Live phono input to channels C and D has terrible sound quality
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  1. #1
    Tech Wizard
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    Default Live phono input to channels C and D has terrible sound quality

    Whenever I switch a deck (C or D) to a live input and then run any sort of audio signal through said deck, I have 3 options.

    1. Set it to THRU. Means I can't use anything on the mixer (EQ, fader, filter, x-fader), and it sounds bad.

    2. Set it to USB and set the input type to LINE. The level is way too low to work with, but at least it doesn't sound bad.

    3. Set it to USB and set the input to PHONO. The level is good (sometimes too hot), I can use the mixer, but it sounds like...am I allowed to swear on this forum? Whatever, it sounds AWFUL. Hard clipping like nobody's business. I can bring the level down on the input device and turn the gain on the channel on my S4 way up, and that fixes the clipping but even then the highs are mushed and it still sounds impassibly bad.

    Now I know the difference between line and phono. Line is for hot signals, such as an instrument like a guitar or keyboard. Phono is for mic level inputs, like microphones and, well, most other things. DAW audio outputs, other S4s, etc. What I cannot understand is why I can't get an input to sound good. Is this just a problem with the S4? Have I no choice but to accept my crappy audio conversion? HALP? PLEEZ?

  2. #2
    Tech Convert
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    Well the main thing missing for a proper phono input is a ground. Did you ground your turntables somewhere else? Other than that I'd figure it would be bad cables or dirty needle or something. Also I don't think you quite understand phono inputs based on your description there.. yes the signal is boosted which is similar to a mic input but they are boosted very differently. Also DAW/computer/practically everything is line level. Phono is specific type of preamp to recolor vinyl only... cause of the way they cut/boost frequencies when pressing records. A microphone is boosted as well, but without the extra EQ stages to go through.
    Eclectic Electro >> www.modularjack.net

  3. #3
    Tech Wizard
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    Huh. Interesting about the phono signal. You learn something new every day. But I'm not talking about a TT. I'm specifically referring to when I run the output of someone else's mixer into one of my channels, or when I run the audio output of my computer via the headphone jack on my laptop to one of my channels via 1/8" to RCA so that I can control the master signal of a DAW through Traktor.

  4. #4
    Tech Convert
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    Ok well that could well be the problem. The computer output is gonna be line level, definitely not phono. As for using an 1/8" headphone jack for audio... well yeah that is also gonna be a problem. If you absolutely have to use an 1/8" headphone output from a laptop you can clean that up with a DI box.
    Eclectic Electro >> www.modularjack.net

  5. #5
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    That I get. But when I set it to line level I can't get enough gain. And I know about the 1/8" out not sounding top notch, but I've seen Glitch Mob play sets out of just their headphone jack on Ooah's MacBook and it sounded perfectly fine. Plus, I've tried this trick with a friend plugging his S4 into mine, just sending master out the RCA jacks, and same problem.

  6. #6
    Tech Convert
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    Not entirely sure why you would be running those mini headphone outputs back into your S4 rather than using the RCA ins/outs on the S4... but regardless, after being an A/V tech for many years, the only solution to crap sound from mini headphone jacks from a laptop is to stick a DI (direct input) box in the middle. It kills pretty much all the ground hum coming off the laptop and cleans it up quite a bit. Now of course you're not going to get professional grade audio out of consumer grade mini headphone jacks, but if you can't use proper connectors/soundcard then get a DI box and you have the best alternate solution. I have to do that all the time when running presentations off client laptops cause they almost never have proper soundcards on them. A DI box is cheap too, like $40 and probably less if you get the behringer version. That's my two bits, take it or leave it.
    Eclectic Electro >> www.modularjack.net

  7. #7
    Tech Wizard
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    I haven't been using the RCA outs on the S4 because that's the master out. I am sending the audio from a DAW into one of the channels of Traktor. It's fine, I seem to have gotten it to work by cranking the hell out of the gain at just about every stage. Which wasn't working before, but whatever.

  8. #8
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    The solution you're talking about requires a D/A conversion, so I'd need not only a DI box but a separate USB or FireWire audio interface or sound card to send the master out of my DAW to.

  9. #9
    Tech Convert djgwrii's Avatar
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    Default hei ts dj gwrii

    actually i got prb in traktor 2.9 input mic, i assigned my input into deck c and i routed input into deck c , then i can hear my mic sound thru on my master speaker, but i cannt use eq,fader,effects and all. please help me , im using dj tech u3 station

    thank u

  10. #10
    Tech Mentor overcast's Avatar
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    Quote Originally Posted by djgwrii View Post
    actually i got prb in traktor 2.9 input mic, i assigned my input into deck c and i routed input into deck c , then i can hear my mic sound thru on my master speaker, but i cannt use eq,fader,effects and all. please help me , im using dj tech u3 station

    thank u
    Wow, congrats on digging up a three and a half year old thread. Also this sounds like a problem for the Traktor subforum (in it's own thread) and not the S2/S4/S5/S8 subforum.

    EDIT: I said Traktor Subforum, but I actually meant Controller subforum. Wow, don't I look like a jerk :P
    Last edited by overcast; 01-20-2016 at 01:56 PM.

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