a plink just because its piezo has jut been plugged into the pcb input for the low E.


    That is my understanding of what has been reported.    Hope that clarifies it for everyone.

    Absolutely accurate.  Thank you.

  4. I repeat it again and again and I do not know, how else I able describe it.
    Plink has the mechanical origin. It occurs naturally in all strings, on any guitar, any bass, any piano... Sometimes more, sometimes less - there are many factors which affect it. But very essence is determined by physical laws. For most musical instruments this is not a problem. But piezo pickup is very sensitive to this type of vibration. In fact, the "plink" occur not only on the E6 string but also on A5 string. At the A5 string is it removed in eletronica. The same should happen also on the E6 string, but here it just does not work - ERROR. Some guitars have due to a mechanical reasons only hushed plink on the E6 - these do not have a problem. Otherwise, there is nothing that could save similarly, as it works well on the A5 string.

  5.  That means it is a mechanical problem that exists on some users' guitars and not on others.


    Yes and no. It is a mechanical problem which exists on all guitars and on all strings, but differs in intensity.

    On top of that, we are also comparing several different models of guitar that are also equipped with several different types of bridge. Thus, the cause of the problem cannot possibly be the same on all these guitars. If we were all using the exact same model and all of us had the exact same problem....


     But we have the same problem, the differences are only in the intensity.

    Further, if you listen to the sound that comes out of the string with your ears instead of with a frequency analyzer, it just sounds like a mechanical noise. It sounds like a metallic vibration or scraping. Again, I was a professional guitar tech. This is a sound I am familiar with and it does have a mechanical cause.


    Yes - Longitudinal Wave.

    You can MASK it with firmware, perhaps, but that does not actually fix the problem, which should be the goal.


    But that does fix the problem on the A string.


    I tell again:

    Anyone can do this simple test. For this you need only three things:

    1. An arbitrary guitar

    2. Ball of your finger

    3. Your ears



    The time since 0.40 till 0.52

  6.  ...To answer the question of "Why doesn't the A string do it?" if it hasn't already been answered - well, the A string is less thick, it probably sits in the saddle like it's supposed to. Additionally, it has less mass and does not vibrate as much. There may be a lot of fancy electronics in this guitar, but it is still just a guitar and guitars are not complicated things.

    This is a mistake. The question is not: "Why doesn't the A string do it?" Because the A string also do it. So the question is: "Why the mechanical problem that proven to exist on the A string, doesn't affect on the output signal from the guitar?"


    Maybe my guitar needs a notch filter at 2.1 kHz but yours needs a notch at 2.3 kHz.

    In all the sound samples that I have heard, the problem is on the same frequency.

  7. An earlier anecdotal information from Line6 (from Yamaha):

    "The given problem can be eliminated probably only with software modification.
    But at this moment I have no information about the planned modification of the software."


    Slovak original text (you can use Google Translator):

    Vážený pan Kloud,


    OdpoveÄ zo spoloÄnosti Line 6 dorazila a je vcelku obsiahla.

    Kolega Christian Basener z európskej centrály Line 6 celú vec preveril s kolegami v USA.

    V zaslanom emaily poslal informácie o všetkých aktivitách a postupoch pri riešení daného problému.

    Je presvedÄený, že zo strany spoloÄnosti Line 6 bolo spravené maximum pre spokojnosÅ¥ zákazníka.

    Naozaj, ako ste nakoniec sám uviedol, danú problematiku je možné odstrániť zrejme len úpravou softwaru.

    V tejto chvili ale žiadnu informáciu k planovanému obnoveniu softwaru nemám.

    SpoloÄnosti Yamaha pracuje na zvýšení kvality produktov Line 6.

    V prípade, že bude známa informácia o oprave softwaru, ktorý je inštalovaný vo vašej gitare, budem Vás informovať.

    Ostávam s pozdravom a za porozumenie Äakujem.

    Perhaps the problem is insufficient memory in the guitar - therefore, they perhaps are not able to solve this problem.

  8. canerakcil, I had same problem with my varian long ago. I changed the saddle order, so the "faulty" one went to other string, and on that place I put a "good" one from other string. The effect stayed, just now was on the other string. After few weeks I replaced the bridge (was lucky to buy one really cheap). Problem was gone.


    If there is a L6 service close to you - take your guitar there. If not - you may try to replace the saddles (from E to A and vice versa). Just that will require careful soldering I think. Taking guitar to the service will be best solution.

    My guitar was in the Line 6 service 11 weeks. The bridge and the piezo pickup were exchanged been previously.

  9. Line 6 and Hewlett-Packard. The two companies in California and so different behavior towards customers.

    ... The most recent firmware update included a dynamic security feature that prevented some untested third-party cartridges that use cloned security chips from working, even if they had previously functioned.

    We should have done a better job of communicating about the authentication procedure to customers, and we apologize. Although only a small number of customers have been affected, one customer who has a poor experience is one too many...
    ...As a remedy for the small number of affected customers, we will issue an optional firmware update that will remove the dynamic security feature. We expect the update to be ready within two weeks and will post additional information here as it becomes available...



    Line 6 - OUR STORY

    Inspiring innovation.
    We're musicians. We’re technologists. So, we’re fanatics about engineering innovative, amazing-sounding gear that's ready to go right out of the box. And we're pros who have a track record of designing category-defining products that shatter technical barriers─so you can focus on your music.
    We introduced the world’s first digital modeling amp. We're the ones behind the groundbreaking POD® multi-effect, that revolutionized the industry with an easy way to record guitar with great tone. Our Variax® guitars can do more than any other instrument in history (PLINK?), and we’ve led the wireless analog-to-digital transition for musicians everywhere with our Relay® products....

  10. So leave R1 out. Do I still use C1?


    Not. The input of the operational amplifier must be grounded. If you leave R1 and C1 out, R15 in XT ensures grounding. Input impedance is not changed by adding a second operational amplifier. If you use the R1 and C1, the input impedance will be 500K. This may not be harmful, but I see no reason to do this.

    So no need a capacitor between pin1 (or 7) and the 1k resistor in the return circuit?


    According to me it is not necessary, at the outputs of both operational amplifiers is zero DC voltage. The capacitor can be used, if so, should have at least 2.2 microfarads.

    But certainly it is necessary resistor between pin 1/7 (U18), and 3/6 (master volume).

  11. I have a problem I do not understand exactly how you want to use exactly this. I'm not good in English.

    I had thought of taking the effect send off the junction of R20, R25 and Pin1 of the OPA2134 which seems to be the logical point of patching headphones in.


    If you want to use the signal from the junction of R20 and R25 and bring this signal to the input of external guitar effect - here is the signal 3x stronger than on the guitar input. It may cause unwanted overdriving.

    I was thinking of feeding the returns back in at pins 3 & 6 of the master volume.


    It is not good do feeding an external signal directly to the output of the operational amplifier (U18).

    If you want use the MASTER VOLUME also for external audio, I recommend to interrupt the connection between pin 1 (U18-A) and pin 3 of the master volume and inserted here a resistor - for example 1k and the external signal connect also through 1k resistor. And the same for the second channel. This causes a slight decrease in overall volume, but it will work.

  12. I opened my POD 2.0 again - the circuit is identical with the XT, only here are used a different values of resistors and it does not matter.
    R92 in POD 2.0 = R110 in XT (also R107 and pin 2 on U28-A)
    R94 in POD 2.0 = R109 in XT (R104 and pin 2 on U27-A)


    I recommend the input resistors 20 kohm for gain = 1
    Higher value of the resistors = lower gain.


    Beware of mixing the signal from the XT and from the external effects - here can be a problem with phase shift.


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