Weird Signal coming through my Audio interface input.

Discussion in 'Computer Hardware' started by MrLyannMusic, Mar 21, 2016.

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  1. Baxter

    Baxter Audiosexual

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    Aile..aelie...ae....aliens!
     
    Baxter, Mar 23, 2016
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  2. Jazz-N-Stuff

    Jazz-N-Stuff Platinum Record

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    pls use other spectral analyzers, with a range at least up to abt 50 khz to see more.
    It might be 22,05khz or 24khz (half frequency of 48khz or 44.1khz sample rates) switch to 96khz and check if the spike changes to 48khz. It might be bad "shielding" on the motherboard or cables.
    I use this MB for such reasons : http://www.gigabyte.us/MicroSite/335/images/audio.html
    Computers produce a lot of high radio frequencies which can fuck up the audio. These can also emit into USB and external interfaces.
    Try ferrite core blocked USB cables: https://en.wikipedia.org/wiki/Ferrite_bead

    I hope we can find the "GHOST", maybe electronic engineers here on this site can add their opinion. I am abt 30 years out of this job...
    these are just some thoughts i had when i saw these oscillating spikes.
     
    Jazz-N-Stuff, Mar 23, 2016
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  3. MrLyannMusic

    MrLyannMusic Audiosexual

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    funny, because i already have this one, and the audio interface usb cable is passing through that already...
     
    MrLyannMusic, Mar 23, 2016
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  4. studiodiciassette

    studiodiciassette Guest

    i think that your best bet now will be tryin' another soundcard... if possible, obviously...
     
    studiodiciassette, Mar 23, 2016
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  5. SineWave

    SineWave Audiosexual

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    I'm sorry I have to say this, but I think your MobilePre must be going dodgy, MrLyann. :(

    Maybe some condensers or ICs are starting to fail. I'm just trying to be objective. :(
     
    SineWave, Mar 23, 2016
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  6. Rasputin

    Rasputin Platinum Record

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    Life is too short to troubleshoot M-Audio gear. No offense intended; I've owned some myself, but never regretted moving on past the initial sting of clicking "Add to Cart" for something better.

    In other words, use it until it becomes an actual problem and then ditch it.
     
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    Rasputin, Mar 23, 2016
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  7. Baxter

    Baxter Audiosexual

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    All audio interfaces have noise-floors. Some higher than others (including the M-Audio brand). ;)
     
    Last edited: Mar 23, 2016
    Baxter, Mar 23, 2016
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  8. ArticStorm

    ArticStorm Moderator Staff Member

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    i do have some white noise around 4kHz to 20khz when i have an EQ8 on my master in ableton, but the volume is much lower, its around -220dB and goes sometimes up to -160dB. dB is logarithmical scale, so its not hearable for us.

    M-Audio tends to have a higher noise floor as other interfaces.
     
    ArticStorm, Mar 23, 2016
    28
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