Author |
Message |
zipzap
Joined: Nov 22, 2005 Posts: 559 Location: germany
Audio files: 24
|
|
Back to top
|
|
|
Uncle Krunkus
Moderator
Joined: Jul 11, 2005 Posts: 4761 Location: Sydney, Australia
Audio files: 52
G2 patch files: 1
|
Posted: Wed Jan 11, 2006 4:29 am Post subject:
|
|
|
I would probably put it through a divider (flip-flop) and then into a one-shot which had a variable length (555 timer). A one-shot is also known as a monostable multivibrator. _________________ What makes a space ours, is what we put there, and what we do there. |
|
Back to top
|
|
|
zipzap
Joined: Nov 22, 2005 Posts: 559 Location: germany
Audio files: 24
|
Posted: Wed Jan 11, 2006 6:35 am Post subject:
|
|
|
I thought of that. But the output pulse would than have a fixed length. Changing the speed of the Clock would result in changing the pulsewidth.
At fast speeds the timing poti (scaling) would have to be set in the lowest range, at slow speeds it might not be abel to give a long enough pulse even if you turn the controll to the far right.
I´m imagining a circuit that aplies variable pulthwidth at any incomming clock signal. I´m shure that the output will have to ba at half speed, as no circuit can look ahead at what is going to happen. It must be possible somhow. Aren´t there comercial Drummachines with Swingcontroll? |
|
Back to top
|
|
|
v-un-v
Janitor
Joined: May 16, 2005 Posts: 8933 Location: Birmingham, England, UK
Audio files: 11
G2 patch files: 1
|
Posted: Fri Feb 10, 2006 4:59 pm Post subject:
|
|
|
Bit of an old thread- but please do keep these ideas flowing
zipzap wrote: | Aren´t there comercial Drummachines with Swingcontroll? |
Oh yes- many. But they are mainly on the newer digital models.
I may be wrong but it seems old analogue machines (like the Boss DR-55 or TR-808 for eg) have there own swing which is based on the manufacturers attempt to create triplet programming. (My dr-55's swing is really funky! It got that rocky John Bonham Led Zeppi hip-hop sound. It's just a shame that its sounds are a little weak.
There was an excellent Nord modular 1 patch demonstrating this use dual clocking a few years back |
|
Back to top
|
|
|
toppobrillo
Joined: Dec 10, 2005 Posts: 766 Location: oakland, ca
G2 patch files: 1
|
Posted: Fri Feb 10, 2006 8:00 pm Post subject:
|
|
|
Quote: | But the big question is: How can i get a steady pulse from my midi-clock device to become a variable pulsewave (with maybe half the freq)?
|
hey what about a 'fixed' integrator with clocked reset to a comparator? at high frequencies [resetting faster] the amplitude at reset would be lower than it would be at low frequencies.. i.e. less or more time that the comparator is high [or low or whatever].
this is one solution perhaps?
[/quote] Last edited by toppobrillo on Fri Feb 10, 2006 8:08 pm; edited 1 time in total |
|
Back to top
|
|
|
Uncle Krunkus
Moderator
Joined: Jul 11, 2005 Posts: 4761 Location: Sydney, Australia
Audio files: 52
G2 patch files: 1
|
Posted: Fri Feb 10, 2006 8:02 pm Post subject:
|
|
|
Yeah, I'm pretty sure the TR707 had something like that. You turned it on or off and gave it a value, and it affected the whole pattern. And yeah, it still had the problem of weak sounds, but at least it had individual outs which could be used to trigger external modules. |
|
Back to top
|
|
|
Uncle Krunkus
Moderator
Joined: Jul 11, 2005 Posts: 4761 Location: Sydney, Australia
Audio files: 52
G2 patch files: 1
|
Posted: Fri Feb 10, 2006 8:11 pm Post subject:
|
|
|
There's also a variation on the 555 astable/monostable circuit which charges through one diode/resistor and discharges through another diode/resistor. This way you get complete control of the duty cycle and you can also add an overall frequency pot.
I forget where I saw it now, but I've got a feeling it was being used as a servo motor testing unit. I'll have a bit of a look around and see if I can find it. _________________ What makes a space ours, is what we put there, and what we do there. |
|
Back to top
|
|
|
toppobrillo
Joined: Dec 10, 2005 Posts: 766 Location: oakland, ca
G2 patch files: 1
|
Posted: Fri Feb 10, 2006 8:32 pm Post subject:
|
|
|
yeah i have definitely done that with a 555 at some point prolly in an attempt to use it as the core of a single supply linear vco, which i guess the PAIA [and rene schmitz?] does with the fatman successfully.
this thing i was talking about would be a frequency coincident P.W.er ..if that is a preferable means of P.W.ing...
the range might be a little shy as the core circuit base, but with a little logic, it could definitely be expanded into ultra/sub audio territory.
that scott gravenhorst has some supercool but simple ideas for those vcos! check those out i think you guys would dig it.
actually yeah, a PLL would do it well. |
|
Back to top
|
|
|
zipzap
Joined: Nov 22, 2005 Posts: 559 Location: germany
Audio files: 24
|
Posted: Sat Feb 11, 2006 6:55 am Post subject:
|
|
|
Hi guys nice to see this thread again.
Quote: | hey what about a 'fixed' integrator with clocked reset to a comparator? at high frequencies [resetting faster] the amplitude at reset would be lower than it would be at low frequencies.. i.e. less or more time that the comparator is high [or low or whatever].
this is one solution perhaps?
|
I´m afraid i don´t understand - at all. my knowlege in electronic basiscs is limitded like lenny kravitz´s voice. (in his case i like it).
I recently build my clockprocessor that can controll all my modules and add swingfeel. I used the aproach i first thought of, a 4047 monostable vibrator is beeing triggered by the clock. A pot and a cab define the pulsewidth. The 4047 brings it own inverted output, so i just have to form q and q- into short pulses and or them together. the oring is done in each device (sequencers, s/h, etc) via swiches and diodes (use a pulldown r) so that i can have downbats, offs or both. This is always followed by on divide by 1-10 (4017) which makes it realy interessting. Works.
There still is the problem with changing the clock speed.
2 things about that:
1. If i realy want to use a modulated clock this thing is useless (in the meaning of fixed swing feel- results may be interesting anyhow).
2. more often the clockspeed will not be modulated. for different ranges i can swith in different cabs, so one pot gives controll over very short to very long delay.
The nice thing in reality is what i thought would be the problem of this method. (´s often like that, isn´t it). When the pulsewidth of the 4047 gets longer than the clock you get a divide by kind of thing. this resullts in one long note (more than one beat) and a short one. This gives you the typical samba pattern for example. |
|
Back to top
|
|
|
|