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I’m sad

Mixmeister motorboating

I'm trying my Mix Meister after a long period of non-use, but I'm noticing a problem that I saw 'way back in Windows 7, which caused me to stop using it: When I try to record a vinyl record, I hear a comparatively faint, but completely noticeable motorboating--under the audio is a constant thub-thub-thub-thub.(First time I tried it, I thought that there were bongo drums under the audio.)

I have fairly high-end audio equipment--Systemdek II turntable, Grado Signature 4 cartridge. Computer is running Windows 10 Pro. Recording input is "3-USB,Audio CODEC" . I've attached the turntable ground lug to the Mix Meister, and the on to the computer chassis; no difference.(I admit that what I haven't done yet is run the turntable output to a preamp and then to the computer via Line In--that may be my next step if I can't get help here.) Same problem either with Windows Recording Device Passthrough and with Audacity recording. Anyone had this problem? Any suggestions?
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  • Is the turntable grounded properly?
    If not, sure Your turntable will produce good sound but also typical background noise sure if You record higher the 44,1 kHz

    Second, the turntable (analog) uses RIAA correction , amplifiers know this and they can handle with this but Your computer sure not.

    What happens is recording level is low bass level low and his and cracks and pops high.

    The only good solution is: Turntable to amplifier with turntable input (again RIAA)
    From amplifier any line out to your computer sound card. Then it will record properly. Well the only noise then is coming from your sound card.
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  • I’m frustrated
    The MixMeister has RCA inputs switchable between Phono and Line, and the output is USB. Although there were different equalizations when I started playing with high fidelity (as it was known then), I presume that all my records, and the Phono setting of the MixMeister, are all RIAA. I have tried grounding the turntable to the MixMeister, and both to the computer chassis (which is presumably grounded through its 3-wire AC power)--no difference at all in the motorboating, which is not the 60 Hz hum normally associated with ground loops.

    Somewhere I have a phone preamp (presumably RIAA); I intend to try running the turntable outputs to that, then running the preamp's RCA outputs to an adapter and plugging into the 3.5mm Line Input of the computer, bypassing the MixMeister completely. If the motorboating continues, I guess that the problem is with the cartridge/turntable, but I'm guessing it's the MixMeister.
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  • Output to USB is sure not the best way , since other devices use the same and may distort the audio. Sure even a mouse triggers many data.

    The humming (motorboat sound) comes from a ground loop.
    Not default by 50 or 60 hz, An ATX PSU works an a hash of much higher frequencies. So the sound can be humming monotone to all sorts of sounds.

    A grounding isolator also used in a car can help.
    But for USB such thing is another matter.
    The USB port has no ground, only + and -
    The - is no ground.

    The only good solution is: a turntable with RCA output to a standard amplifier
    and from computer to amplifier line in .

    Somewhere and so on: this will help a lot.
    Also, the sound controller can usual record 24bit these days but whatevev it will be better then any MP3.
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