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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Tue Mar 01, 2005 5:55 am Post subject:
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Hi all
I posted a cool mod for the Sound Lab. A Sample and Hold circuit which is a nice way to generate some voltage changes that can be used to control the synth to create repeating or random patterns of notes.
There is a link to it on the main page of:
Music From Outer Space
I noticed that the site was not responding this morning. It looks like LunarPages is not off to a good day which is a very rare event. I'm sure they will have it fixed in no time so please be patient. _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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Alex_D_Steak
Joined: Feb 17, 2005 Posts: 40 Location: Switzerland
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Posted: Tue Mar 01, 2005 5:59 am Post subject:
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today the whole internet seems to have issues.... I have malfunction
reports from here in Italy and also from friends in the Netherlands... _________________ Doctor... who? |
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mosc
Site Admin
Joined: Jan 31, 2003 Posts: 18197 Location: Durham, NC
Audio files: 212
G2 patch files: 60
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Posted: Wed Mar 02, 2005 7:23 am Post subject:
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I split this into a new topic in the Sound Lab forum. One of the advantages of having a dedicated forum is the ability to have many separate topics. _________________ --Howard
my music and other stuff |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Wed Mar 02, 2005 6:59 pm Post subject:
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Thanks mosc! _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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dnny
Joined: Mar 12, 2005 Posts: 519 Location: Helsinki, Finland
Audio files: 8
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Posted: Mon Mar 14, 2005 1:35 am Post subject:
simple sample & hold trg -connection |
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Hi all
i am building sound lab for my self and i´m a newbie to these DIY-synth-stuff
so here comes the guestion:
where sould i connect the sample and hold TRG point on my sound lab ?
for me this project has been a very nice experience and i feel that im stepping to a new world
Daniel
sorry about my english
spellcheck roks |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Mon Mar 14, 2005 6:10 am Post subject:
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Hi Daniel
Connect the TRG out to the gate input on the Sound Lab. Sorry for the confusion on the naming but the duration of the TRG pulses is only a few milliseconds so I couldn't really call it a gate. The TRG pulses will trigger the Sound Labs AR envelope generator when connected to the External Gate input (point X3 connected to the anode of D7). Everytime the voltage from the sample and hold changes the AR will be triggered which will allow you to control the filter, vca, and or oscillator with the envelope.
Hope this helps _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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dnny
Joined: Mar 12, 2005 Posts: 519 Location: Helsinki, Finland
Audio files: 8
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Posted: Mon Mar 14, 2005 3:56 pm Post subject:
confused about the ins and outs |
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first thanks for your great pages and this sound lab project.
nower days i have been confused about those ins and outs. so please be patient and explain me sould i connect my keyboard to point X3 (external gate) aswell with the sample and hold TRG output ? or where sould i plug the keyboard? one thing is clear to me - the main output
sorry for being a dummy - everyday i learn something new - soon i will master my sound lab
daniel |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Mon Mar 14, 2005 9:17 pm Post subject:
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First off you are not a dummy at all. I envy the fact that you speak two languages and well at that. Anyway here's the thing. You only have one gate input to the Sound Lab so you have to connect the gate input to either the keyboard of the sample and hold. In the case that you connect it to the sample & hold the keyboard will still provide a pitch offset so that the sample and hold output will be higher or lower depending on which key you press. But the S&H will start the AR envelopes. If you connect it to the keyboard it will start the envelopes and the sample & hold will provide pitch variations only. Either way is cool. Experiment and see what you come up with. I have posted a mode that shows yuo how to add more CV inputs for the oscillators.
Cheers and good experimenting
Ray _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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dnny
Joined: Mar 12, 2005 Posts: 519 Location: Helsinki, Finland
Audio files: 8
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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paul
Joined: Feb 22, 2005 Posts: 31 Location: Italy
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Posted: Tue Apr 12, 2005 3:02 am Post subject:
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Hi Crew,
just finished 2x S&H circuits and they are great!
I've used TL074 instead of TL084 and BF245 (oriented differently) instead of MPF102.
Many Thanks to adhdboy as usual
ciao _________________ paolo ferrari |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Tue Apr 12, 2005 6:12 pm Post subject:
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Hi Paul
Glad you enjoyed that one. Its pretty absorbing once you get started.
Cheers
Ray _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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killsurfcity
Joined: Apr 13, 2005 Posts: 21 Location: Philadelphia, PA USA
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Posted: Wed Apr 13, 2005 6:44 am Post subject:
For the patched out version... |
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the page for the sample and hold lists places you can patch it to. would these points be inputs on the patch out version, or are they additional?
basically i just want to know if i should add a switch, or more patch points or neither.
thanks,
-et- |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Wed Apr 13, 2005 2:20 pm Post subject:
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The points listed on the Sample and Hold page are circuit points from the SoundLab Schematics. You can add patch points connected to these if you like. I always recommend a 1K resistor between the circuit point and the banana jack patch point to protect against shorts. Alternatively, you can use a rotary switch with the poles connected to the suggested circuit points and the center pole connected to the input to the Sample and Hold.
I hope this helps.
adhdboy _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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killsurfcity
Joined: Apr 13, 2005 Posts: 21 Location: Philadelphia, PA USA
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Posted: Wed Apr 13, 2005 2:38 pm Post subject:
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I hope this helps.
[/quote]
yes, it does.
thanks,
-et- |
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killsurfcity
Joined: Apr 13, 2005 Posts: 21 Location: Philadelphia, PA USA
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Posted: Thu Apr 14, 2005 5:50 am Post subject:
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okay, so for the normalized version the sample and hold has a rotary switch to switch between sample points (?), and a 1M pot for variation of some sort.
for the patch out version, if one were to add jacks for the points normally routed via the rotary switch of the s&h, do you think could work those new patch points could be useful in other forms of patching?
if they are just going to be routed to the s&h it would seem silly to put inputs for all of them, but if they can be safely routed elsewhere jacks could be a cool option. especially so you could connect the input of the s&h to all the points at once.
-et- |
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Wild Zebra
Joined: Apr 28, 2005 Posts: 806 Location: Ohio
Audio files: 5
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Posted: Tue Jul 26, 2005 9:51 am Post subject:
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I got a question about this here Sample and Hold. I'm wondering should I just connect it to the boards(SoundLab) power supply and ground or do I need to hook it up to some new batteries? _________________ "your stripes are killer bro" |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Wed Jul 27, 2005 2:05 pm Post subject:
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The boards power supply and ground are fine. Its pretty low current. _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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Wild Zebra
Joined: Apr 28, 2005 Posts: 806 Location: Ohio
Audio files: 5
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Posted: Thu Jul 28, 2005 7:37 am Post subject:
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Thanks Ray, I kinda figured as much, but thanks for comfirming. Thanks again for such a great project. I can't keep my hands off this synthesizer. All my friends are so impressed, myself included
Bad part is I haven't touch my poor guitar in weeks. _________________ "your stripes are killer bro" |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Thu Jul 28, 2005 6:32 pm Post subject:
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I know how it is. I wish I didn't have to sleep but if you've ever seen the Seinfeld where Kramer tries to sleep only 30 minutes every four hours it shows what a bad (if very funny) idea it is. I pick up my axe at least once a week just to make sure the muscle memory is still there. I wanna play more but what can a brother do. There are too many projects and too little time. And then there is my day job... that really gets in the way
Cheers
Ray _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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Wild Zebra
Joined: Apr 28, 2005 Posts: 806 Location: Ohio
Audio files: 5
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Posted: Fri Jul 29, 2005 7:44 am Post subject:
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So I built this Circuit last night and I'm having some issues.
No subs just a 2 resistors in parallel to make a 330K
My SL is patched here the patch: LFO to S&H in- CV out of S&H to CV of OSC 1
Syptoms:
-When I plug into OSC CV it pitches the OSC up dramatically
-Its hard to get the S&H dialed in(but it works)
-It won't work with the sound source
IMPORTANT- I added a 1K resistor to my CV out, not sure if I was supposed to, but in the Patched version it shows this on all the outs.
UM and The pot is where I thinked I screwed up here is how I wired it up
oh yeh and when its not in the oatch and you turn the pot it effects the OSC, it drifts as you turn it
thanks I hope I get it figure out. It sound real nice when it works _________________ "your stripes are killer bro" |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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Posted: Fri Jul 29, 2005 5:30 pm Post subject:
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So I built this Circuit last night and I'm having some issues.
No subs just a 2 resistors in parallel to make a 330K
OK
My SL is patched here the patch:
LFO to S&H in- CV out of S&H to CV of OSC 1
Syptoms:
-When I plug into OSC CV it pitches the OSC up dramatically
Yes this happens because the output of the S&H is biased above ground.
You can try decreasing the value of R16 to cause the output bias to
go lower. (try going down in increments of 50K ohm). Also I turn my
Sound Lab pitch pots way down when playing with the sample and hold.
-Its hard to get the S&H dialed in(but it works)
??? Do you mean dialing in the pitch pots of the Sound Lab or what?
-It won't work with the sound source
??? Do you mean noise source? It should mine does.
IMPORTANT- I added a 1K resistor to my CV out, not sure if I was supposed to, but in the Patched version it shows this on all the outs.
No problem.
UM and The pot is where I thinked I screwed up here is how I wired it up
The pot looks correct from your diagram.
oh yeh and when its not in the oatch and you turn the pot it effects the OSC, it drifts as you turn it
This should not happen...? Check all of your wiring. How new are your batteries? If you are on a power supply you should not have any interaction at all.
thanks I hope I get it figure out. It sound real nice when it works
Let me know if this helps.
Check the latest info on the page and make sure you use CTRL-Refresh with your browser so you don't get an old cache of the page. _________________ There 10 kinds of people in this world that understand binary those that do and those that don't. |
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Wild Zebra
Joined: Apr 28, 2005 Posts: 806 Location: Ohio
Audio files: 5
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Posted: Mon Aug 01, 2005 7:31 am Post subject:
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Well haven't made it any further I actually took a step backwards. MY LFO WENT OUT . I think I burned a chip?
Quote: | When I plug into OSC CV it pitches the OSC up dramatically
Yes this happens because the output of the S&H is biased above ground.
You can try decreasing the value of R16 to cause the output bias to
go lower. (try going down in increments of 50K ohm). Also I turn my
Sound Lab pitch pots way down when playing with the sample and hold. |
good that answers that question
Quote: | Its hard to get the S&H dialed in(but it works)
??? Do you mean dialing in the pitch pots of the Sound Lab or what?
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sample rate of the S&H
Quote: | It won't work with the sound source
??? Do you mean noise source? It should mine does. | oops yes I meant noise
Quote: | oh yeh and when its not in the oatch and you turn the pot it effects the OSC, it drifts as you turn it
This should not happen...? Check all of your wiring. How new are your batteries? If you are on a power supply you should not have any interaction at all. |
fresh batteries
thanks Ray
I think when I get my LFO working(cross my fingers) I'm going to wire it up with a rotary switch like on your page and just have the trigger and CV patchable.
I was wondering do I have to make new patch points(if I wanted it patchable) for the ins. Like for LFS AR2 and NS2, because they appear to be different than the normal patch points. Hope thats not confusing. _________________ "your stripes are killer bro" |
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adhdboy
Joined: Feb 16, 2005 Posts: 57 Location: denver
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