will a passive multiple substitute for a mixer? (DC)

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bryantcheramie
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will a passive multiple substitute for a mixer? (DC)

Post by bryantcheramie »

I'm sure someone has asked the question before, but i coudn't find it anything. I want to send three DC voltages to one input via a multiple. The voltages would be 1volt/oct, so I would need them to translate in that manner when going through the multiple. Will this work, or should I just buy an intellijel unity mixer?
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Joe.
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Post by Joe. »

It might work, or you might destroy the three modules outputting the CV's. Depends on how they're designed.

Id recommend the MI Links. EDIT: but it isn't unity gain so not suitable sorry. go the intellijel.

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Dcramer
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Post by Dcramer »

Don't do it! :deadbanana:
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daverj
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Post by daverj »

When you use a multiple that way you are short circuiting the outputs together. Not a good idea. The "mix will not maintain the scale of the originals. How much off will depend on the output drive circuit of each module. In some cases you will get wild fluctuations in voltage. In most cases you will get somewhere between about 15% and 45% of each signal mixed into the output (based on the typical output resistances that range from 300 to 1K).

So your 1v/oct device would have to supply somewhere between 2.2v/oct and 6.6v/oct to make the output swing 1v/oct.
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maudibe
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Post by maudibe »

Mults are for distribution, not for mixing. End of story.
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Nuuj
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Post by Nuuj »

The intellijel unity mixer is not ideal for precision CV mixing.
If you are mixing three 1v per octave sources you also will have issues when voltages add up to more than 10v.

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Epignosis567
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Post by Epignosis567 »

What about if you're just mixing two? Would the intellijel UM still be a problem?
secretmusicuk
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Post by secretmusicuk »

Pardon my ignorance, I just started getting into this. I am a bit concerned by what I'm reading here, especially the "destroy 3 modules" part. I am wondering what to look for online to read up more about this and avoid a scary situation.
Thank you in advance for any pointer.
artistcalled6
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Post by artistcalled6 »

So someone shouldn't use

http://www.monoprice.com/product?p_id=7202

to send two audio signals into a single outboard mixer?
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Post by Coconuts »

secretmusicuk wrote:Pardon my ignorance, I just started getting into this. I am a bit concerned by what I'm reading here, especially the "destroy 3 modules" part. I am wondering what to look for online to read up more about this and avoid a scary situation.
Thank you in advance for any pointer.
Don't send outputs to outputs and always make sure you're new modules get plugged in correctly. Double check, triple check, and ask someone if your still not sure.
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mildheadwound
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Post by mildheadwound »

artistcalled6 wrote:So someone shouldn't use

http://www.monoprice.com/product?p_id=7202

to send two audio signals into a single outboard mixer?
No. Never. You can overload ungrounded 'Y' jacks, used as a mixer, vs splitter.
artistcalled6
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Post by artistcalled6 »

mildheadwound wrote:
No. Never. You can overload ungrounded 'Y' jacks, used as a mixer, vs splitter.
Which would do what? Destroy the modules, the mixer or both?
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Post by CaptainKlark »

artistcalled6 wrote:
mildheadwound wrote:
No. Never. You can overload ungrounded 'Y' jacks, used as a mixer, vs splitter.
Which would do what? Destroy the modules, the mixer or both?
Not sure on what parts of the chain could be damaged, but just don't do it. Mixers have circuits built into them that balance the levels so they can be properly added together. Mixers are more complicated than say, 4 inputs with cables all soldered to one output, so you shouldn't do the same thing externally with y jacks.
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