Balanced TRS cables with unbalanced outputs?

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sillyquestions?
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Balanced TRS cables with unbalanced outputs?

Post by sillyquestions? » Sun Dec 16, 2018 8:28 am

Hello, just looking for some tips here,

Got myself a prophet 6 and ive read it's unbalanced outputs. Currently using the unit in mono and taking a balanced TRS mogami cable from the output to the input of my Focusrite ISA 2 and then into my desk. There is an incredible amount of noise floor coming from the unit. So much so it's un-usable... Is my cabling correct? Could it be a matter of I need to use an unbalanced cable as thats what the unit outputs? When I use the pre-amp for any of my other equiptment theres no noise what so ever! Just the P6?

Any suggestions?

Cheers

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BugBrand
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Post by BugBrand » Sun Dec 16, 2018 8:50 am

Yes, try an unbalanced cable (surprised you haven't already!)
Or - check the Rane App Note for specific cabling

sillyquestions?
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Post by sillyquestions? » Sun Dec 16, 2018 8:59 am

Yeah I know... ive actually got no un-balanced ones kicking around. Strange. Thanks for the reply man!

involver
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Post by involver » Sun Dec 16, 2018 9:51 am

Make sure you're not plugged into the headphone out too.

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Post by sillyquestions? » Sun Dec 16, 2018 2:14 pm

involver wrote:Make sure you're not plugged into the headphone out too.
aha yeah! oh ive made sure alright!!

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Post by sillyquestions? » Mon Dec 17, 2018 11:06 am

hmmm... just tried an unbalanced cable, no change...

gruebleengourd
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Re: Balanced TRS cables with unbalanced outputs?

Post by gruebleengourd » Mon Dec 17, 2018 12:05 pm

sillyquestions? wrote: There is an incredible amount of noise floor coming from the unit. So much so it's un-usable.
What is the actual S/N ?

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Post by sillyquestions? » Mon Dec 17, 2018 1:27 pm

Couldnt tell you right now, it's tucked away and difficult to get into from the back. Ill try get in later. How come your asking? Is there dodgy ones?

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Post by sillyquestions? » Mon Dec 17, 2018 2:45 pm

Wait, i think you mean the prophet 6 dont you?

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Post by sillyquestions? » Mon Dec 17, 2018 2:49 pm

01288 is my p6 serial!

Panason
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Post by Panason » Tue Dec 18, 2018 4:47 pm

Maybe he meant signal-to-noise ratio , lololol :bananaguitar:

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Post by sillyquestions? » Tue Dec 18, 2018 5:38 pm

haha :bang: :yay: :nana:

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Post by sillyquestions? » Tue Dec 18, 2018 5:39 pm

How do you even calculate the signal to noise? haha thats hilarious I thought it was serial number.

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Post by dubonaire » Tue Dec 18, 2018 9:19 pm

sillyquestions? wrote:How do you even calculate the signal to noise? haha thats hilarious I thought it was serial number.
Measure the sound level in db of just the noise with no note being played on the synth, then measure the sound level of the signal with a note playing. Subtract the noise db level from the signal db level.

But you don't actually need to do that. Just adjust the level of a signal from the synth to 0 db. And then turn off the note and see what level just the noise is. A high noise level might be say -30db on the meter. A low noise level might be -80db or lower on the meter. -100db would be very low and an excellent spec.

There could be a number of reasons why you are getting noise. Have a look at the frequency spectrum of the noise as well.

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dubonaire
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Post by dubonaire » Tue Dec 18, 2018 9:56 pm

Here my Rev2 is going through a Soundcraft MTK22 into Ableton. You can see the level peaking at -6db when a note is being played, and then with no note being played. The noise is low. S/N is high enough that the noise is not noticeable.

Image

Image

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Post by sillyquestions? » Wed Dec 19, 2018 5:16 pm

Cool, thanks man. I think im just putting too much gain into my pre-amp and not paying much attention to gain staging. Sort of had a go there and there was definate results.

Im using the 12MTK and ive always had problems with it recording into ableton that high. Is this just merely as an example?

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Post by Rupert the not so great » Sun Dec 23, 2018 7:08 pm

sillyquestions? wrote:How do you even calculate the signal to noise? haha thats hilarious I thought it was serial number.
This is funny... :hihi: :yay: :banana:

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