hello,
I’m struggling with converting or mixing three audio signals from one polyphonic cable from VCO out to a mixed monophonic signal.
every mixer I tried delivers a polyphonic out.
an idea with pm module works, but the level is reduced.
any idea?
try this
yes, i tried it, but the resulting level is much higher then one channel. i think because it sums.
i want the three channels mixed with a resulting level the same as the inputs, or adjustable.
e.g. 0dB for the three inputs results in 0dB output.
Yeah, This is in the docs for VCV Sum
”Summing multiple audio signals usually results in an increase of audio levels, so you can account for this by adjusting the OUT level. Pay attention to the LEVEL VU meter to avoid clipping. For example, a four-voice polyphonic signal can increase the peak amplitude by 4, so it is a good idea to apply roughly 25% attenuation with Sum.”
my thoughts goes into the direction of mixers.
but I can’t find one, which mixes polyphonic channels to a monophonic output.
usually I use the mixers from venom, but they preserve the polyphony, which is fine for most use cases.
There is an option in the Venom mixers to sum the polyphonic signals to mono output. I’ve been using them instead of VCV sum. Works great.
From the manual:
Unipolar poly sum dB (audio x2) (purple): Same as Unipolar audio dB, except all polyphonic channel and chain inputs are summed to a single monophonic signal before being attenuated or amplified by the corresponding level knob. Unpatched channel inputs are normalled to 0V. Note that all CV inputs are treated as monophonic in this mode.
Or, you could use this:
Set it to “spread” in the context menu, spreading out the polyphonic signal into the individual channels, where you can control the volumes independently.
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That means I got one mixed monophonic channel and two channels with 0V. Is it correct?
if yes then I have to cut the two channels with 0V. correct?
What are you referring to? The Venom Mixer or Bogaudio
The Venom mixers Sum the polyphonic input to a mono out (Like VCV sum).
The Bogaudio mixer spreads out the polyphonic input (channel 1) to the other channels, also with a mono output.
Both will need attenuation, I don’t know of a module that averages the input instead of sums it.
sorry, the Venom Mixer.
This is just the nature of the beast when summing polyphonic signals. If the signals are very phase-coherent and equal in level, dividing the sum by the number of channels will work reasonably well. But in any other case you will need to adjust the resulting levels by ear. A more elegant generalized solution than VCV sum doesn’t exist.
Regarding the Venom Mixer poly sum mode, you could simply try it and observe the behavior. But no, you won’t have two extra channels at 0V. Poly sum mode sums all three poly channels into a single mono output.
If you want convenient control over each channel level, yet get a mono output, then the docB AUX is just what you are looking for - and it is stereo! It also gives you CV control of each channel level via the polyphonic Lvl input.
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thank you. will try both in the evening.
thank you.
both modules are working as i want.
i will use the AUX module.
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You can always just use a split module and simply send the single channels to whichever mixer you want. They’ll retain their original gain/volume this way. If you originally don’t desire any change in gain.. just run the channels through a unity mixer.
I like to convert poly signals to stereo, if that makes sense (i.e. mono in terms of channels per cable, but a stereo pair of audio signals).
This just means that each poly channel has a different position in the stereo image, and gives it some width. Have a look at Stocaudio Spread (PC only) or ASSprdr for Mac. Assuming you’re producing a three note chord, you probably don’t want two notes panned hard left and right but a small amount makes poly signals sound more interesting, to my ears at least.
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