Question about Roland Pd 8 Dual Trigger Pad

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What does the polarity + - switch do on Roland PD7 & KD7 pads do? also is it possible to purchase replacement internal triggers for these & how do the thin plastic actual trigger parts work exactly??

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  • Roland Master
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The polarity switch selects whether the pressure causes a positive or negative electrical spike. This can affect whether your drum MODULE fires on the hit or when the hit is lifted.

Thin plastic triggers are an electret plastic and have piezoelectric properties.when their shape is changed by pressure, etc.

Posted on Jun 04, 2010

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Replacing ac power adapter.


If the polarity, voltage, and amperage are the same, there is no reason that you cannot use this device as an alternate.

Oct 16, 2016 | Roland Music

1 Answer

I have a RMP-5 Rhythm Coach. I cannot get any sound from the pad when I practice. Help


Hi, after doing a bit of googling it occurs to me that the internal speaker is ONLY for the metronome / click & not for the drum sounds themselves. You will need headphones or some external audio gear like your hi-fi system or oth r amp & speaker. I found this "The pad has 54 sounds in it (covering all parts of the drum kit but mostly snares), which are triggered when you hit the mesh head, but these can only be heard over headphones. The built in speaker is only used by the metronome sound (when there are no headphones attached) and then it only has a beep sound attached to it. However, plug in headphones and you get a variety of available click sounds including a proper ticking clockwork metronome." Hope that helps a little? Good Luck :-)

Dec 07, 2014 | Roland RMP-5 Rhythm Coach

1 Answer

No pad sound


Not sure what module you're using this with, but I'm familiar with Roland electronic drum pads and modules, and guess the following would stand true for any pad / module combo....
I would check the following:

  1. Is the cable correctly connected at the pad?

  2. Is the cable correctly connected at the module?

  3. Is the module sound turned up?

  4. Are your headphones / speakers turned on & up
    (do other pads sound)?

  5. Is the fader for the specific pad (or pad group) turned up?
    (On a Roland module, where the pad is AUX1 to 4 - the 'fader' button needs to be pressed in order to operate the AUX slider).

    The next couple of things are less likely, but possible.

  6. Does the pad have a polarity switch on? - try switching it.

  7. Has he correct pad type been assigned in the module?

  8. Has an instrument been assigned to the pad
    (Roland: Press INSTRUMENT, hit the Pad, select a sound)

If you get no joy with this - please drop me a message.

Dec 30, 2012 | Alesis e Practice Pad Electronic Drum...

1 Answer

Every time i hit the bass drum i hear a click along with the bass drum sound...i cant figure out where it is coming from


Unplug all the other triggers and see if it is in the mechanics of the kick mechanism. If not, then one at a time plug in the other triggers till you find one that is causing it. Could even be the bass when amplified is triggerin lightly the rim of the snare for instance.

Sep 17, 2011 | Roland KD7 Drum Controller

2 Answers

I have an IED 11 kit. Today when I plugged it in to play, both pedals have spontaneously stopped working to trigger the kick drum. I tried numerous experiments to figure out the cause of the problem. ...


Good job of troubleshooting... I assumed you have tried other triggers into the kick drum input and found it is dead. This leaves the problem in the "brain". Look in your manual for anything to do with sensitivity of the kick drum input. It is likely all the inouts are sampled and digitized by the same A-D convertor via a multiplexor switch. I was unable to find the schematic of your unit so I downloaded one for a Roland TD8. Often the different companies rob designs from eachother so one can glean methods from a different brand. As expected the inouts are conditioned and then go to a MUXX chip that samples the input. The signals are conditioned before going to the MUX by a limiter and before that there is an RF bypass cap on the input. IF you might have had a static discharge, that capcitor(s) may have shorted rendering those inouts dead. This is what I want you to try:with a suitable cable I would like you to pulse the kick input by momentarily connecting a 9 volt batery to it... try both polarities. If NEITHER polarity fires the kick, then I want you to take an ohmmeter and measure the resistance of the input. The Roland schematic has coupling capcitors and if your brand has similar circuits you should see infinite resistance... if you find it very low, say 100 ohms, probablly the RF bypass cap at the input is shorted. These will be surface mounted caps and you need to be a bit adept at electronic repair to replace them. Essentially I believe you will find a failure in teh interface ckt where those inputs come in.

Apr 18, 2011 | ION Audio IED11 Sound Session Complete...

1 Answer

Hey, I have had used the Roland PD8's for a while but recently 2 of mine have just stopped working. Maybe I hit them too hard but I'm not sure because the rest of my pads work. One will work if I hit it...


Check the connections on the undersides of the pads--they sometimes get loose as the vibrations rattle them around. Tighten the nuts that hold the pads inputs in place and reinsert the cables until they sort of "click." If that doesn't work, it might be the cables themselves, so try switching them with one you know is currently working. It'll change which sound is triggered where, but you'll know it's just the cables that need to be replaced, not the pads.

Feb 18, 2011 | Roland Pd 8 Dual Trigger Pad

1 Answer

My roland td3 drums are playing the crash noise on every drum i am hitting even when crash is disconnected, why is this please?


Your Xtalk filter is set too low. Refer to the owners manual for how to adjust individual triggers' sensitivity to "cross-talk" (vibrations carried from other pads)
My bet is you unplugged the crash trigger, but not the cable from the actual module (the brain). If you have a cable connected to the brain but not to a trigger, than any little bump to the end of the cable that isn't connected can be picked up as though you hit the pad normally. (play with the end of the cable a little, you'll see what I mean. It's kind of neat.)

Jan 14, 2011 | Roland A: TD-4 Electronic Drum Set Pads,...

1 Answer

The cable assigned to my roland TD 4 mesh snare is not registering. I thought it a cable problem so a replacement was shipped however still the same prblem. I have ensured the settings are right so I'm...


You may have a bad solder joint where the jack for the snare trigger input is soldered to the circuit board. You will have to open the case and have a look. Make a note of how many screws and where they go etc. If you have a digital camera, take pictures as you go. We have a TD3 and it has two circuit boards one on top of the other.

Nov 11, 2010 | Roland Pd 8 Dual Trigger Pad

1 Answer

Is there a rim shot trigger ?


Yes there is a rim shot trigger. Your electronic generator has to be set correctely to use it. Refer to the manual. Usually the trigger is carried on the same cable and has a "different waveform characteristic" which your Roland sound generator recognizes and reacts to.

Oct 29, 2010 | Roland Pd 8 Dual Trigger Pad

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