[Mike CParticipant]

The cable is an 1/8″ splitting into 2 1/4″ and I don’t think it’s the cable because we flipped the inputs each of the 1/4 were plugged into and still had the same problem. In addition I plugged them into one of the other sets of stereo channels and had the exact same problem.

Just to double check does you cable look like the one in the attached picture?

If you go to a mono mixer channel and plug in one cable at a time while PFL’ing the channel how do the levels compare on the meter after setting the input gain the first time and then not changing anything after that?

For a test signal from the computer play some pink noise, you can find you tube videos
of nothing but pink noise.
Or go high tech and go to Meyer Sound’s website and download their test signal that is called “M Noise”

Use the test signal for channel level test.

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[Mike CParticipant]

When pulling cables out, I noticed that if I didn’t fully plug in the 1/4 cable into the jack it read full signal.

That comment makes me think you have a balanced line wiring issue.

On the stereo inputs using the left channel only will feed as mono to both left and left outputs, plugging into only the right channel will only feed the right output, plugging into both left and right inputs will feed a stereo into in stereo to the left and right outputs.

I assume your just using the headphone jack output from the computer.

Are you taking that into an interface or a direct box type of unit?

Are you taking a 1/8 TRS inch cable that breaks out into two 1/4 inch mono
TS plugs?

Are you taking a 1/8 TRS cable that goes straight through to a 1/4 inch TRS
stereo plug?

If it is the 1/8 TRS straight through cable to a 1/4 TRS that is the problem and
would do what you said when only plugging the plug in part way.

The mixer 1/4 inch inputs are balanced line and plugging in a stereo TRS plug will result in a lot of signal level cancellation.

[Mike CParticipant]

BTW. My Experience over decades is that doing automatic level changes in a live system, especially when the situation is not well prepared before (good microphone practice, low background noise, perfect tuned sound system and so on) is very risky. Especially if you allow the automatic to raise the volumn will almost always cause feedback. Ok, I do not have articles or academic studies to prove that, only my experience.

Spot on Mfk0815, as was the rest of your post!!!!!

Let me add that the problem in discussion here may result from someone reading too much
in conjunction with too little practical experience.

[Mike CParticipant]

All told someone actually running the sound making needed adjustments based on the person speaking at a given moment is the solution, it’s why they call it “running sound”…….
and I wanted to add but ran out of edit time……….make the need adjustments when your HVAC kicks in.

Post a picture of the church sanctuary!!!

[Mike CParticipant]

I think I might be able to find a couple of channel strips, or a mix pair, I could use but would have to check the block diagram to see if that could be done.

For a single input a Y cable could be used to split that input source into two separate input channels for parallel processing.

If you use groups be sure to un-assign any channels assigned to a group from the LR mix.
That is if the group is assigned to the LR mix.

If you do not un-assign a channel from the LR mix while it is assigned to group that is feeding the LR mix you will get some phase issues from the combining of the direct channel to the LR mix and the group combining together in the LR mix due to the very slight latency difference in the two signal paths.

All told someone actually running the sound making needed adjustments based on the person speaking at a given moment is the soultion, it’s why they call it “running sound”.

[Mike CParticipant]

I know why you use the AMM, not sure I would use it for lead singers, it does work for some choir uses.

I wanted you to tell me what it’s actually doing.

Unless I can get them to use a couple of more channels and do it correctly with what Qu does provide.

You didn’t answer the question of what you wanted to do with more channels.

[Mike CParticipant]

Upwards compression can NOT cause feedback!

If the system is already unstable and from your various post I get the feeling it is, then yes it can.

Unless I can get them to use a couple of more channels and do it correctly with what Qu does provide.

What do you mean by that?

Also explain to me what you think the AMM does and how.

[Mike CParticipant]

first of all I have to say sorry to all who are not directly involved in what is coming now…

In case anyone is wondering, for what it’s worth that thread got a little heated and some of the post have had sections deleted or the entire post deleted.

Here it is!!

[Mike CParticipant]

Only one I recall is you.

You must have a very short memory, go back and re-read all the post in that original thread!

At one point you had mentioned turning the mic level caused feedback, why would think have something automatically increase the level would not do the same thing. In a studio
ok that could in a live sound system not so much.

Speaking of the sound system that sounds like it has issues of it’s own (based on various things you said at times) in addition to the operators you have never ever (even though it was asked many times) told us what the main system consisted of, how it was configured or posted a picture or two of it.

Just saying some good solid system set up may take care of some of your problems.

[Mike CParticipant]

I know what will solve our problem. I understand compression and AGC.
I have done audio for over 50 years even if aimed more at studio environment, and not at the level you and some others have live. But I do know what the problem is. And I do know what the cure could be.

There is huge difference in what you can get away with in the studio that will not work in live sound.

100% of the people who responded when you first posted this all said it will not fix your problem, and there were a lot of people who responded!

[Mike CParticipant]

On QU series I definitely don’t think that kind of flexibility is helpful for the target users – that’s why you can’t remap faders to other channels etc.

Actually if your using a stage box as the input source you can patch those inputs to any fader position, as well as the outputs can be patched to any mix source.

[Mike CParticipant]

But UPwards compression is the type we need for the problem we have.

WOW….you have given up on that yet! You seem to have forgotten EVERYONE who told that would not fix your problem when you first posted that a year or so ago.

Let me see………In running live sound when packing up at the end of night I have
never thought if only I have had an upwards compressor the event would have been successful.

Maybe the system deployment and operators are your issue….we all told the first time this topic came up as well.

[Mike CParticipant]

Most standard stereo recording or live streaming software only pick off channels/tracks 1 & 2 from the USB B multitrack output.

Do you just want to send the what the main LR mix is to the live stream or did you want to create a separate mix for the live stream.

Using a separate mix would allow for some separate mix balance adjustments to the live stream feed and you can apply EQ and compression just for the live stream feed, you will want to use some moderate compression on the live stream feed upwards to a 5 to 1 ratio and don’t go overboard on the low end on the live stream audio.
Set the mix for post fade and to start with make it post all.

You can select the audio sources sent to the USB B tracks in the IO set up menu. Select track 1 and use the input knob to scroll through the selections, pick either L R or the mix if your building a separate live stream audio mix.

[Mike CParticipant]

The recording with Shure Pad and direct to QU were nasty!

Do you get the same thing on any input channel?
Have you had a chance to check the phantom power voltage
at the mic XLR connector and or try an external phantom
power supply?

[Mike CParticipant]

Did I misread your first post?
I took as saying the Qu32 was the limiting factor and not quite up to the job.

You most certainly misread that post!!!

I said the problem is NOT in the hardware…and that was implying that the operator in that case is the problem.

I would expect the Qu could do most corporate jobs, but I have been to some where you would need a lot more because they were essentially broadway show quality events put on to boost morale of the salesmen.

And they do..

The corporate events that are on the scale of a broadway show with two weeks of set up and rehersal and paying a couple million dollars or so for production will probably have something other than a QU at FOH.

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