Crackling Noise On Recording Track

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  • #29237
    Josef HolzerJosef Holzer
    Participant

    Hi All,

    I am currently using a x32 Rack + uTrack card to do live recording, but I get hearable static crackling noise. Sounds like an old venyl disk. When I start all up from scratch I get this even on my Microphone channel, which dissappears after a while on the Mic channel, but stays on the Guitar channel.
    No matter what guitar I use, if I record it with Kemper in between, guitar directly, XLR, Aux – I alway have this Issue.
    Even if I use the uTrack Card with Cubase and Monitor the Input channels, I get this Noise.
    I only get this noise recorded on the channels I record, but if I mute the single channels and listen to just the summarized Stereo Output channels, I don´t hear that noise.

    I am running out of Ideas now !

    Any Tips are welcome.

    Thanks,
    Joe

    #29238
    Laszlo .Laszlo
    Keymaster

    Hi Joe,

    Do you have a chance to try with the standard X-UF, or X-USB card? Are those working correctly?
    The card and the console handles 8 channels groups setting up the routing. Is that noise related on some groups, or happens randomly everywhere?
    How about if you have that noise on one channel then you swap the groups in the routing screen?
    What is the firmware version on your card?

    #29244
    James GardnerJames Gardner
    Participant

    I also have the same issue.
    2 X32 Racks, both with uTrack cards in them running the latest firmware.
    Both record crackling across all channels (running 16Ch in each).
    Also over USB or ethernet the uTrack software will not recognise either card. I can browse to them to do a firmware upgrade without issue but the actual application can not see them..

    Given both systems are doing the exact same thing, I am presuming it is a software/firmware issue.
    The crackling is a major issue as it makes the box unusable.
    Should I roll down to an older firmware ? has this been tested with an X32 Rack ?

    #29416

    Hello!
    same problem here!

    did someone solve this problem to date?

    best
    Thorsten

    #29418
    Laszlo .Laszlo
    Keymaster

    Hi Thorsten,

    Please tell me the firmware version on your device, and also the exact setup/routing.
    Also tell me the USB drive brand and type please.

    #29419

    Hello

    I just found out, that it disappeared with 44,1khz settings instead of 48khz

    here was may post (in german) in a X32 Froum… I will translate it. as soon as possible

    Hallo liebes Forum.

    Ich habe ein paar Fragen, Probleme, etc…
    vielleicht kann der/die Eine oder Andere ja helfen.

    Ich habe mir gerade ein zweites X32 Rack als 2x Synth-Mixer gekauft (ja, wir haben ´ne Menge Synths auf der Bühne)
    – diese Information nur Richtung Benutzerfehler (ich benutze das andere jetzt seit 2 Jahren, und kenne mich, glaube ich, recht gut damit aus.
    – sinnlose Ergänzung für die Thomann Diskussion, ich habe dort jetzt den letzten X32 Rack gekauft – hatte die Firmware 2.5..scheint also dort seit einer gewissen Zeit zu liegen … habe jetzt aber ein Update “drauf-gespielt”

    beim neuen X32 – wieder inkl. UTrack 32

    habe ich übles “Crackle”s auf der Aufnahme.

    die nur verschwinden, wenn ich die Aufnahme auf 44,1khz stelle.

    – Habe es mit beiden UTrack Karten probiert.
    – im ersten X32 funktioniert allerdings 44,1 / und 48khz .- wie gehabt.

    Bei Neuem
    wird im SETUP unter CARD
    X-UF 32in/32out…

    angezeigt
    im alten nicht – der Bereich ist ausschließlich grau

    im neuen Menü unter
    HOME – INPUTS
    steht “Card 1-8”

    im alten Menü
    steht dort
    “[Card 1-8]”

    die Firmeware ist jeweils gleich
    3.07 (ich weiß es gibt 3.08 – aber es läuft mit 3.07 auf dem alten, und darum möchte ich dies nicht kurzfristig ändern)

    und die UTrack Karte ist in der 3865 Version

    – was mache ich falsch?
    – kann mir jemand helfen?
    – ist es einfach verrückt?
    – soll ich es einfach auf 44,1khz lassen und warten – was von alleine kommt – geht auch von alleine wieder – alte Grippe Weisheit, allerdings nicht bei Aufnahmefehlern überprüft.

    Danke im voraus und liebe Grüße
    Thorsten

    #29420
    Josef HolzerJosef Holzer
    Participant

    Update: A friend of mine bought a Behringer x32-Rack-Mixer + the Cymaticaudio – uTrack x32 Card and immediately got the same Problem – “Crackling Noise” after a couple of min. So we took the Card and plugged it into my x32 Producer – Mixer, recorded for 3 hours and found everything OK. My friend played around a bit and switched from 48kHz to 44.1kHz and the crackling Noise was gone.
    Fazit: Currently the Issue only shows up on a Behringer x32-RACK Mixer with uTrack x32 Card running on 48kHz.

    #29421

    Thank you very much,

    Yes, it works with 44,1khz

    Strange thing, that is works with 48kHz at my other X32 Rack, same firmware version

    #29436
    Laszlo .Laszlo
    Keymaster

    [quote=”PicturePalacemusic” post=3709]Thank you very much,

    Yes, it works with 44,1khz

    Strange thing, that is works with 48kHz at my other X32 Rack, same firmware version[/quote]

    ————————————————————————————————————————————-

    [quote=”JoeWoody” post=3708]Update: A friend of mine bought a Behringer x32-Rack-Mixer + the Cymaticaudio – uTrack x32 Card and immediately got the same Problem – “Crackling Noise” after a couple of min. So we took the Card and plugged it into my x32 Producer – Mixer, recorded for 3 hours and found everything OK. My friend played around a bit and switched from 48kHz to 44.1kHz and the crackling Noise was gone.
    Fazit: Currently the Issue only shows up on a Behringer x32-RACK Mixer with uTrack x32 Card running on 48kHz.[/quote]

    Guys please provide me the following details:
    1. Firmware version on the uTrackx-32 and the firmware version on the Behringer console
    2. Do you have that problem on 48kHz only and never happens on 44.1?
    3. Do you able to use with the same setup the standard X-UF or X-USB card on both two sample rate with no problems?

    #29574
    MikeMike
    Participant

    Same problem here, it ruined an entire important rehearsal recording and weeks worth of setup and planning :-/

    Anyway, here’s my setup:

    1. uTrack-X32 firmware 3865, x32-Rack firmware 3.08
    2. Mostly happens on 48 kHz either immediately or after a couple of minutes. It’s mostly audible when the channel signal reaches a certain threshold (above -30dbFS or so). After it starts, it seems to be persistent, even after a console power cycle. Switching the console to 44.1 kHz immediately solves it. Switching back to 48kHz immediately brings back the crackling.
    3. Cannot test the stock card right now, sorry, but I might have the time later this week.

    The effect is the same when recording to USB drive or when using the card as USB interface with a MacBook.

    I captured and uploaded an example of how it sounds, maybe it helps: https://drive.google.com/open?id=1JFsKEn_8g_RwVJXFkpRMstR42yI8VTvE

    Let me know if there’s anything else I can help you with in order to fix this issue.

    #29576
    Laszlo .Laszlo
    Keymaster

    Hi,

    If you change the routing on the console the noise present on the same channel (number) or goes to the another channel where you changed the routing (instrument)?

    #29577
    MikeMike
    Participant

    I just installed the X-USB and can confirm that it works on 48 kHz (and 44.1 kHz) just fine (been running for about 2h straight now).

    The noise on the uTrack was present on all 16 local channels. As you can hear near the end of my sample recording, the noise isn’t constant but “follows” the actual signal’s amplitude. I’m not sure whether or not it was present on the channels coming from my SD-8 on AES50-A. Gonna check this next now.

    #29578
    MikeMike
    Participant

    Ok, the behaviour seems a bit tricky to reproduce, so here’s my “what I did” log:

    – After building the uTrack-x32 back into the x32-Rack again, I immediately connected it to the computer via USB.
    – Turned on the console, it started in 48 kHz and the uTrack sends audio to the computer *without* crackling. It’s doing this for the last hour straight without an issue.

    So only using it as USB interface seems to work fine. The bug has to be triggered, here’s how:

    – With the console still on 48 kHz and the computer still connected, I connected an external USB hard drive (WD Elements). Waited for the light to turn green, and pressed the physical record button on the uTrack-x32. I let it record to the hard drive for about 2 minutes, then stopped the recording by holding the record button a couple of seconds.
    – I disconnected the USB hard drive. The computer, which was still connected that whole time, got audio again — but this time *with* the crackling.

    A couple more observations:

    – Turning the console off and on after this does *not* get rid of the crackling.
    – Switching to 44.1 kHz gets rid of the issue.
    – Switching back to 48 kHz (even after a couple of minutes operating at 44.1kHz) immediately brings back the crackling.
    – Disconnecting the whole console from power, waiting a couple of minutes and turning everything back on again *does* get rid of the crackling.

    I hope that helps. Again: if there’s something else I can help with, just let me know.

    #29582
    ChetanChetan
    Participant

    Hey miguy2k,

    Thanks a lot for the detailed description of the problem. Interestingly enough we were never able to catch this problem until now.

    Laszlo is on vacation, but when he is back, the first thing he would try is to see if he can reproduce this problem with your description.

    #29594
    Josef HolzerJosef Holzer
    Participant

    Update2:
    So I sent my x32-Rack Mixer with the u-Track-x32 plugged into x32-Rack-Mixer for repair to Behringer.
    Got it back after 8 weeks, but nothing changed.
    Repro:
    If I plug in my Kemper Amp (nothing else) with 48kHz, record on the USB stick by pushing the button on the u-track,
    stop recording by pushing the button on the u-Track and listen to the recording I immediately get the crackling noise.
    Switching to 44.1 kHz during recording never shows any Issues. This is 100% reproduceable all times.
    Plugging out this u-Track-X32-Card from my x32-Rack-Mixer and plugging it into my x32-Producer never created any Issues no matter what settings I used.
    Note:
    – If you just use a Microphone it takes around an hour until the crackling noise Shows up
    – If you test this with an acoustic guitar (checked out 3 different models) it´s reproduceable after a couple of min.
    – It´s completely Independent on any other factors (which channel I use, guitar model, loud, quiet, other settings – no matter what)

    So in my eyes this Issue has always been there if you combine u-Track x32 with an x32-Rack Mixer.
    I assume it just didn´t show up so far, as many Sound engineers use the x32-Rack as a Stagebox.

    I really appreciate, that Lazlo will start to try reproducing this issue in order to find the Problem.

    Aside that the u-Track x32 recording card is really relieable with 44.1 kHz on x32-Rack and with no Limits in x32-Producer and I still like it !

    If you need any more details on how to reproduce this, I am glad to answer questions as well.

    Greetings,
    Joe

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