100khz osc
it's not to do music for my dog ! 
just to do a 1:1 emulation of the arp pro soloist OSC . It use a very high frequency osc with 6 dividers . if you mix this six pulse of differrent lenght you have a kind of saw wave ( with stairs .. ).
I have post a link where there is the arp patent for the pro soloist (on the wish list ) . the high frequency osc give pulse from 16khz to 128khz . maybe there is a better way to do the exact shape of the soloist osc ? I started to design something with my flexorized modII . it works but the osc frequency is not enough high to do lead sounds .
<font size=-1>[ This Message was edited by: spiderman on 2003-10-02 07:59 ]</font>
<font size=-1>[ This Message was edited by: spiderman on 2003-10-02 08:00 ]</font>

just to do a 1:1 emulation of the arp pro soloist OSC . It use a very high frequency osc with 6 dividers . if you mix this six pulse of differrent lenght you have a kind of saw wave ( with stairs .. ).
I have post a link where there is the arp patent for the pro soloist (on the wish list ) . the high frequency osc give pulse from 16khz to 128khz . maybe there is a better way to do the exact shape of the soloist osc ? I started to design something with my flexorized modII . it works but the osc frequency is not enough high to do lead sounds .
<font size=-1>[ This Message was edited by: spiderman on 2003-10-02 07:59 ]</font>
<font size=-1>[ This Message was edited by: spiderman on 2003-10-02 08:00 ]</font>
no indeed and even if exist our ears don't perceive it .
but in fact I need a 16khz to 136khz pulse osc followed by 6 dividers . by mixing together the output of each divider ( pulse with different lenght ) we obtain something like a saw wave ( but with stairs in it ) . it is how from a single simple pulse vco , arp prosoloist do saw wave . and from this saw wave they generate a pulse width with a saw to pulse module ( there is one in flexor ) .
sure I can use a saw osc directly . but the prosoloist osc is very particular . the pulse width modulation seems stepped etc ..
so I wonder if this kind of recreation is possible because with the pulsar at 44,1 khz I think I can have a 22.05khz pulse inside the modular but no more ? but maybe there is a clever math solution to do this etc ..
but in fact I need a 16khz to 136khz pulse osc followed by 6 dividers . by mixing together the output of each divider ( pulse with different lenght ) we obtain something like a saw wave ( but with stairs in it ) . it is how from a single simple pulse vco , arp prosoloist do saw wave . and from this saw wave they generate a pulse width with a saw to pulse module ( there is one in flexor ) .
sure I can use a saw osc directly . but the prosoloist osc is very particular . the pulse width modulation seems stepped etc ..
so I wonder if this kind of recreation is possible because with the pulsar at 44,1 khz I think I can have a 22.05khz pulse inside the modular but no more ? but maybe there is a clever math solution to do this etc ..
Spiderman, imho you can stick with your design principle and just scale down frequencies in relation.
They probably used those high rates because it was easier to keep them stable in those days.
Current oscillators are rock solid, so you'll probably end with the same result - unless the analog circuitry of the ARP introduces some special side-effects.
just 2 cents, Tom
They probably used those high rates because it was easier to keep them stable in those days.
Current oscillators are rock solid, so you'll probably end with the same result - unless the analog circuitry of the ARP introduces some special side-effects.
just 2 cents, Tom
You should be able to get almost the same effect by running a saw wave through a bit depth converter. You won't be able to get exactly 6 steps though, you'll have to quantize to either 2 or 3 bits which will give you 4 or 8 steps respectively.
The high frequencies were probably used to make anti-aliasing filtering easier/cheaper. Exactly the same principle is used by the oversampling 1bit DACs found in most CD players.
The high frequencies were probably used to make anti-aliasing filtering easier/cheaper. Exactly the same principle is used by the oversampling 1bit DACs found in most CD players.
thanks guys !
your are right astroman . arp use a high frequency osc in their design because it's more stable .
i've posted a link to the arp prosoloist patent on the devices wishlist . there is all the schematics .just all we need to do a 1:1 emulation !
component by component .
it could be amazing to have a kind of modular but instead of managing modules we could manage resistors,capacitors etc.. all the electronic stuffs . the ultimate modular !
<font size=-1>[ This Message was edited by: spiderman on 2003-10-16 08:30 ]</font>
your are right astroman . arp use a high frequency osc in their design because it's more stable .
i've posted a link to the arp prosoloist patent on the devices wishlist . there is all the schematics .just all we need to do a 1:1 emulation !

it could be amazing to have a kind of modular but instead of managing modules we could manage resistors,capacitors etc.. all the electronic stuffs . the ultimate modular !

<font size=-1>[ This Message was edited by: spiderman on 2003-10-16 08:30 ]</font>
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Well, that's SCOPE/DPOn 2003-10-16 08:25, spiderman wrote:
thanks guys !
your are right astroman . arp use a high frequency osc in their design because it's more stable .
i've posted a link to the arp prosoloist patent on the devices wishlist . there is all the schematics .just all we need to do a 1:1 emulation !component by component .
it could be amazing to have a kind of modular but instead of managing modules we could manage resistors,capacitors etc.. all the electronic stuffs . the ultimate modular !![]()
I would say you have to be extremely experienced to make a complex electronic circuit in DP. I wouldn't say it's impossible, but rather, pointless. Scematics of circuits are generally useless. DP or the Modular are in the functional domain only (like all building sofwares i know and have heard of).
There a a few parts of an electric/electronic schematic that can be reproduced in DP and that will actually look like the electronic circuit itself (some basic filters can be like that) , but how to make a circuit that use gold or silver wires rather than copper, and from which manufacturer ? for this you can emulate the sound by using various functional modules.
And yes, if there were something that would emulate all electronic parts of a circuit, it would be great to reproduce schmatics on the web, but you must have a solid electric/electronic knowledge to go beyond that...
My two cents, i'm not familiar with electronic schematics nor reproducing them (at least, not from the circuit to the function) ...... but I find the discussion interesting.
have a nice day everybody...
<font size=-1>[ This Message was edited by: spacef on 2003-10-22 14:57 ]</font>
There a a few parts of an electric/electronic schematic that can be reproduced in DP and that will actually look like the electronic circuit itself (some basic filters can be like that) , but how to make a circuit that use gold or silver wires rather than copper, and from which manufacturer ? for this you can emulate the sound by using various functional modules.
And yes, if there were something that would emulate all electronic parts of a circuit, it would be great to reproduce schmatics on the web, but you must have a solid electric/electronic knowledge to go beyond that...
My two cents, i'm not familiar with electronic schematics nor reproducing them (at least, not from the circuit to the function) ...... but I find the discussion interesting.
have a nice day everybody...
<font size=-1>[ This Message was edited by: spacef on 2003-10-22 14:57 ]</font>
exactly - the final goal is a certain soundOn 2003-10-22 10:56, spacef wrote:
I wouldn't say it's impossible, but rather, pointless. ... DP or the Modular are in the functional domain only (like all building sofwares i know and have heard of).
In the analog world it is modelleled by circuits. Simple like resistors and capacitors or complex like transistors.
In the software domain that is done by the modules of a developement system, which execute the function of a group of elements.
If one really wants to get down to basics and model the analog modelling system in software, that would be an almost infinetely complex piece of software.
The Sharcs processing power is rather high and they seem to have excellent basic functions, but still it took CW a huge effort to model something (electronically) simple as the Moog filter.
In real world the transistors of that filter had to be manually measured and selected, that's why Moog never got beyond 24db.
It was simply impossible to find enough matching pieces.
There is no way to precicely model on that level in software on any affordable machine, though I must admit that I'd like the idea, too.
cheers, Tom