strange noise (from ISA-428?)

Discussion in 'Microphones (live or studio)' started by jomppa, Jun 5, 2005.

  1. jomppa

    jomppa Active Member

    Oct 24, 2004

    First, I´m sorry about my poor english but I hope You will understand my problem (and hopefully I will get some help..).

    I have Focusrite ISA-428 and MH-442 AD expansion card. I was just recording acoustic bass and I noticed a strange noise. I used Sennheiser 441 mic. I tried all the channels of 428 (1-4), same noise every time. When connected to Sytek MPX-4A (via AD, ch. 5-8 ) I didn´t notice any noise. Then I tried my other mics: With all my dynamic mics (421,441,57,M201), there was that same noise when I used 428s channels 1-4, and no noise when I recorded through Sytek. And there´s no noise when I use my condenser mics, no matter what channel I use.

    Digi002R, 428, Sytek, monitors, DAW, everything is connected to the same AC circuit. Then I tried the following: In my control room ONLY 428 connected to the AC, mic into ch. 1 (then 2,3,4), I listened using the insert send of the 428… same noise.

    This thing is driving me crazy! Can You tell me what is my problem and what should I do to get rid of this noise?

    Thank You !
  2. HansAm

    HansAm Active Member

    Jun 4, 2005
    You would'nt be able to upload a sample of the noise?

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