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RME BABYFACE PRO NOISY ANALOG INPUT #2887042 09/04/19 09:15 PM
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MooganDavid Offline OP
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Hello friends I got a question is it normal to have some noise when I plug both channels of my Yamaha CP33 outputs into the external instrument inputs on the BF pro? I use Cantabile Solo as my host and I can raise the volume sliders of my software instruments all the way up (without playing anything) and there's no noise but if I do the same with the volume slider designated for the external instrument (CP33) internal sounds I get a lot of noise (almost like a 60 cycle hum) I plugged it into low impedance inputs first and move the cables to high impedance inputs and it didn't change the noise level. Luckily I have to turn the volume up pretty high without playing to hear the noise but I know it's still there and for the money I spent I think it should be perfectly clean. Thanks MooganDavid

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Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887046 09/04/19 09:34 PM
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I have used the BabyFace Pro analogue inputs and found them to be quiet (albeit that was with consumer audio gear and home-made RCA-XLR cables).

This might be a ground loop. Can you try running your laptop unplugged or the CP33 with batteries?

If you are in the US, some homes use an odd 2 leg system. If you can find an extension cord to plug ONE component in a different room that goes to the other leg on your fuse panel that might work. There are other solutions to ground loops you can search for.

Check to make sure your cables are properly made using a multimeter and the following guide.

http://rane.com/note110.html

The BabyFace user manual guide has some tips also on proper cabling:

"The Babyface Pro has two analog microphone inputs that can operate as line inputs with levels up to +19 dBu, when set to 0 dB gain and PAD active. The electronic input stage uses a servo balanced design which handles unbalanced and balanced signals correctly, automatically adjusting the level reference.

When using unbalanced cables with the XLR inputs pin 3 of the XLR jack should be connected to ground. Otherwise noise may occur, caused by the unconnected negative input of the balanced input. "

Last edited by newer player; 09/04/19 09:43 PM.
Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887050 09/04/19 09:47 PM
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This guy complained his CP33 analogue outputs were very noisy, so he tapped the digital output directly.


Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: newer player] #2887054 09/04/19 10:14 PM
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MooganDavid Offline OP
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Thanks newer player but I think I'm going to bypass that idea although it's probably the best solution the sounds inside the cp33 aren't worth the trouble wouldn't you agree?

Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887055 09/04/19 10:17 PM
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MooganDavid Offline OP
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I just use some of the pianos in the cp33 to fatten up my vienna imperial and truekey american grand and hauptwerk stuff but it is a damn nice keybed and can be used for a 2 zone controller.

Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887057 09/04/19 10:20 PM
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I just use some of the pianos in the cp33 to fatten up my vienna imperial and truekey american grand and hauptwerk stuff but it is a damn nice keybed and can be used for a 2 zone controller.

Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887058 09/04/19 10:24 PM
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The sounds on the CP33 are not worth the DAC patch work from the vido IMO.

You can still check the tips from my first post regarding proper cables, testing your cables, ground loops. You never know with these things.

Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887077 09/05/19 12:30 AM
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puremusic Offline
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It's probably the cables. How long are they?


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Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887153 09/05/19 07:43 AM
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The audio input cables or the usb cables ( 1 for midi and 1 for interface data) to laptop?

Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887240 09/05/19 11:36 AM
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puremusic Offline
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Audio cables. Too thin and they pick up interference, too long and they pick up interference, too close to electric wiring or unshielded and they... You get the picture.


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Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887261 09/05/19 12:09 PM
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Mark Polishook Offline
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Your CP-33 may be noisy. You may have a ground loop. While I haven’t used the the BFP, my understanding is it’s QUIET. Try and diagnose the issue one thing at a time (try solution A, try solution B, etc.). You’ll find what the problem is. Newer player has already mentioned he knows of a noisy CP33 so that could be a significant clue ...

Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887266 09/05/19 12:21 PM
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@MooganDavid: You didn't say anything about your environment. There are electrically quiet environments and there are noisy ones. What's yours like?

I use long cables, many of them of the cheap cheap cheap variety.
And there's no noise. No hum. No hiss.
So my electrical environment must be pretty quiet.

Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887304 09/05/19 02:46 PM
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Enforce a symmetrical cable setup.
Either by getting something like https://www.thomann.de/de/behringer_microhd_hd400.htm
You'd need a TRS Stereo 1/4 jack cable to stereo if I see properly on the connectors.
Or, if it has it, forward USB audio OUT signal digitally to your soundcard, then play it back.

Note on the first option is that you have to apply more gain, because it's passive!

Last edited by nicknameTaken; 09/05/19 02:50 PM.
Re: RME BABYFACE PRO NOISY ANALOG INPUT [Re: MooganDavid] #2887313 09/05/19 03:33 PM
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Thanks all for the suggestions I opened up Rme TotalMix Gui and clicked on the pad switch left and right Hardware input channels and that quieted things down pretty good but that 60 cycle hum is still there but barely audible. Must be a ground loop somewhere but I haven't found it yet.


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