Any thoughts on why the built-in Digital Reverb on my ADC-3160A is different sounding on the Swell versus Great stops?
On all stops of the Great Manual, the digital reverb is reasonably long and quite effective. However, on all stops of the Swell Manual, the digital reverb is quite short and subdued.
The ADR-4 reverb module has 2 separate output channels with separate gain and bass controls for each--check that both outputs are connected, maybe unplug and plug back in each connector (to make sure the contact is still good) and that each channel has control settings (bass and gain) about the same.
There is also a jumper on the ADC Mixer board that should be set to LK2 for stereo reverb.
Those are the normal settings which could cause a difference between the reverb on the two halves of the organ. Other things would be abnormal--i.e., a malfunction.
Do you know if the Output 1 / Bass 1 is for the Great or the Swell or both?
I would assume that the Pedal would be the same as the Great.
Since the delay time is associated with the Dip Switch 1,2, & 3 settings, what do the Output / Bass pots do?
Do you know what Dip Switch 4 does? The Reverb instructions indicate that it controls whether it is Front of Auditorium Reverb versus Rear of Auditorium Reverb. Not sure what this means.
Organ channels 1 and 2 are for the Swell; 3 and 4 are for the Great. Reverb output 1 feeds into organ channels 1 and 2; Reverb output 2 feeds into organ channels 3 & 4.
Yes, the Pedal is mixed in with the Great.
Switch 4 with a Front/Rear setting probably changes the initial delay time--I am speculating here, as the Allen info doesn't say exactly what is happening that is different. But typically a rear reverb signal would have a slightly longer initial delay; since the reverb is usually mixed in with the main speakers, Front delay is probably the most common setting (switch 4 off).
I thing that the output pots just control the signal level that feeds into the audio mixer, and that they should be set to the same level for output 1 and output 2; if all 4 speakers are the same, then the bass pots should be set the same as well; they would control how much bass reverb you get.
Don't overlook the four pots on the ADC mixer board. These adjust the amount of signal from each organ channel that gets fed to the reverb unit. I always set the four to the same level, about halfway through their rotation. Perhaps the two that adjust the swell reverb level are turned down.
Keep in mind that reverb is basically MONO and there is no separate adjustment inside the ADR-4 unit that affects the individual channels. On the ADC Mixer board, the four channels are combined to a single monophonic output, which is fed to the ADR-4. On the ADR-4 there is a single "input level" control to adjust how much of it gets fed to the delay line.
Internally, the ADR-4 sends the mono signal to two separate delay lines whose clocking is intentionally different. In other words, it goes through one line just a bit faster than through the other one, and the recirculation may be just a bit different too. This results in the outputs of the two delay lines being "incoherent" and thus giving the effect of simulated stereo, much the way your two ears would detect slightly different degrees of reverb if you were sitting in a reverberant room.
These two reverb signals are separately sent out (adjustable via the two output level pots on the ADR-4, and the two bass output pots), and go into the ADC mixer to be re-combined with the four output channels, with the "left" stereo channel feeding two channels and the "right" stereo channel feeding the other two. In this model, the left signal goes to one swell and one great amp, and the right to the other swell and the other great.
So, if you get less reverb on the swell than on the great, the only controls that regulate this are the four small pots on the ADC mixer board. The input and output controls on the ADR-4 operate only on the combined monophonic signal and have no effect on individual channels or divisions.
John
---------- *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!
Much thanks for the detailed explanation. As always, your expertise is much appreciated. Will investigate per your recommendation.
I have another question pertaining to the Card Reader.
i did search the Forum for Card Reader servicing and of course, you responded to quite a few posts on this subject.
My Card Reader is starting to malfunction. When I insert cards for standard organ stops, it is erratic. The tones produce sounds that do not match the card names including sustain. Tones for organ stops are functioning like percussive stops.
Since the Card Reader functions but the same card inserted sometimes functions and sometimes does not, I'm assuming there must be a bunch of dust/crud in the card reader that causing the problem, based on what i have read on other posts.
The question i have for you is how to clean the card reader? Are there any precautions during removal and disassembly? Some of the posts indicate there is a battery. Does that apply to an ADC-3160A? I don't see any battery for the card reader... Incidentally, how many batteries are in the ADC-3160A. i have found only one for the capture memory. Are there other batteries???
Again, much thanks for your significant contributions to the Organ Forum and would appreciate any insight on the Card Reader that you can share.
Other than the Card Reader, my ADC-3160A has functioned flawlessly since I purchased it in April. The Reverb concern has existed since i purchased the organ but it is a very subtle difference and only after playing the organ for many days has it raised an eyebrow. i think your comments on the Reverb are spot on and it's more a matter of how i adjusted the voicing between the Swell and Great stops and has really nothing to do with the Reverb itself.
I have another question pertaining to the Card Reader.
i did search the Forum for Card Reader servicing and of course, you responded to quite a few posts on this subject.
My Card Reader is starting to malfunction. When I insert cards for standard organ stops, it is erratic. The tones produce sounds that do not match the card names including sustain. Tones for organ stops are functioning like percussive stops.
Since the Card Reader functions but the same card inserted sometimes functions and sometimes does not, I'm assuming there must be a bunch of dust/crud in the card reader that causing the problem, based on what i have read on other posts.
Bachnuss,
Have you confirmed all lights are on in the card reader? If so, then the other 2 options are a voltage adjustment (covered in a recent thread in this Forum) and cleaning. If just one light is out, the sound won't be correct, because the numerical value called from the onboard computer will not be correct.
Meanwhile, I'll try to find that thread and post it here.
There is no battery on the 3160 associated with the card reader. It is only the "large-cage" ADC and MDS models that have a memory battery for the card reader voices, and it is on the USAV board inside the cage. No battery in the cage of your 3160. Just the one battery pack for the DM-3 capture board.
The card reader problem you describe could well be due to dust and debris inside the reader. I'd check all the connections in the system before going to the trouble of dismantling the reader though. Look inside the cage where the AV-1 board is located and you may see several multi-pin connectors that go to it. Any one of them might not be well seated. Also, the card reader itself connects to the MADC CM-1 or CM-2 board on a multi-pin connector, and there could be something faulty at that point. The wires from the reader go down into some metal "pinchers" on the plug, and they sometimes aren't properly pressed into place. You can use a simple tool such as a sharpened Popsicle stick to be sure they are firmly seated into the body of the plug.
Also, try adjusting the lamp voltage up and down by a volt or so in each direction. The lamp voltage comes from a small power supply in the floor of the console, and you can use a voltmeter to track what you are doing. It shouldn't need to go any higher than 9 volts or any lower than 7, but different readers seem to have differing sensitivities, so do try that before you go any further.
If you decide to dismantle the reader, just pay VERY careful attention to how it comes apart. Document the location of every screw, washer, nut, spacer, etc., so you can re-assemble it just as it was. Once you have it broken down, you can use compressed air to clean out the holes, dust off the photocell sensors, remove the cobwebs from the slot. Just try to get it spotless and then put it back together.
I've never known an MADC card reader to fail, except when a lamp burns out, so you're in new territory. But it should be obvious how to fix it once you get started.
John
---------- *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!
Much appreciate your response, especially since I have my organ back cover removed at this very moment. How can i check the lights? Are they always on when the power is turned on? Or, only when a card is inserted into the Card Reader? How many lights should be on?
Only six lamps on the MADC reader. They are on whenever the organ is powered up.
John
---------- *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!
I have a computer vacuum with small attachments and I used it to vacuum along the open sides of the Card Reader. After doing so, all is working perfectly.
All lights appear to be working. Unfortunately, I wrote too soon. The issue has returned. I thought it was fully resolved. However, I decided to run through all of my tone cards and suddenly it started to misread the cards again.
It seemed easy enough to remove the Card Reader, so I did so. i disassembled it and cleaned the holes. Not quite sure how this Card Reader actually functions. Regardless, I reassembled and reinstalled back into the organ. No improvement...
I will try increasing the voltage of the power supply.
Where is the power supply for the lamps? I looked everywhere except in the cage. Once i find the lamp power supply, does it have a pot to turn up the voltage?
i will also check for connections as your recommended, as well.
Where is the power supply for the lamps? I looked everywhere except in the cage. Once i find the lamp power supply, does it have a pot to turn up the voltage?
Bachnuss,
I'm not sure about a MADC organ, but the card reader power supply can be viewed at this link for a MOS-2 organ. I think it's the same for ADC organs.
Michael
Way too many organs to list, but I do have 5 Allens:
Lamp supply is in the floor, adjusted by a shaft on the side of the 12 volt supply. Knob marked "CR"
John
---------- *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!
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