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damj
Joined: Apr 17, 2012 Posts: 4 Location: skattungbyn, sweden
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Posted: Tue Apr 17, 2012 11:42 am Post subject:
boss dr-110 trig mod |
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I am new here and kind of new with electronics. I am modifying a dr-110 and I want to add both trig in and trig out for each sound.
As I understood it the dr-110 uses s-trig and I want to use normal gate.
The only idea I have figured out is to cut the cable between the analog and digital board for each sound and add a s-trig to v-trig converter between the out jack and the digital board and a v-trig to s-trig converter between the in jack and the analog board.
It doesn´t seem like the smartest solution... I have to build a lot of converters and I need to patch it to use the internal sequencer.
Surly someone here can come up with a better solution |
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richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
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roglok
Joined: Aug 28, 2010 Posts: 202 Location: uptown
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Posted: Thu Apr 19, 2012 12:31 am Post subject:
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Awesome, Richard! I have a DR-110 with a broken CPU board lying around and never managed to trigger the snare properly...
It would be awesome to find a simple way (preferrably analog) to make the timing and amount of clap trigger-bursts adjustable from the front panel - Simmons Clap Trap style...
When I find the time, I'm gonna get back to this and probably rack it up as a euro module... |
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richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
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Posted: Thu Apr 19, 2012 8:45 am Post subject:
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roglok wrote: | Awesome, Richard! I have a DR-110 with a broken CPU board lying around and never managed to trigger the snare properly... |
One thing...the external triggers should be of similar duration to the original: 1mS to no longer than 5mS or so. As the trigger gets longer, the inherent "thump" of the one-transistor VCAs becomes more noticeable. Also, the ringing, damped oscillators of the Snare shell and Bass will trigger on a falling or rising edge. Make the trigger(s) too long and you'll get two sounds per trigger, instead of only one -- which now that I think of it might be useful!
To ensure that external triggers produce short pulses you could put a cap before the 4069 input, selecting the value for that and the pull down resistor to produce a suitable duration. I use this: http://hughestech.com/rc_calculator/
Quote: | It would be awesome to find a simple way (preferrably analog) to make the timing and amount of clap trigger-bursts adjustable from the front panel - Simmons Clap Trap style... |
Umm...I have an idea that would do that, but don't want to say anymore until I actually try it -- and there's no telling when THAT would be. Maybe saying that it would use a CD4538 dual retriggerable monostable multivibrator and a gated schmitt oscillator is enough of a hint for someone else to try it. _________________ Revenge is a dish best served with a fork... to the eye |
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damj
Joined: Apr 17, 2012 Posts: 4 Location: skattungbyn, sweden
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Posted: Thu Apr 19, 2012 1:58 pm Post subject:
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Thank you Richard, it does not look to difficult, I think (hope) I can get it to work... |
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roglok
Joined: Aug 28, 2010 Posts: 202 Location: uptown
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Posted: Thu Apr 19, 2012 2:31 pm Post subject:
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Quote: | Also, the ringing, damped oscillators of the Snare shell and Bass will trigger on a falling or rising edge. |
Right! I remember this from the 808 BD clone. The triggers from my 606 would retrigger the kick, because they have a small negative peak after the initial falling edge...
I got the fix from Eric Archer's page, which is basically the same as your suggestion:
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j.dilisio
Joined: May 19, 2009 Posts: 200 Location: baltimore
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Posted: Sat Nov 15, 2014 12:29 pm Post subject:
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I'm just adding trigger inputs on my Dr-110 so I can have midi control.
It seems like I can do all voices with just one CD4049 if I just use a single trigger rather than a burst for the Clap.
I figure, a software retrigger would have the same effect.
So, would I just split the clap trigger from the 4049 with two diodes and connect to the same resistor junction as the OH, CH, CY triggers? _________________ DRONEGOAT |
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richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
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Posted: Sun Nov 16, 2014 7:03 am Post subject:
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j.dilisio wrote: | So, would I just split the clap trigger from the 4049 with two diodes and connect to the same resistor junction as the OH, CH, CY triggers? |
No. The CPii trigger has to occur after any multiple pulses on CPi, otherwise it just sounds like one over-loud Clap. I tried it by manipulating DR-110 samples using an audio editor called Wavosaur.
A single trigger at CPi (the upper, "burst" portion of the cicuit,) sounds sort of like a hand clap -- if one uses some imagination. A trigger at CPii (the lower, "reverb" circuit,) sounds like a gunshot. Both circuits triggered at the same time just sounds like a single clap with fake reverb. To confirm that assessment I tried it on a REAL DR-110. (My efforts at cloning were taking too long and not going well, so I gave up and bought one.)
However, a single pulse instead of a burst on CPi, followed by a delayed pulse on CPii sounds more like how we'd like hand claps to sound. A circuit to do that should be fairly simple: A one-shot that pulses on the trigger leading edge, and another that pulses on the trailing edge. The trigger duration would have to be long enough that there would be a discernible delay between the first and second pulse.
(And roklok, more pulses in the burst just sounds like more hands clapping. Spacing them out sounds like a machine gun burst and a single pistol shot back -- which is a shame: I was hoping it'd sound like a Güiro.)
Another idea, which would only work if the '110 digital board is fully functional, is to put an analog switch In/Out on the terminals of the DR-110 Clap button. This would produce a genuine full DR-110 Clap. (One might be tempted to do something like that for all the voice buttons, but because the matrix doesn't have a diode for every button there could be conflicts trying to get two or more voices to sound simultaneously.)
Lastly, there's Dan Lavin's PICAXE solution in the DR-110 Modifications thread. That'd be a learning experience.
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_________________ Revenge is a dish best served with a fork... to the eye |
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j.dilisio
Joined: May 19, 2009 Posts: 200 Location: baltimore
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Posted: Sun Nov 16, 2014 10:00 am Post subject:
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I decided on the single trigger clap option.
It may not sound as juicy but it's still plenty useable.
Thanks for sharing all of this, Richard.
Much appreciated.
Here is a photo of mine with trigger inputs..
The hardest part was getting the case shut really. It took me a couple hours this morning.
I had it all wired up and then realized it wasn't going to fit so I had to start over.
I'm aiming to add trigger inputs on all my non-midi drum machines and build one of these..
http://www.elby-designs.com/contents/en-us/p959_MIDI2SDS-16.html
as a control center with 16 trigger outs.
Cheers! _________________ DRONEGOAT |
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