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Summing two channels to mono. 4 months 2 weeks ago #60756

  • lok777
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I am trying to sum L and R for the subwoofer. Output 3, R and L both outputting sends no volume nor visual info on the EQ meter. Only R or L alone will send information on. Am I doing something wrong or?

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Summing two channels to mono. 4 months 2 weeks ago #60759

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I am trying to sum L and R for the subwoofer. Output 3, R and L both outputting sends no volume nor visual info on the EQ meter. Only R or L alone will send information on. Am I doing something wrong or?

Can you post some pictures of what you see? Please show the whole plugin, one with the signal routing tab selected and another with the output signal bars whilst there is signal to inputs 1 and 2.

What you're trying to do is definitely possible.

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Summing two channels to mono. 4 months 1 week ago #60761

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I have done it like this on an SHD and it worked. Voices sound weird on this unit unless I invert one of the speakers as well, as if there is an echo or coming from two directions. Maybe they will exchange it who knows.
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Summing two channels to mono. 4 months 1 week ago #60762

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Strange that output 3 shows -81db. Have you checked the PEQS, Xover, FIR are all clear?
Warning: Just because I'm a 'Platinum' member, doesn't mean I know what I'm talking about... It just means I've asked too many questions!!

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Summing two channels to mono. 4 months 1 week ago #60763

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Yes- Re-set to default several times, and re-installed the plugin.  

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Summing two channels to mono. 4 months 1 week ago #60764

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Yes- Re-set to default several times, and re-installed the plugin.  

Just in case you haven't checked, the default may have a crossover filter applied. Although on channel 3 it's likely to be a low-pass filter which shouldn't result in no sound with a sub.

Feeling that inverting the signal sounds better is very odd. 

I've not used a Flex but I'm sure this should be working the same as you'd expect from your SHD experience. I've done what you're trying on both SHD and 2x4 HD by the way.

You've probably done it already but I'd contact miniDSP support. 

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Summing two channels to mono. 4 months 1 week ago #60766

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Bypassed by default but adding/removing the high or low pass seems to have no effect. Yeah I put in a ticket a few days ago but no word back yet

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Last edit: by lok777.

Summing two channels to mono. 4 months 1 week ago #60767

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Bypassed by default but adding/removing the high or low pass seems to have no effect. Yeah I put in a ticket a few days ago but no word back probably just gonna try to sell it online or something.

I'm sure you'll get a response in time.

If you honestly describe your unit you're unlikely to be able to sell it. 

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Summing two channels to mono. 4 months 1 week ago #60768

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So you've tried complete factory reset?Have you "tried turning it off and on again"? 

 
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Summing two channels to mono. 4 months 1 week ago #60769

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If you're having to invert one of your left or right main channels, then you have some other problem (besides your summing subwoofer issue) that needs solved.
Wiring reversed or an unexpected polarity change maybe somewhere downstream of your DSP unit????

Dave.

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Summing two channels to mono. 2 months 3 weeks ago #61306

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If I set the X-overs etc, on my computer- before the "preset" loads on the device itself(like the 5 second load time between presets)- then the issue I described happens(subwoofer stops producing sound if summed, echo sound in mains begins etc). To fix it reset to factory default, power unit off, power back on(cant just reset to factory have to manually turn it off then back on after factory reset) then reset X-overs etc on CPU ensuring you wait for the "preset" to load on the Flex unit itself before entering any information. I just kept re-entering the settings to quickly after turning it back on causing the exact same error. Just have to wait to touch anything on the computer until the units preset itself fully loads or it is the same issue, and I was repeatedly going through entering it to quickly after reset and turning it off/on. I had an SHD and this would not happen, I guess I was just setting the Flex up to fast or some weird issue between it and my CPU.

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Last edit: by lok777.

Summing two channels to mono. 1 month 2 weeks ago #61678

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I'm not sure if you ever solved your problem, but it sounds like one of your input channels is inverted upstream of your DSP. That would explain your need to invert one of your channels in the DSP to get proper stereo sound and if the two channels had similar original material, then the sum of them would be a cancelation (equal and opposite). What is your setup upstream of the DSP?

EDIT: If you're using USB input check the software for an inverted channel. If you're using a balanced unit/input check your cables to make sure one of them doesn't have the +/- signals crossed, just a simple continuity check pin1 to pin1, pin2 to pin2, pin3 to pin3 of both cables.

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Last edit: by wesharrison. Reason: Additional Information
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