MIDI controlled LED spot light

[bigal]

Hi, can anyone advise please ? I have a Roland mesh drum kit (TD12) and my band need to be able to see my tempo indicator of my controller module when playing live. I was looking for a MIDI controlled LED spot (low voltage) which I could run to the front of stage, could the MD24 be used for this ?
Lastly what would the total cost be for a MD24 including P&P to Scotland, UK ? or is this available to buy in the UK ? Many thanks

[John]

Hi, can anyone advise please ? I have a Roland mesh drum kit (TD12) and my band need to be able to see my tempo indicator of my controller module when playing live. I was looking for a MIDI controlled LED spot (low voltage) which I could run to the front of stage, could the MD24 be used for this ?
Lastly what would the total cost be for a MD24 including P&P to Scotland, UK ? or is this available to buy in the UK ? Many thanks

Do you plan to power the spot using the MIDI board? Or does it only require a control signal? To give a complete answer, it will help to know the characteristics of the electrical output signal you need.

Also, does the drum kit send MIDI notes as a tempo indication, or does it send MIDI "clock" messages?

If you can answer these questions, I can provide more information.

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[bigal]

Hi, thanks for your pointers to answer your questions 1) Yes I plan to power the LED light from the MIDI board, I am thinking of using a 'Dot it' 3 LED stick on light that uses 4.5V dc at front of stage, maybe even two Dot it LED lights. 2) Not sure what the MIDI tempo signal from the Roland TD12 is, I have the user manual in pdf but the file size is 5.75Mb so will not upload,(downloaded from Roland site), it may help out,if you could read it, thanks.
I will try adding the MD24 to the shopping basket & see what the shipping costs are, thanks again.

[John]

Hi, thanks for your pointers to answer your questions 1) Yes I plan to power the LED light from the MIDI board, I am thinking of using a 'Dot it' 3 LED stick on light that uses 4.5V dc at front of stage, maybe even two Dot it LED lights. 2) Not sure what the MIDI tempo signal from the Roland TD12 is, I have the user manual in pdf but the file size is 5.75Mb so will not upload,(downloaded from Roland site), it may help out,if you could read it, thanks.
I will try adding the MD24 to the shopping basket & see what the shipping costs are, thanks again.

The MD24 can source up to 25mA per output, so if the LED draws less than that, it should work fine.

If the LED draws a larger current, you might consider the MSA-T.

[bigal]

Thanks for you advice, I contacted Roland technical guys & they replied with the following -
"The TD-12 sends midi clock messages to synchronise the tempo with other midi device products. System real time messages such as midi clock message can speed up or slow down as soon as the tempo has changed on the TD-12 (or received if the TD-12 is synchronised as a slave) and uses active sensing to tell the device that it is connected. The electrical output signal to create midi clock is beyond the scope of support we offer. A midi clock message from a midi device such as the TD-12 can be analysed using a computer, a midi interface device and a program called midi ox, this will provide you with the midi data strings sent from the TD-12 but not electrical signal information." Hope this helps out with understanding the MIDI tempo signal.
The LED I plan to use is a high intensity 5V one which draws 22mA so sounds as if it will be OK with the MD24.
Thanks again for your guidance.

[John]

Ok, I would recommend the MPA (http://highlyliquid.com/kits/mpa/) for your application. Its main purpose is the potentiometer outputs (which you don't need), but it also has 8 logic outputs. As of this writing, the MPA is the only decoder product that will automatically produce a "beat indication" signal from MIDI clock input. See logic mode "0F" in the firmware user manual...

Hope this helps--please let me know if I can provide more information.

[bigal]

Thanks for bearing with me on this one, so if I use an MPA & connect MIDI to MIDI to the Roland TD12 module then do I still have to add an external LED to see the beat indication or does the MPA have an LED built in that shows this ? (Activity LED ??)
(By running a MIDI cable to front of stage & using it's own built in LED)
Do I need to programme the MPA at all or set any of the internal DIL switches ? Think I need more pointers please !! Thanks

[John]

Thanks for bearing with me on this one, so if I use an MPA & connect MIDI to MIDI to the Roland TD12 module then do I still have to add an external LED to see the beat indication or does the MPA have an LED built in that shows this ? (Activity LED ??)
(By running a MIDI cable to front of stage & using it's own built in LED)
Do I need to programme the MPA at all or set any of the internal DIL switches ? Think I need more pointers please !! Thanks

You'll need to do the following:

1. Send a SysEx message to the MPA using the MIDI interface on your computer. You'll want to configure one of the MPA outputs for the "Sync, 1 pulse per quarter note" output mode. See the following link for SysEx info:

http://highlyliquid.com/support/library/midi-sysex/

Details about configuration are in the MPA firmware user manual.

2. Connect your own LED circuit to the output of the MPA. (The activity LED does not indicate the beat, sorry.)

3. Connect the MIDI Out from the drum module to the MIDI In on the MPA.

Hope this helps--please let me know if I can provide more information.