synthesizer kx modular system 1

stylus02 · Jan 17, 2008, 06:50 AM

the kx modular system

actually are included 29 modules like kbu's, vco's, vcf's, vca, waveshapers and effects. it can be played via midi.

have fun!

the look:
http://freenet-homepage.de/stylish-stylus/kxm_mini.jpg
(you see a minimoog structure)

latest version:
v1.2: http://freenet-homepage.de/stylish-stylus/kxm_v1.2.zip

useful things:
hubi's midi transformator v0.8, midi loopback
MIDI programs
midiox, midiyoke can route very flexible (e.g. uart --> yoke1 & kxcontrol & kxsynth..)
MIDIOX

additions:
russ helped me by developing these things.
http://freenet-homepage.de/stylish-stylus/kxm110.da
http://freenet-homepage.de/stylish-s...m120_3538m.kxl
http://freenet-homepage.de/stylish-s...xm120_3541.kxl

sound examples:
http://freenet-homepage.de/stylish-s...ly800_bass.mp3
(drums: kxm- samples, bass: kxm midi)
http://freenet-homepage.de/stylish-s...m_arpeggio.mp3
http://freenet-homepage.de/stylish-s...nce_pre_01.mp3
(pad: kxm midi, rest kxm- samples)
http://freenet-homepage.de/stylish-s...ox4_pre_01.mp3
(offshore fx: kxm- realtime, rest: kxm- samples)
http://freenet-homepage.de/stylish-s...arp_pre_02.mp3
(kxm- samples)
http://freenet-homepage.de/stylish-s...m_resample.mp3
(hookline: kxm midi, drums: don�t know (maybe sf2))
http://freenet-homepage.de/stylish-s...m_30_aaaah.mp3

more examples:
kX Stuff 2
(by russ, all kxm played except drums & guitar)

please report incompatibilities

stylus

**dj_stick** · Jan 17, 2008, 07:57 AM

that's pretty sweet
i remember suggesting something like this a few years back, but have no idea how to code

stylus02 · Jan 17, 2008, 09:13 AM

yes, it has a little complexity.

stylus02 · Jan 17, 2008, 10:18 AM

module list

kxm 100 - 3 octaves keyboard unit (midi support)
kxm 150 - universal divider (usefull as octave divider)
kxm 160 - universal 4x multiplier (usefull as octave multiplier)
kxm 200 - multi vco saw, spaced saw, triangle, square, pulsewidthed square (aliasing)
kxm 210 - multi vco saw, supersquare, triangle (aliasingfree!)
kxm 220 - white & pink noise
kxm 300 - 4 channel mixer module
kxm 310 - 8 channel mixer module
kxm 320 - 6 channel mixer module
kxm 330 - 2 channel mixer module
kxm 400 - adsr envelope
kxm 500 - MOOG Lowpass -24 db/oct
kxm 510 - state variable filter -12 db/oct
kxm 520 - double MOOG lowpass -48 db/oct
kxm 550 - -6db/oct lowpass filter
kxm 560 - -6db/oct highpass filter
kxm 600 - standard vca
kxm 700 - multi lfo saw, spaced saw, triangle, square, pulsewidthed square
kxm 800 - resampler 1-24 khz
kxm 810 - waveshaper logaritmic, exponential, cut
kxm 820 - ring modulator
kxm 830 - bit crusher 8..1 bit
kxm 900 - unisono module
kxm 910 - phaser module

stylus02 · Jan 18, 2008, 04:50 PM

hi all,

i made a little demo sequence with the kx modular. all you hear is kx- powered (synth, samples, effects, dynamics) except the sequencer work. it came dry out from reason 3.0 through 6 asio channels.

http://freenet-homepage.de/stylish-s...arp_pre_02.mp3
http://freenet-homepage.de/stylish-s...ason_setup.jpg
http://freenet-homepage.de/stylish-s..._dsp_setup.jpg

sounds/samples: kx modular system 1 (prerelease version)
effects: efx-reverbstation, space'80, microchorus, microdelay[x]
dynamics: 10 band eq, dynamic processor

stylus

Russ · Jan 19, 2008, 08:17 PM

Sounds good

stylus02 · Jan 20, 2008, 11:08 AM

another fine tune made today with kx modular

http://freenet-homepage.de/stylish-s...ox4_pre_01.mp3

sorry my upload limit is 1.5 mb

stylus02 · Jan 20, 2008, 02:35 PM

thanks russ. welcome back in the 70's.

Max M. · Jan 20, 2008, 03:32 PM

Yeah, to me these demos sound pretty cool too.

stylus02 · Jan 20, 2008, 04:46 PM

"the beginning is the sound. and sound comes from the audigy."

but we should not forget that "reason" as "sampleplayer" makes the groove. so we use best from both worlds.

ps: next time i try max's ufx reverb

Russ · Jan 21, 2008, 04:51 PM

I have been having fun playing around with these plugins (using MIDI-YOKE/MIDI-OX for automation), but they use quite a bit of resources on my 10k1 card. For this reason I made myself a plugin to replace the kvm-100. It seems to work good, and it uses less resources and handles more notes, so I thought I would post the code in case you want to check it out, etc:

Code:

output cv, gate_;
control note=0x30600000, gate=0x0;
temp t

macs      cv,  0x0,  note,  0x80;
macs      gate_,  0x1,  cv,  0xaaaaaab;       
macints t, 0x0, gate_, 0xc;
macints t, t, cv, 0xffffffff;
macints t, 0xc, t, 0xffffffff;
     
macs cv, 0.62976, 0, 0;     
skip      ccr,  ccr,  0x7fffffff,  t; 
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;
macs      cv,  0x0,  cv,  0x78d0df9c;            
    
skip ccr, ccr, 0x7fffffff, gate_;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macs cv, 0, cv, 0x40000000;
macints cv, 0, cv, 0x2            
     
tstneg      gate_,  gate,  0x7fffffff,  0x53e2;

-Russ

stylus02 · Jan 22, 2008, 03:50 AM

a solution without a lookup table. the kbu calculates the exponential cv on the fly - very cool. i tried it out and it works excellent over the full note range. can you explain what you have done exactly? (before i do reverse engieering)

stylus

ps: this kbu could be called "kxm 101" or anything else and could be part of the final release of the synth with your copyright's, if you want. ( the range kxm 100-199 was planned for keyboard related stuff) in each case i want to set a link to this.

Russ · Jan 22, 2008, 07:08 AM

It calculates the note (0-11) and octave (1-11), and then uses the following formula to calculate the frequency (your exp values are related to each other in same way as the original frequencies):

freq = start_freq * 2^(-1/12)^(number of half steps from start_freq)

2^(-1/12) = 0.94387431268169349664191315666753

Raising a number to a power(x) is just multiplying that number by itself (x) number of times, so we can just multiply by 2^(-1/12) for each half step we need.

Then for each octave (x) we need to go down, we just multiply the value by 0.5, (x) number of times.

The calculations use C9 as the starting freq, but it's value is greater than one, so instead I use C8 (0.62976) and multiply by 2 at the end.

The calculations at the top just calculate the note (0-11) and octave (1-11), and then offsets the values, such that it tells us how many multiplies to skip.

note = (slider value * 0x80)
skips for octave calc = 0x1 + (note / 12)
skips for freq calc = 0xC - (((skips for octave calc) * 12) - note)

(hex values (above) represent fractional values)

Does that make sense to you?

Feel free to use the code however you want...

stylus02 · Jan 22, 2008, 07:25 AM

simple, but great idea. actually i'm doing some optimizations in dane and c++ to save gpr's.

copyrights are important to me. every idea should be protected. it does not play rolls if we work on open source or commercially projects.

Russ · Jan 22, 2008, 07:47 AM

If a GPR is overwritten anyway, then it is free to be used for temp storage before that point (and output GPR's can be used more then once in your code (just not inputs)), so take advantage of that fact to save GPR's (i.e. 'cv' and 'gate_' in the above code are used for temp storage in the calculations at the top of the code).

i.e.
kvm300
'a' is not needed at all, as 'out' can be used instead.