[AudioWorksParticipant]

“I think your trouble-shooting is compromised by your imagination…”

Now that’s a line worth stealing, Thanks

[AudioWorksParticipant]

The hard reset was the answer. Not only did it fix the things I knew were issues but many other smaller things. The big change is now the meter levels look like you would expect. Before, the meters all worked but didn’t seem all that useful as compared to other boards I’ve worked on. The fader issues only added to the confusion. Like the channel signal meter would show signal and very seldom flash 0. Even when the preamp was flashing red. It’s funny how my eyes would over rule my ears. I wasn’t my favorite board for mixing. Now, with the meters and faders all working correctly, I am really impressed! It sounds all new.
Thanks to all the great minds for your help.

PS My picture is of an Allen & Heath Model 2. It is a mid 70’s, hand built desk. Each input is dated by the tester. Silver trace circuit boards, all discrete components, and transformer coupled inputs. Makes for nice recordings.

[AudioWorksParticipant]

Always go yo home screen to shut down before pushing the power button. I will back up as much as I can before doing the hard reset. I’ll let you know. Thanks for all the info.

[AudioWorksParticipant]

https://youtu.be/8Ud-Yv4xFiY should have the video “A&H Qu-24 Flying Faders” is the title.

[AudioWorksParticipant]

I thought about that too but the mixer has 24 faders. The eq has 32 bands so there are bands outside the range of the faders. The knob works perfect on those bands. It is the ones with faders that move that have the issues.

[AudioWorksParticipant]

Here is the fader being controlled by the knob. I am turning the knob as smoothly as possible. When the fader starts jumping up and down, I am still turning the knob slowly. When the fader reaches the top, then I turn the other way. Notice how smooth the fader moves till it hits the -10 mark. Then it is jerkey and sometimes it goes back down like you see in the end. Any ideas?

[AudioWorksParticipant]

Here is a video.

[AudioWorksParticipant]

Maybe this will play.

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[AudioWorksParticipant]

sorry…too large.
I can email them to you.

[AudioWorksParticipant]

Using the fader flip GEQ I can see what is going on with the audio levels. The changes seen on the touch screen of the GEQ is what you hear by using fader. It is exactly what happens to the sound level. As you reach ZERO on the eq, which is -10 on fader, you can see the level jump. That looks like 6db since the max eq boost is +12 and it looks half way. Now I know the level is increasing 6db as the fader moves above the -10. If the GEQ is accurately representing what the fader is doing to the audio level, then at -10 on the fader the level jumps 6db. From that point the level slowly increases until you hit +10 on the fader, +12 on the eq. As you lower volume from +10, just before the fader reaches -10 the EQ will still be showing at +6. When the fader passes -10, the level on the eq will jump to center reference and then slide down like you think it should. This makes the GEQ useless because there is a 6db gap between ZERO and +6 that you can’t access. Since there are only 24 faders, the frequencies outside the number of faders work just fine above ZERO with the control knob. Only the ones the faders are linked too have this issue.

[AudioWorksParticipant]

The 3db change is not a perfect number. A 3db change in volume is easy to hear. Could be more around 6db. Easy to hear when it jumps up or drops down. In the mix, it is lost when you go below 10.
I have been mixing on this board for over 9 months. In a live situation I have noticed from day one that when you reduce the volume on a channel, the instrument would seem to be lost in the mix. I would look to see if the part was over…was the player done…not always. Sometimes when you first set levels, you ask and the player to play as loud in sound check as possible…but, the player never delivers the level they will be playing at with the whole band. Never. If the instrument is a mandolin, the band kicks in and the preamp is on red alert…adjusting the preramp gain will mess with the monitor mix…so as I would drop the level in the mix (with all that is going on I never noticed the exact position of the fader) and then it seemed to be gone…turn it up, instantly too loud. To me, this has been an issue for quite a while. I have just never had a reason to “play” with the board…it isn’t mine.

Then, fader 2 stopped moving (that was an easy fix) I took the Qu-24 to my studio and finally heard (but didn’t understand) why instruments seemed to go away in the mix with such a small slider change. All the faders will increase or decrease the volume once you move the slider above or below the lowest 10. I have tried a mic, same thing. I tried the Q drive, still the same. Every input is the same when you slide past 10.

Hope this gives you more information. The fader stopped moving because of a broken trace in the circuit.

Any help is wonderful. Thanks for your time.

[AudioWorksParticipant]

Here’s a picture.

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[AudioWorksParticipant]

There is also a 10 you pass as you move the slider up. It is just below the GEQ mark.

[AudioWorksParticipant]

Was wondering if my issue might be related. On my Qu-24 as you move the fader up, at the 10 the volume increases at least +3db. All faders do the same thing. When playing music through ST3, any time you go above the 10, the volume increases or might say jumps. Is there a way to calibrate the faders like you can the motors? Firmware is 1.90. Fader firmware V02.5.

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