Korg Delta

Underrated in its day, a 'string machine' with a synth section as well. It has several strengths such as full polyphony, simplicity and instant layered gratification. Plus a unique sound somewhat like a cross between an organ and a synth, possibly due to the synth section having additive square oscs w/ sliders like a drawbar configuration (16', 8', 4' and 2').

....character makes up for simplistic synthesis

Delta

delta.jpg (53.65 KiB) Viewed 10865 times

The original never had MIDI or patch memory, so bringing it into a modern day replica with these added, could be popular as Im reasonably sure it hasnt been done yet (except maybe only sample sets ?). I would pay as much for this as any mid range Zarg synth.

Underrated in its day, a 'string machine' with a synth section as well. It has several strengths such as full polyphony, simplicity and instant layered gratification. Plus a unique sound somewhat like a cross between an organ and a synth, possibly due to the synth section having additive square oscs w/ sliders like a drawbar configuration (16', 8', 4' and 2').

....character makes up for simplistic synthesis


The original never had MIDI or patch memory, so bringing it into a modern day replica with these added, could be popular as Im reasonably sure it hasnt been done yet (except maybe only sample sets ?). I would pay as much for this as any mid range Zarg synth.

I never listened to this toy.
Does it sound very different or better than a ARP Omni or Quadra ?
I had all kind of string machines in the past, ARP/Solina, Roland RS ?, Logan String Melody and Yamaha SS30,- but the only I really wanted, the Freeman String Symphonizer, was never available in my country.
None of these had a "synth section" though ...

Bud

Doubt it sounds like either of those. I'll post something on SoundCloud later from the '80s.

Meanwhile go here to hear : http://www.soundboard.com/sb/Korg_Delta_sounds.aspx Sounds 5,6 and 15 remind me most of it.

Also it featured in this jam I posted here http://soundcloud.com/hitfoundry/hanging-in-the-window a while back, dueting w/ a JP4

Specially it had a trigger socket on the back that I hooked to an 8 bit computer pumping out some rhythmic pulses - very unique sounding.

Doubt it sounds like either of those. I'll post something on SoundCloud later from the '80s.

Please offer a download,- since some time, Soundcloud doesn´t work for me anymore, all echoed, pops ´n clicks, halftime.
Don´t know what it is, but on other websites using Souncloud player, it works.

Meanwhile go here to hear : http://www.soundboard.com/sb/Korg_Delta_sounds.aspx Sounds 5,6 and 15 remind me most of it.

Just had a listen,- now I know how different it is compared to the other string organ desktop-hooters !
Has personality and the filter sounds quite good.

I wonder if that can be done in Modular though.

Also it featured in this jam I posted here http://soundcloud.com/hitfoundry/hanging-in-the-window a while back, dueting w/ a JP4

Soundcloud,- see above ...

Specially it had a trigger socket on the back that I hooked to an 8 bit computer pumping out some rhythmic pulses - very unique sounding.

Bud

Here a few bars of a bassline done on Delta with a Delta organ like sound playing a melody also. Theres a crappy drum machine in background.

[The extension mp3 has been deactivated and can no longer be displayed.]

dante can you sample from c2 every 6th note to c6 for each osc and every draw bar stting 32 16 8 4

and ill make a modular patch of it for every one

im doing the logan string and the roland vp330

can you just do dry samples no res filter fully open no modulation

and im also doing the dk synergy 2

at the moment im using multipul sample osc for the multisound so that its sound more accurate

its a pity that the sample osc does not use a multisample keyboard placement in one sample osc

but i am planning on implimenting one when scope 6 comes out or even a sf2 or sfz container sample osc which can read these keymap formats

its alright dante i have loads of korg delta waveforms

i just looked through my collection as i have in the past had use of a synth museum in bristol which had some good old synths that i got to play with

and i sampled the korg delta osc at varying draw bar settings

i have about fifty waveforms

i will create a modular patch on the same synth params but with 4 sample osc for the 16 8 4 2 drawbars and noise with a sample pool of the 50 waveforms

which can be added additivly and the dual filter will be a multi mode poly filter so you can extend the sound pallet and i will also add a filter for the string section

which the delta does not have as the sound source of the string section comes from the 16 and 8 draw bars and there is a balance control that mixes or fades between the 2 draw bars i think here i will add a crossfade modulator which will give more morph controlover the string section coupled with a filter will become a pad synth section

on the delta there is one envelope for both the vca and vcf with an envelope amount control for the filter modulationi will add a envelope for each this will give more possibilties of sound

the string section has an ar envelope for the vca which i will keep but will add an envelope for the new filter added for the string section

there are 2 simple lfo 1 is mg and the other is vibrato mg is used for the filter for wah wah effects and vibrato is for fm of the draw bars pitch

i will use 2 multi lfo for more variation

i will use an xy controler for the joystick control of pitch bend and vibrato and filter modulation wah wah or wobble as most seem to call it today

im also going to the final mixer section which will be 2 vca 1 for synth 1 for strings with level controls which will have crossfade contol modulation

then pan contols to each synth section and then to a chorus for each section then to a reverb fx then out

i think this will add bells and whistle to the original design but made hard wired so people can just tweak the basic items with out having todo any wiring

That would be cool JHulk, I cant sample it since I havent had access to it since the 80's - what Im posting are just old recordings and not many single notes by themselves (I tried that plus a 'D-String' VST but no good.

If u can make one that would be unreal !

And also once again prove the power of Scope.

i just looked through my collection as i have in the past had use of a synth museum in bristol which had some good old synths that i got to play with and i sampled the korg delta osc at varying draw bar settings i have about fifty waveforms

Awesome ! (lucky)

i have about fifty waveforms

i will create a modular patch ...

You kill !
Awesome !!!



Bud

write i have built it now im doing some presets for it then will upload for the community

becuase this is a sample based instrument the waveforms are from the 4 sound generator partials it uses square waves at 16' 8' 4' 2'

i have used the same partial generator sytem but becuase the start waveform is from the 5 sections of the korg delta sound generator

the new sound generator uses these generated waveforms so the spectrum will be much more than the original

to make it even more exciting the sound generator can use any waveform so the spectrum complexity will be even greator as you are additively adding the volume of the waveforms at octave intervals

as each partial generator doubles in frequency

there 50 sampled spectrum waveforms to choose from from a sound pool but i can add more sound pools from other synths so that a wider range of spectra can be used

the sample osc are set so no need to change the pitch they are set correctly for the root key and the tuning setting all you have todo is place the spectra sample thats it

all wiring is set so no need to change any wiring so its just a matter of tweaking the generater volume sliders and filter envelopes and vca envelopes for synth section

and the crossfade section of the string section and its envelopes for filter and vca

the string section gets its spectra from the 16' and 8' draw bars from the generator section the cross fade is used to adjust the amount of the 16' and 8' spectra

this then goes to 2 final mixer section 1 for synth and 1 for string which you can adjust to get the amounts of each part you want this then goes to the panning modulators and then they go to 2 poly2 outs each section has its own chorus effect then the left outputs from each chorus are added together and so are the right outputs then they go to an stereo insert effect

if used sc rmx160 reverb but any can be used

the modulation section i used roy thines midicv module which has built in pitch wheel and mod wheel direct outs all the mod 2 input for filter modulation of synth section are fully on as as this is controled by the mod wheel and the mg lfo which goes to a level control this then goes to a linear vca which its mod input is controlled by the modulation wheel

the frequency setting of the lfo is set by the lfo module but the mg amount is controlled by the lfo level and the modulation wheel opens the vca for o-full modulation

the vibrato is the same type of circuit all the pitch mod of all the sample osc are set fully on as this is controlled by the pitch wheel and the mod wheel

the lfo for vibrato is the same circuit as the mg section but the vca output goes to a modulation mixer which the pitch wheel controller goes to and the vibrato the actuators are fully on as the mod wheel and the pitch wheel control ammount i did it this way as most people have controller keyboards that have mod wheel and pitch wheel and not the x-y joystic that these older korgs use


i have also made a roland vp330 modular patch

this has 3 sections

1 section is ensemble this has 2 partials 1 male choir 8' and 1 female choir 4'

2 section is saprano this has 2 partials 1 male solo 8' and 1 female solo 4'

3 section is the strings this has 1 partial

by adjusting the partial levels of each section you can create great pads choral in nature

for my creation i have added some bits 1 filter per section 1 amp per section this gives the ability to create transients for each section with its own filter type as on the original it was just mixed into 1 filter i have used the poly filters as you can add phazers and chorus and comb filters this way adding to the the sound pallette

then it will go to panning modulators for each section then poly out to a phazer on each stereo channel then all the left channels are added together and the right then it goes to a delay then an stereo insert effect reverb

all modules are from the standard mod 2 and mod 3 and roy thinnes modules so every one should be able to use these modular patches in version 4 or 5.1

the samples for the vp330 are from multisamples but becuase of the single sample nature of the modular sample module i have used c5 for all it will be great when a multisample sample module is available

i have sample sets for the logan string 1/2 bigband poly chrom and variuos other string synths and will do modular versions as soon as i have time

write i have built it now im doing some presets for it then will upload for the community

Pics or it didn´t happen ...

Just kidding !

i have also made a roland vp330 modular patch

Man,- that all sounds damn GOOD !!!
Unbelievable and extremely generous you´re offering these devices !

Can´t wait to hear ´em.

Bud

Sounds like could be a Korg Delta++ with the extended waveform spectrum. And the Roland VP330 stuff as well !

Awesome !! Cant wait try it all out

had a few problems getting the roy thines mvc todo pitch wheel properly and the modulation cc was not working with the mod wheels 1 and to

so i have reverted to the modular 2 mvca and its working correctly now

the vibrato and mg filter control are now done by constant value modifiers going with midi 1 and 2 i have done it like the korgs joystic controls push forward it modulates the filter cutoof lfo amount

and pull done it does vibrato fm lfo amount and going in a circular motion playing bass stabs is really great

i have changed the structure a bit i have added an extra 2 sample osc 16 foot and 8 foot just for the string section

as before i took them from the sound generator 16 and 8 partials

the reason i have done this is so you can have totally different waves for the string section

also added some extra gains as the levels was queit

the vibrato and mg for filter are only for the synth part like the original as you can set a nice bass transient with fm modulation or filter lfo modulation

with a unmodulated string section

the vp330 is going to be its own modular patch

and im going to do a choir synth with my spectra samples that i did for the solaris

i have just got to add all information boxes explaining all of the sections and ill release it have not had time todo any presets ill leave that upto you

best preset compitition just for fun its sounds great and playing with the fm of pitch and fm of filter via the joystic controls is great if you own a korg m1 t1 01w x series n series trinity triton oasys kronos as they are already set up for pitch on x and +y is cco1 -y is cc02 which is what i have set the 2 constant controls at

i can get 10 note poly at about 30% of my 36 dsp system for this module

10 note poly is more than enough for me (on the Delta emu) . I'll just use a couple of instances at a time no more than 7 poly at once.

Thanks for awesome work.

i have rearanged the synth now in a good flow

control is at the top then theres the synth section

then the string section with the 2 additinal sample osc

and the output section

i have removed the fx insert as it is better to do it at the mixer as i was using a celmo tape delay on the last set i was doing

so removed it as others might not have this device

everyting is set as it should be all the cables are were they should be

have writen bold text so you can see each section

i have been messing with sounds and got some nice stab piano string sounds

you can get nice bass sounds just by using one generator as they are complex waveforms but the fun comes when mixing the generator levels and noise for the synth section while having a nice modulated crossfade of 16 foot and 8 foot of the string section coupled with the pan effect sounds great

im nearly done and ready for upload but i have problems uploading 7zip files

ok im going to release it now

its time for you to have a play and make some noise i did 2 basic presets

ill leave the rest up to you

modulation modwheel 1 cc01 is filter mg this you set in the control section to do filter sweeps or sample and hold or wobble type effects

modulation wheel 2 is cc02 if for vibrato and wierd fm effects

just add the wave forms for each sound generator you can make noise from just 1 generator for basic bass and lead sounds but by adding the sound generators at different levels and adding noise you can create very complex sounds and with the poly filters you can create all type of sounds spectra

the string section has no modulation control at all but has a crossfade control and panning control so if you have a nice lead sound layers with the strings you can pitcj fm and filter fm the lead and the string will not be modulated which lends to great types of vangelis type sounds as you can do pitch arpegs using the vibrato pitch fm and swap to fm sample and hold of the synth filter



enjoy and i will be doing a full string synth collection

its all self explained by the labels

codes of colours of the cables

blue = note and sample frequency cables
green = velocity cables
yellow = all gate signal cables
red = all audio signal cables
orange = all esync cables
purple = all modulation signal cables

bud the roland rs?

there was a roland rs202

i have that string machine sampled

ill addit tothe string synth collection im doing

there will be about 8 string machines done korgdelta was the first

I think my Sample Oscillators on X64 might be funky.
I dl'd the Modular patch, very clean design BTW, and lowered the voices from 10 to 4 so I could dig into the Sample Oscillators and see why I have skipping/missing notes when I play.

Before I go wasting anyone's time at SC, anyone with the XITE-1 try loading this and see if I am doing something wrong.

Thanks JHulk, and BTW the Solaris Vocals are most excellent.

i think its a modular problem i had the same thing when reloading the project with the 10 voice poly

bug in 5.1 i think

i have to revert to 1 voice then go back to setting the poly amount

and it works correctly im also having issues with presets i did 30 presets for it took me about 4 hours and when i tried to go through each one it would not load

and when i reloaded the project it comes up with 98.5% incompatible never had this problem before and getting nil pop ups when trying to load presets

... and see why I have skipping/missing notes when I play.

Yes I have the same problem, it is like that one note stucks directly after you load the device. Jhulks hint to toggle down to one voice only and raise it again works.
I made some devices with the sample OSCs / Pool in my Scope past and I always had problems with them, they work in yours fine so far.

Also I had the problem with the presets, it is so frustrating when you finished a device and start to program it, after all is done the device / preset list don't work as it should.

I guess that the ,not loading of presets, has to do with the Sample OSCs, I think that their state are not correctly saved in a preset, and I remember slightly that it was a problem of the stock sample pool module. There is a alternative sample pool module from John Bowen on Z, here from Ben Walker for his JD 800 version. It is a standalone device. https://www.scopeusers.com/Pulsar/files/mod ... dalone.zip

Maybe worth a try

Thanks CW.
I went from 10 down to 4, I should have gone to 1 I will try that.
Then I can use the vast folder of samples I have collected too.
I sort of gave up on x64 Sample Ocillators when I found trouble in SYnthskool.
But it would be great to have them working with some new work around....


Ankyu

Nice patch. Loaded it into modIV and started playing around. I got the prob with not all notes triggering. On load, I turned ther volume of some of the Oscillators down because I found a major third was playing on a single key. Soon managed to isolate and re-tune oscillators.

Will try out all the various waveforms next.

Great stuff.

its definetly something wrong with the sample osc you need to switch down to 1 voice then back to the poly ytou need

now there is another way i can just send the wav files in a folder and place that were the device is and then load them that way maybe doing presets will then

work

as the 30 presets i did were wicked and you can get some very complex scapes from this device

but wasting 4 hours on them for them to be lost to time and space is just a shame

i wish i had written them down on patch saheets the good old way at least i would of remembered how i did them thats modular synths for you

if you dont write it down or sample it its gone

its definetly something wrong with the sample osc you need to switch down to 1 voice then back to the poly ytou need

Yes that works !

now there is another way i can just send the wav files in a folder and place that were the device is and then load them that way maybe doing presets will then work

Yes that would be good, and then allow us to load each osc with any of the waveforms to experiment. EDIT - I just found out how to do that w/ Drag and Drop from Sample Pool list !!!

as the 30 presets i did were wicked and you can get some very complex scapes from this device but wasting 4 hours on them for them to be lost to time and space is just a shame

Yes that would be frustrating.

Anyway at least we have something to noodle around with, getting close to the Delta !!

Thanks again.

i have always done the drag and drop from the pool

otherwise it would be pointless in having a sample pool if you cant get at the files

dante ill do the pool as samples in its own file

and as using the jd800 pool as thats supposed to use zarg sample pool

either way i will nail this in the but so that it can do presets

but i think the sample folder pool will be better as then the dev file wont grow every time we do a preset

i have been making modular modules for 20 years and diy synths

and i repair all makes of synths and samplers aned do new upgrades to old equipement

we are curently making new pcm cards for the m1 t1 wavestation as the soft version just dont sound the same

i have been producing sample sets for the last 22 years and you might of heard some of my creations in ensoniq hardware

we will sort this out before i release my other modular devs

i have always done the drag and drop from the pool otherwise it would be pointless in having a sample pool if you cant get at the files

Yeah my bad for not reading the manual

Anyways look fwds to developments

Hope a re-install fixes your delays and reverbs.

delete the sound pool ill upload a new folder this has the dev file and the sample folder pool

presets work ok like this and dont add to the size of the dev

so the answer to the sample problems is dont use sample pools as they are buggy

cuases problems with presets

now i dont know if this also cuases the same problem for the poly

but i can now do presets ok no more wasting time

the dev will be only 1 note poly so that it works from the batt then its up to you to do the amount of poly you require

now lets make some presets

no need for work arounds any longer just use a folder make a folder of the devs name put dev in that folder open folder make another folder with the name of the samples put your samples in this folder now when distributing this file zip the folder and all the files will be where they are supposedf to be

now unzip folder in devs folder choose the modular 2 folder and unzip there

now when you are on the main place for choosing the devs goto the mod2 folder and there should be a folder of the korg delta on roids then a open box comes up with the dev just like when going through the patches

choose the dev and it will load up now when you press on the L button to load samples it will automatically come up with the sample folder just load the sample

and your away no need to search as its set up that way on my system

hope this makes it easier for everyone and all my modular patches will be done like this from now on as its the easiest way and simplist with out any problems

have a nice day its actually sunny here for the first time in 3 months with out rain

here is the dev in the folder zipped just unzip

into your devices folder in the mod2 folder

the presets work ok now



if there still any problems let me know

Thanks jhulk, I will try out next time I am in studio, and create some explanations in ScopeRise. Then make/use presets for music

i just looked through my collection as i have in the past had use of a synth museum in bristol which had some good old synths that i got to play with

Is this the museum ?

http://jonathan.miller4.users.btopenwor ... orrell.pdf

yes andy horrel

he owns emis music shop in an old church

i brought a lot of my gear from him all my quasimidi gear

my mackie analog desk

and various bits and pieces

he has some great synths the syrinx not seen many of those about

and his roland 100 modular

Yes 2 x pics of Roland Modular on page 4, and the EMU Modular as well (I didnt know EMU had a Modular) - not to mention Fairlight CMI. And amongst all that Analog, he says his favourite is a DX1 !

Awesome stuff, if I ever go UK I MUST see this museum.

yes emu were famous for there modular synth thats what made there bread and butter before they did samplers

they invented the polyphonic keyboard which the prophet5 used

they invented all the custom synth chips the ssm range by dave rossom

he also invented the h and g and e chips

which were used in the emax 1 and 2 and the e3x and the ultra series which uses 2 of these h and g chip for the zplane filters

all the filter and other synmth chips were designed on the emu modular first

then they let them be used by other companies

sequencial had to pay royalties for the stuff they used from emu the biggest cost being the polyphonic keyboard

yes if you go to his shop which is just outside bristol in mangottsfield which is in the bristol county

you just after ask him to have a look and he will take you up there as its in the roof of the synth shop

as i used to buy lots of stuff from him i went up there a few times in the 90,s and sampled a few nice things he nver had the dx1 then other wise i would of sample it to death that thing has poly aftertouch and you can layer patches it has the best dacs and its crystal clear

the syrinx is a great synth he had that back then i sampled that and his modulars he has a massive moog and roland 100 and 700

it was also becuase of him that a brought a matrix12 as he was showing me the modulation potential on sound you could create complex modulation that you could play a pad sound that evolved over 2 mins

he also showed me how to use a lfo in time with a bass drum on a gem s2turbo that it synced in time and would make the drum thud

i brought my first pulsa2 from him in 2000

and i brought the best ever controller keyboard the quasimidi cyber6

and still use it today as it has the best programmable arpegs ever you can have upto 32 midi channels triggering and its great for those trance effects

it has a 8 track sequencer with groove swing like the mpc60

as i used to buy lots of stuff from him i went up there a few times in the 90,s and sampled a few nice things he nver had the dx1 then other wise i would of sample it to death that thing has poly aftertouch and you can layer patches it has the best dacs and its crystal clear

Yes, only 140 of those DX1 ever made (less than Solaris?). If he got one now, he's a lucky man.

JHulk, this patch is good. I made a demo :

http://soundcloud.com/hitfoundry/modular-korg

Its damn close to the original, not quite the same in the bass, but pretty damn good in mid range, close for a sample based model !

nice patch sounds great

the problem with the bass end is that its only one sample

for it to have really good deep bass i need to use c2 samples minimum

i can doit with 3 multisamples but it would mean 18 sample osc

as you need 3 sample osc for each section then you have to set each one to a keyboard range

if you want to try this version let me know as i can make a version with the 18 sample osc

but dsp load will be higher

i will do it that way for the vp330 as the samples will be permenantly set you wont need to change them

glad you like it look forward to hearing some more of your preset collections

isn't the synth section of the korg delta, based on 4 square oscillators divided in 4 octaves?

Why don't you replace sample oscillators with square ones?

yes that can easily be done

but i sampled the settings of the sound generators at different levels

you could also swap the sample osc for the wavetable osc

which has many variations of waveforms

the patch works nice and you can get some nice sound scapes

i see it's great to make sounds with your modular patch, i'm interested in the emulation, but there isn't much information around the internet about the korg delta, so i have found a couple of reviews and the manual, where it is supposed to be paraphonic and it uses one only square oscillator and flip flop circuit to do the harmonic split.
They wrote that the oscillator is square, so i pointed out that your wavetables aren't squares, but maybe the summing result of multiple squares at different pitch, so it would be interesting to record the clean out of each of the synthesizer section(let say, filter is bypassed and one only signal generator at a time).
This is just for the sake of 1:1 emulation.

your write a lot of the waveforms are not squares

its to do with the octal ranges and the noise and the filter

i have done lots of sampling of analog synths and the variation of square waves and saw and tri is so vast no square wave is the same from each manufacturer

its not like additive synthesis where you can get perfect square waves or saw the more patials you use the great the waveform

they used crude shaping circuitsd on sin waves or saw waves to get a square

its not supposed to be a 1 to 1 emulation as i never just sample the osc on there own i sampled many variations of the sound generator and noise

its taken the idea of octal sound generation of osc waveforms but using more complex waves as used in this config you generate even more complex waves

coupled with the poly filter with different types you can create sounds that the delta cant as its limited to lowpass filter

and the string section i have added there own osc and filter which is not on the delta

what i was aiming for was the flow of the delta but brought upto date with the things we have at our disposal

im glad you like it but its still in developement

and dante is helping me as it was his original idea as we want to get it as good as possible

any feed back also is welcome thanks or proposals thanks

It wont be a perfect Delta model, in some ways it will be different or have added features, but I will be able to use it compositionally in that it will play the same role (as what I used the Delta for in the '80s) and sound like one when blended into a mix, even if your ears can tell its not quite the same standalone.

There are 2 sonic features I'm after mainly :

1) The unique 'synth - organ' type pad
2) The growling synth bass

then additionally

3) New sounds the Delta couldnt do, but still unique from other synths.

I think we already achieved 1) and are working on 2). I havent explored 3) much yet but the potential is there.

Hi,
Maybe I'm missing something, because I didn't read every line in this thread, but I can't find the Korg Delta file.
Is it still downloadable anywhere?

Thanks in advance.

its being updated to use multi sample osc

and i have added to the structure of it

making it paraphonic

and also i added wave forms from the different variations of the draw bars

which gave it a bigger sound pallet but because of the problems with the 1 sample osc

when doing bass sounds because the samples where played slower they lost there transient attack

but are much better with the new multisample osc and so i can use the full sample multisamples i recorded

i will also add the standard square wave of the draw bars

its being updated to use multi sample osc

and i have added to the structure of it

making it paraphonic

and also i added wave forms from the different variations of the draw bars

which gave it a bigger sound pallet but because of the problems with the 1 sample osc

when doing bass sounds because the samples where played slower they lost there transient attack

but are much better with the new multisample osc and so i can use the full sample multisamples i recorded

i will also add the standard square wave of the draw bars

Thanks for the explanation jhulk.

Yeah the new multisample osc version will be great. Interesting to take a look at when you're finished jhulk.

paraphonic - thats a good one - !! I want to be one of the first to own a paraphonic synth !

What happened to the Delta patch? I've been looking to recreate a string synth in modular, and thought I'd start here. And maybe create he oscillators from scratch instead of samples if helpful.

The link is still down the bottom of the title page here :

http://www.hitfoundry.com/issue_16/del_mast.htm

Thanks Dante!