Stereo Matrix trouble

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This topic contains 4 replies, has 4 voices, and was last updated by Profile photo of RayS RayS 8 years, 3 months ago.

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  • #23639
    Profile photo of Pitk
    Pitk
    Participant

    Pretty strange trouble:

    Tried to use Stereo matrix to send audio to video crew. There was very bad noise with little bit of signal.

    Tried to use other stereo matrix, no help.

    I listened from iLive T112 surface and iDr Headphones outputs; both were clear!

    I changed physical outputs of iDr, no help.

    Changed to two mono matrix, everything perfect.

    Any ideas? Latest firmware, 1.9.

    Pitk.

    Jukka “Pitkä” Kurkela
    Äänimaisema Oy, Finland
    iLiveT80 / iDr32

    #33338
    Profile photo of dnxmirrorsounds
    dnxmirrorsounds
    Participant

    Sounds like a cabling issue after the desk.

    check / replace the cables connecting them.

    Video is often on a different power source so try using an isolating transformer or DI to electrically isolate the system’s earths.

    I hope this helps

    Duncan Whitcombe
    @Dnxmirrorsounds
    Mirror Sounds & metrochurch
    Perth, Australia
    T112, iDR48x2
    http://www.mirrorsounds.com.au
    http://www.metrochurch.org.au

    #33342
    Profile photo of Pitk
    Pitk
    Participant

    quote:


    Originally posted by whitcodj

    Sounds like a cabling issue after the desk.

    check / replace the cables connecting them.

    Video is often on a different power source so try using an isolating transformer or DI to electrically isolate the system’s earths.

    I hope this helps


    Sound and video were taken from same power distro, changing cables did not help, we even tried connecting to monitor mixer. Only thing that helped was as I changed stereo matrix to two mono matrixes. Physical outpits remained the same. So the failure was defenitely in iLive system.

    Pitk.

    Jukka “Pitkä” Kurkela
    Äänimaisema Oy, Finland
    iLiveT80 / iDr32

    #33346
    Profile photo of tk2k
    tk2k
    Participant

    quote:


    Originally posted by Pitk

    quote:


    Originally posted by whitcodj

    Sounds like a cabling issue after the desk.

    check / replace the cables connecting them.

    Video is often on a different power source so try using an isolating transformer or DI to electrically isolate the system’s earths.

    I hope this helps


    Sound and video were taken from same power distro, changing cables did not help, we even tried connecting to monitor mixer. Only thing that helped was as I changed stereo matrix to two mono matrixes. Physical outpits remained the same. So the failure was defenitely in iLive system.

    Pitk.

    Jukka “Pitkä” Kurkela
    Äänimaisema Oy, Finland
    iLiveT80 / iDr32


    where were you sourcing your stereo mix from? This seems highly unlikely, I use stereo matrix sends with no problem quite often

    iDR-48, T-112, Mixpad
    College

    #33349
    Profile photo of RayS
    RayS
    Participant

    quote:


    Originally posted by Pitk

    So the failure was defenitely in iLive system.

    Pitk.

    Jukka “Pitkä” Kurkela
    Äänimaisema Oy, Finland
    iLiveT80 / iDr32


    Run your own test to make sure where the problems occurs….I use both stereo and mono matrixes all the time (using them right now actually) and it all performs as expected…..so, send measured audio signal from matrix stereo then from mono matrix either to a computer running recording software or other outboard box you own..what’s the result ? If the problem is still there then you should contact A&H support and submit a ticket….

    Or could be this possibility also http://soundforums.net/varsity/4939-phantom-power-destroying-outputs-2.html

    RayS

    R-72/iDR32/iPS10

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