VSDSX USER MANUAL
Contents
1. SENSITIVITY 4 SEMI VEL ON MES noise X full module C BASS SNAR BD SD TH TM TL HH CY PM TOMH TOMM decay Iu A Ic ET SX TOML Z5 noise tone rel Ww EPROM load custom response natural default BASED ON SDSV 5057 5051 DRUM BRAINS WINDOWS 32BIT VSDSX SIMMONS SDS V EXTENDED DRUMS www alyjameslab com USER MANUAL 1 0 BY Aly James f 4 02014 2015 ALYJAMESLAB TABLE OF CONTENTS INTRODUCTION m 3 INS TAEA TON 6 CONTROD PANERS ea ee not ec tn 9 TEMES SPV dd 11 dan E de de ein 17 TRG ERS E O T EE SE 19 BA VOICE ed do do 20 VOCE a Co io 21 MO eo capes 23 CM AE OIE arses 24 26 EPROM TOA DIN da ee AE 29 PR S TSAIMPOR PER PORR 31 MIDA 31 Bie 33 INTRODUCTION My name is Aly James French steam funky musician composer and creator of strange musical DIY devices and software I was planning for a long time to make a2. buffer _ tene FREE 2 Altes p ut PUTER CeT orF imn tun faa Hii STC y i To l co FEFA couTiel LL 1 4 M 3 i NOUS SR NCES _ Borea a mE Sieg LATCH R wer 5 lih ne SELECTED MOD Ic CZ 13 2d pp dl _ Audio Fequipg ME LI CH tg eh PITCH FILTER Cut off TRIGGER p UL PITCH ATTACK VCF VOL VCO NOISE vcr CLICK A VCA OUTPUT The SDS V usually comes with a basic Bass Snare 3 Toms configuration but some lucky ones had the hihat and cymbal modules If you look at these circuit diagrams you can see how the signal flows basically the trigger will engage envelopegeneratorsthat will trigger the VCAs which will shape the noise generator click and tone VCO The click itself is composed of the same filtered noise source Let s look at the noise generator NOISE GENERATOR 55 2044 x S p 2 Qi 2N5172 x 1m 100k It is based on classic transistor noise amplification transistor OPAMP with a special thing the twisted wires E m 4 LU i ne o A It is called a gimmick capacitor used to get a very small pico farad capacita
3. State of VSDSX current features WIN 32 VST runs on 32 64Bit Systems and it is multicore compatible HIGH QUALITY GUI Different panels for controls etc INSTANT UPDATE FOR ALL CONTROLS FULL MIDI AUTOMATION With midi learn right click to assign MIDI ANALOG MODELED OSCILLATOR The special tone characterof the drum synth is mainly caused by the raw analog waveform generation and by the circuitry itself it generate harmonics that are normally not presentin an ideal triangle waveform VSDSX emulates that behavior and also models the analog clipping that occurs when pushed hard You can also switch to a clean mode which will behavelikeanideal system without OPAMP bandwidth limitation more highs These features alone offera great versatility for sound design NOISE GENERATOR CIRCUITRY TWEAKING The sound source of the drum synth was mainly a mix betweenatriangle oscillator and atransistor based noise generator The way it was initially connected could be tuned for more or less frequency content Each voice have different configuration and VSDSX offers user control overthe internal noise filtering especially useful on the snare voice card A lots of the circuitry parameters can also be fine tuned CV and VCA response Triggertypes that will mostly impactthe click attack generatortime etc SSM2044 Filters The noise source was filtered by an SSM2044 low pass filter chip the filter acts on the noise and clicks part and behaves di
4. and the pitch sensitivity is set to 2 SEMI 2 semitones when you hit the pad hard velocity 127 the starting tone will be 2 semitones highersoa B note If hitat mid power velocity 64 the tone will start 1 semitone higher so an note etc The volume setting will enable or disable the velocity tracking applied to the volume this is useful to emulate the run generatorfeature found on certain Simmons systems if you setthe volume tracking to OFF and the pitch setting to 1 OCTAVE hitting the pad at different velocity will only affect the pitch which is useful to make tom runs on only one pad The attack setting will affect the short pulse that is sent to the VCO pitch it isso short 19ms that you don t notice a pitch change but instead it gives a more pronounced attack to the sound you can really hearitif you set for example the BASS to no click no noise and change the attack parameter It ranges from 0 to which basically send the pitch from Oto 3 octaves higher for 19ms The amountof attack also depends on the velocity Note that the VCF cutoff is also affected by the velocity this can be fine tuned on the OPEN SETS panel BASS VOICE The BASS voice tone can be set from 30Hz to 440Hz Thisis the classicconfiguration of the BASS card BASS 30 440Hz Noise cutoff gets brighter with velocity No bend velocity R25 Filter Dynamic Sweep Filter Cutoff envelope affect 75 R27 No resonance R26 No mod Depth R71
5. 00 00 002 1 12 00 00 00 00000 00 00 01000 00 00 02000 00 00 030 00 00 00 040 00 00 00 05000 00 00 06000 00 00 070 00 00 00 080 00 00 00 099 00 00 00 10000 00 00 11000 00 00 12000 00 00 13000 00 00 14900 00 00 150 00 00 00 160 00 00 00 17000 00 00 18000 00 00 19000 00 00 20000 00 00 21 Control Voltage Curve The internal control voltage can be tweaked in VSDSX itis normally a linear behavior but you can also set it to a logarithmic behavior This will change the way the voltage from the envelopes is send the VCAs and change the resulting sound behavior Linear Response Exponential Response SSM2044 Sensitivity As seen previously the trigger velocity can affect the VCF cutoff this sensitivity setting will let you fine tune the amount of voltage applied to the VCF cutoff The normal behavior is to set it fully clock wise but you can reduce the amount for a less responsive filter and a more linear response if needed Note that the VCF also affect the Click so you will notice that the sound gets duller while you decrease the sensitivity A basicsetting to understand how it works is to set the sensitivity fully clock wise and the noise filter knob at 12 o clock When hit hard velocity 127 the cutoff will be like if you have set the noise filter knob to near max if the trigger velocity is very low the cutoff will be near the knob setting point So the harder you hitthe brighter the noise click source will be depending on the no
6. and behaves like the BASS and TOM voice the noise gets dulleras the envelope decays When itis set at 12 o clock it behave like the SNARE voice cutoff is not affected by the envelope and when set fully clock wise the noise starts dull and gets brighter as the envelope decays The fact that the raw sample source gets affected by the pitch bend envelope gives the HIHAT and CYMBAL that unique sound One thing that also happens on real hardware is when the 555 timeris affected by the bend amount and happens to be set at OHz the sample source will not play anymore and will disappear until the change toa higher speed value SENSITIVITY pitch ON ak 1 TES vollage curve Tia ae sensitiv Ul noise tone L ee CT n o 1 x natural default PROGRAH FACTORY Output Stage VSDSX let you choose between CLEAN and ANALOG MODE e CLEAN In this mode the circuitry will behave like an ideal system pure triangle waveform and less filtering This can be useful for a brighter and edgy sound ANALOG this mode the analog oscillators will be affected by the circuitry will have more harmonics but also more filtering This is a sound closer to the real hardware This graphics shows a comparison between the output of VSDSX VSTand a real SDS V at similar settings D Rate 0 00 lt P 00
7. e RES Thisisthe SSM2044 VCF lowpass resonance usually set to none on SDS V excepted for snare you can tune this parameter like you want e CLICK Trigger Shape This is useful to emulate different type of trigger CV Simmons pads generates aricher trigger pulse than sequencer for example This willaffectthe length of the click this parameter ranges from 78ms to 315ms The reset button will restore factory setting MOD amount This isthe a Frequency Modulation amount an LFO is available pervoice like a super SDS3 the LFO can be set to a triangular or square output shape the modulation is applied to the VCO pitch note that the snare has an additional switch which let you additionally route the modulation to the VCF inthis case thisis a pre fader modulation full modulation is sent regardless of the mod amount e RATE This controls the speed of the LFO the divide switch will set the frequency to low range or a high range All these parameters can really shape the sound in many ways itis up to you to experiment TRIGGERS The VSDSX is highly velocity sensitive whenatriggerissentit will followthis path TRIGGER SENSITIVITY PITCH ATTACK VCF VOL VCO NOISE vcr CLICK OUTPUT The amount of which the velocity will affect those parameters can be fine tuned The pitch setting will sendthe pitch higher dependingon the velocity for example if you setthe tone pitch at 440Hz A
8. the sound generation Bass Snare Toms and Hihat Cymbal are tuned differently One voice is EPROM based and can be replaced by external compatible This opens up to any sample sounds Linn DMX Drumtracks etc and even your own created EPROM content See EPROM Loading Basic MIDI implementation MIDI IN VSDSX can receive any MIDI CH as main source for triggers It can be triggered with a standard MIDI Keyboard Pads or even a MIDI Drum Kit The mapping follows almost the same mapping as GM MIDI Standard Note that most DAW can convert incoming MIDI notes to another if needed and that most of the hardware MIDI pads can be assigned to any MIDI notes Bass MIDI notes 35 36 Cymbal MIDI note 51 Snare MIDI notes 38 40 EPROM MIDI note 39 Tom High MIDI notes 41 43 45 E Hihat Closed notes 32 24 Hihat Open MIDI note 46 INSTALLATION COMPATIBILITY VSDSXisa Windows 32Bit VST Instrument for use with MIDI capable DAWs RUN on 32 64 BitSystems If you wantto use it with a 64bit DAW you can use the DAW internal Bridge orJBridge INSTALL VST 1 Decompressthe downloaded archive file 2 Copy the entire Folder VSDSX to your VST PLUGINS folder 3 Load itin your DAW INSTALL STANDALONE 1 Decompressthe downloaded archive file 2 Copy the entire Folder VSDSX_STANDALONE where you want 3 Simply RUN VSDSX exe
9. DS7 for obvious compatibility between VSDSX Software and VLINN Linn LM 1 Software This simply means that you can load 8bit companded EPROM binary images that can have a 12bit range Just make sure to reduce your sample to 8bit prior to converting into an EPROM image if you want the same limitation as the original systems Paul J Whites owner of ELECTRONGATE COM did a great work in finding and hosting a huge archive library of compatible EPROM images in companded format that you can load in VLINN VST VSDSX VST Linndrum DMX etc Some EPROM images are provided in parts and need to assembled to a bigger EPROM image You can do that easily with the PROMENADE software provided and hosted on the same website It also lets you convert your own wav prepared samples to compatible bin images Yeah you can also load your own personal custom made samples into the VSDSX and it will pass through the circuitry Itisa good way to experimenthas you can load anything in there just make sure you prepare your samples correctly normalize the peaks and put a nice fade out in the end so the sample do not cut short this could also produce buffer squeak in some cases Try to record your sample at 22050 Hz so as you can have a nice range of tuning PRESETS IMPORT EXPORT amp FAD VSDSX can load and import its own format presets amp banks All Custom EPROMS file paths are also saved with the patch All MIDI LEARNED amp ASSI
10. GNED parameters will also be saved with the patch Simply name the preset and right click the PROGRAM MENU to save either 1 preset or the whole bank you can also copy the current patch to another location Copy Patch Load Inst Save Inst ms nk Save Bank About MIDI AUTOMATION MIDI LEARN Almost all of the VSDSX parameters can be automated via midi learn or DAW automation allowing great control over the sound Simply right click on a button knob or sliderto assign external MIDI Control or use DAW automation Assign Controller SYSEX 15 Poly Trigger 16 General Purpose Slider Poly Gate 17 General Purpose Slider 3 Poly Pitch 18 General Purpose Slider ur Poly Velocity Key On 19 General Purpose Slider Poly Velocity Key Off 20 Poly Aftertouch 21 Voice ID Bender 23 Channel Pressure 24 Almostall type of MIDI message be assigned or MIDI learned LINKS Aly James centric links Official Website www alyjameslab com Dev Blog www alyjameslab blogspot com Facebook News www facebook com alyjamesound Youtube Channel www youtube com alijamesproduction Soundcloud demos http www soundcloud alyjameslab Twitter alyjamestwitt CONTACT alyjames info gmail com External links Simmons Museum Website http www simmonsmuseum com ELECTRONGATE Archive http www electrongate com dmxfiles downloads html PROMENADE Software http www electrongate com dmwxfiles promenade index html HOPE
11. Noise is equal gain with tone 50 50 SNARE VOICE d TE sosv AF RR aa D10 4 1 P _ R28 p um I T E e CS B xr TR Jj This is the classicconfiguration of the SNARE card SNARE 100 880Hz No bend velocity R25 Filter DynamicSweep Filter Cutoff envelope affect 0 R27 Resonance Q should be 60 R71 Slightly more noise than tone lowers tone or boost noise level R26 5096 Mod on hard hits SENSITIVITY pitch 4 bend OWT noise tone mod amount I F m 2 k 1 a PROGRAH FACTORY The SNARE featured 2 additional parameters the FULL NOISE which lets all the noise generator frequencies pass through and the VCF modulation switch it will send the full modulation amount to the VCF cutoff regardless of the modulation amount VCF modulation is applied additionally to the VCO modulation so you will still have control over the VCO modulation TOM VOICES Thisis the classicconfiguration of the TOM cards TOM HI amp TOM MED 100 880Hz TOM LOW 30 880Hz Noise gets brighter with velocity Bend amount velocity R25 Filter Dynamic Sweep Filter Cutoff envelope affect 75 R27 No resonance R26 No mod Depth R71 Slightly more tone then noise HIHAT amp CYMBAL VOICES Is pm dams The Hihat amp Cymbal modules were pretty rare and unique sounding mostly they were sample based same confi
12. YOU HAVE FUN WITH THE VSDSX DISCLAIMER amp LICENCE AGREEMENT DISCLAIMER VSDSX the software is provided as is without warranty of any kind Aly James Lab alyjames info gmail com the Author disclaim all warranties relating to the Software whether expressorimplied including but not limited to any implied warranties of merchantability and fitness for a particular purpose and all such warranties are expressly and specifically disclaimed The Author Shall not be liable for any indirect consequential or incidental damages arising out of the use or inability to use the Software even if the Author has been advised of the possibility of such damages or claims The user of the Software bears all risk as to the quality and performance of the Software If your computer blows up say I wasn t there of course that should not happen LICENCE AGREEMENT VSDSX is copyright 2014 2015 Aly James VSDSX the software is not public domain and is protected by the copyright laws of the international community In using VSDSX you are not obtaining title to VSDSX or any copyrights You may not sublicense rent lease convey distribute copy modify translate convert to another programming language decompile or disassemble the Software for any purpose You may only redistribute the Software for promotion purpose with Aly James prior written permission Where redistribution is authorized in writing by the Author VSDSX must be redistributed
13. based like 5051 5057 the imported sample will benefitfromthe bend and noise mixingfeature with that crunchy 8bit sound Load yourown custom made EPROM image EPROM formatis the same as VLINN foreasy compatibility between software s VSDSX supports the following type and size EPROMS binaries bin 2716 2048 Bytes 2K 2732 4096 Bytes 4K 2764 8192 Bytes 8K 27128 16384 Bytes 16K 27256 32768 Bytes 32K LOAD amp SAVE FULL PATCH amp BANKS in FXB FXP CONTROL PANELS Overview VSDSX GUI INTERFACE is pretty straight forward it stores the different parameters on different panels The main interface let you select the voice you want to edit for each voice you have those basic controls The SENSITIVITY controls let you fine tune how the trigger velocity will affect the sound The pitch setting will act onthe tone pitch from Oto one octave the volume velocity control can be set to off independently and the attack setting will affect the short pitch pulse of the tone See Triggers The NOISE knob will setthe Noise VCF cutoff frequency it works differently for Hihat and Cymbal Note that it also affects the click sound as itis generated from the filtered noise source The TONE knob will set the base tone VCO frequency The BEND knob will set the bend amount applied to the tone pitch and VCF cutoff not on snare A push button will invert the envelope generator CV to produce a bend up or down The bend down will start from the bas
14. e frequency the bend up will start very low and reach the bend frequency The DECAY knob will set the decay time of the sound envelope it also applies to the VCF cutoff excepted for the snare The VCA response switch can change the CV type from the natural exponential type default to a linear CV type The NOISE TONE mixer knob will mix the noise generator with the VCO accordingly The CLICK knob will mix the sound body noise VCO with the short click sound accordingly PANELS FULL MODULE Will switch all voices to the full module view MULTI OUT Will set the VST to multiple outputs configuration This will route all the voices to a separate output labeled with the voice name You have to enable the multiple outputs in your DAW Each DAW has its way of doing it but it is generally straight forward The multiple outputs let you MIX easily the VLINN voices in your DAW as you will have a plain channel strip for each one OPEN SETS Accessto global configuration panel It Controls SSM2044 velocity affect CV curves and sound emulation modes CLEAN or ANALOG EPROM Load custom Access to the EPROM loading panel only on the PROM voice SEMSITIVITY pitch OFF ON atk 4 55 tone bend decay noise tone L PR GRRH FACTORY I Right click on a knob button or slider will open a midi learn assign menu Ctrl click move allow fine tuning THE SDS V CF swee thot on snare
15. e real Simmons brains at least if you are not an electronicengineer Itis based on the SDS V but also mixes some features from SDS3 SDS7 and SDS1 Lo STACH 4 Min dre t EAD SDSV 5 MODULE TONE SOURCE L if Ti ul NORE xu PITCH L 1 This emulation is based on reverse engineering and old datasheets it uses a custom with modeled Analog circuitry Oscillators Counters OPAMPS amp Filters The product has been assembled through the SYNTHEDIT framework using the very last version Mostly custom coding and somethird party licensed code where nothing fancy were needed It will be ported to OSX atsome point in the future Thanks to all the nice people that started to use VSDSX and support my projects and to proud owners of original SDS V Units who have sent me some recordings to make tests A special thanks to Dave Simmons Simmons drums Creator amp Wolfgang Stoelzle simmonsmuseum com Mainly VSDSX can be triggered via MIDI following mostly the GM MIDI Drums mapping Each trigger will engage some envelope generators that will act on different part of the circuit The output is amplified by an OPAMP and will be filtered in some way differently depending on the volume the analog behavior emulation will reproduce the soft and hard clipping when pushed hard Each voice has its own knobs that will control all the parameters of
16. fferently depending on the voice on bass amp tomsthe resonance resistor was usually setto noresonance butthis can be tweaked inside the VSDSX if you want PITCH BENDING amp 5057 LFO FM modulation One of the obvious things that must be there in a drum synthesizeris a pitch envelope to simulate the behavior of real drums The SDSV module featured a bending down effect that can be set to more or less amount of bending VSDSX also features a bend up option and an optional FM modulation taken from the SDS7 module SEPARATE OUTPUTS The SDSV have separate outputs for every voices and so as the VSDSX You can choose from ALL to 1 Stereo Channel or Separate Channels for each voice TRIGGER SENSITIVITY CONTROL amp VELOCITY The drum synth is highly sensitive to the power with which a pad or a 15 hit VSDSX gives independentaccessto sensitivity tuningforeach voice pitch of the tone VCF cutoff clicktrigger etc You can also disable the volume velocity tracking and only seta pitch sensitivity which gives access to a similarfeature than the run generator found certain Simmons Systems GUI amp AUTOMATION The GUI features all the SDSV controls with the same weird naming but can also give access to a full module display with more in depth controls most of the parameters can be MIDI learned and controlled by an external MIDI Hardware or automation LOADING EXTERNAL EPROMS DATA The VSDSX provides one voice which is EPROM
17. guration for both cards but in a very particular way Honestly the metallic waveform has nothing do with a real hihator cymbal sound you can hear its looping and the raw 8bit character but Thisis CULT sound If you play this with bending up or down while toying around with noise and filter you get these famous cymbal sweeps Velocity can also act on the sample rate and it sounds pretty original Memory was expensive at that time so you cannot store long sample and be cost effective So Dave Simmons looped the short sound stored onto a 2732 EPROM a trick first used by Roger Linn inthe LM 1 butthis time the sample is read forward then backward The loop plays all the time inside the SDSVs digital modules and only VCA and VCF are triggered this configuration opens up to very long decay settings The 555 Timeris the clock which set the speed of sample reading the CD4516 are the counters and the CD4013 is changing the readout direction once counter reach the end The data are stored as a linear 8bit format and decoded by the emulated linear 8bit DAC SEHSITIUITV pitch SEHI nome HIHAT tone bend up noise tone mod amount 4 L Li SE c natural def PROGRAH FACTORY I PLEASE NOTE A PARTICULAR BEHAVIOR for the NOISE filter knob when set fully anti clock wise itis affected by the envelope
18. in its original archive format and must not be modified in any way All such authorized redistribution must be accompanied by clear messages stating the origin of the software as an Aly James Lab product this license a link to the Website alyjameslab com The userIDis hard codedintothe GUI and each version of the software is unique By Using the Software you are agreeing to this disclaimer and license VSTisatrademark of Steinberg Media Technologies GmbH VSDSX VST does in way imply Simmons s permission or endorsement of the VSDSX product It is dedicated to the true work of Dave Simmons the inventor and original creator of the Simmons Company 02014 2015 ALYJAMESLAB
19. ise filter setting SENSITIUITY pitch 6 SEHI atk bend Uj eee ee KT NC NM noise tone response natural defaull 2792 4096 PR GRRH The VSDSX features an import function for compatible EPROM Binary Images bin files This kind of works in a vintage way Mainly because HEY IT S A VINTAGE GEAR EMULATION DUDE e FIRST you need to set the custom size of the EPROM image you plan to load don t do it after because changing the size of a custom slot will erase the memory of the PROM to ensure the next loaded data will not be corrupted e Note that the EPROM sizes available correspond to typical format you might find and most of the samples you will load will fit in e the size is specified you can LOAD an EPROM image of the corresponding size by clicking on the triangle button If you make a mistake it will not blows up simply if you try to loada biggerfile thanthe size previously set you will lack the ending part of the sample if you do the opposite loading a shorter file than the previously set size you can have corrupted data instead of silence in certain cases e Note that the PROM CARD voice is an additional voice which means that it does not contain data unless you load some in e sound data will be mixed with the noise generator much like the HIHAT amp CYMBAL VOICES THE DAC emulation has been switched to an AM6070 DAC instead of the linear 8bit DAC used on SDS1 or S
20. l body no click the volume will increase significantly and you might reach clipping earlier The analog clipping is pretty nice and can bring some punch and presence to the sound it depends what you are after This graphic shows the waveform from really clipped to none Be 0 00 T 00 00 00 02 MD T cT mpm mm TD S EODD ERN jE ul ER EEE i i i UE fe og Rate 0 00 uil 00 00 00 000 t iD TET xs BE m AX Tenens mU VS SG VT VT 7 7 mom X ELBE EBL ER E ana EL EHI EA ait EE A RS PR RETE The volume can get pretty high so be sure to reduce your DAW channel volume to keep plenty of headroomQ SENSITIVITY pitch ak 1 noise BASS tone bend down noise tone r PS ee ee natural defaull PROGRAH FACTORY I The Full mode gives you access to all the fine tuning controls of the voice card Set the general volume of the voice can reach analog clipping if pushed hard e HPF This setting Controls the internal filtering of the noise generator usually set to high excepted for snare you can tune this parameter like you want
21. n accurate Simmons VST dedicating to the 1 Great Analog drum synth in History mainly because have never been happy with packs of samples coming from different recording chains lack of control over the pitch and source mixing and all that makes the unique sound of that legendary drum brain invented by Dave Simmons You probably already heard aSimmons drum synth without even knowingit wondering what was used to produce that huge drum sound The Simmons hexagonal shaped electronicdrums were all overthe place on countless records and live shows during the 80s used by artists and bands like Genesis King Crimson Jean Michel Jarre Prince Herbie Hancock Pink Floyd etc The sound was notespecially realisticbutitwas notthe goal the goal was to be huge and versatile Invented by Dave Simmons the most famous drum brain called the SDSV 5055 was a drum synthesizer bringing synthesis into the drummer hands Often used abusively to generate only those pewww pewww tom tom sounds the SDSV module produced a wide range of sounds With a great punch and sensitivity a truly unique and cult sound it can be usedfor almosteverything The SDSV successorcalled SDS7 bring some digital low fi samplesinthe game and a bunch of additional features like bend direction or FM modulation fora broader range of possible sounds The SDSV is an historical piece of gear that has a place in the sound of the 80s andis still used today as a secret weapon Only aro
22. nce and it is here in place of a proper compensation capacitor on the op amp It seems to let one be able to tune the noise easily this is available to tweak in VSDSX as the HPF knob It lets you filter out some of the noise generatorfrequencies and is nice to produce a fullernoise sound the SNARE in VSDSX have an extra setting called FULL NOISE which will brings all of the noise generator frequencies THE SSM2044 VCF 15V NOISE IN 2 3 On 820p 4 5 lok lOn l n RESONANCE 7 100K pot 8 47K ou SSM2044 FILTER SWEEP not on SNARE AUDIO OUT lt OV IK SSM2044 24DB VCF LOWPASS ov The iconic Curtis chip SSM2044 but also low cost low pass filter was used to filter the noise in the SDS V the resonance can be tweaked butneverina bigamountand you will not reach self oscillation on the SDS V This is the type of filter that will not maintain the gain around the cutoff resonance so you will lose the bottom end The frequency CV of the filter will be affected by the envelopeandthe trigger velocity the noise will get dullerasthe sound decay The snare is connected differently and the envelope will not affect the frequency CV whichis more likea real snare THE VCO The raw analog triangularoutput get filtered by a basic RC circuit which form a low pass filter at 338 6Hz Vins b Vout s O47 pF Transfer Function 2127 65957447 G s 5 2127 65957447 Cut off f
23. requency fc 338 627538493 Hz R 1000 C 4767 CR Rise Fall time of step response Filter Pale s p 338 627538403 Hz l 338 627538493 Hz Final value of the step response on the condition that the system converged when t goes to infinity 1 Aasnitude 1 0 1E 19 0 100 0 1 3 IES 100 5 2 J Phase Cdi 2 J This filtering is only applied in VSDSX when you are in ANALOG mode ANALOG SOUND The nature of analog is that every part of the circuitry will influence the other One of the main things that get affected is the sound harmonics and distortion VSDSX lets you switch between a CLEAN read ideal mode and ANALOG harmonics and filtering The nature of the tone VCO will be affected by this setting especially because an ideal triangle wave contains only odd harmonics ithas a characteristicsound similar to a square wave When in analog mode differentharmonics will be introduced included even ones and the sound characteristic will change a bit The graphic shows the differences between clean ideal triangle and analog b gt Rate 0 00 00 00 00 107 The analog clipping also happens on CLEAN mode and will affect the sound depending on voice volume Note that the more you mix CLICK with the sound body the less volume the sound body will have If you NOISE TONE mix to ful
24. und 5000 of these things are out there so don t count on findinga working one easily or for cheap The machine was made by a true innovator that later unfortunately lost his Simmons Company He should probably getis name back at some point As there were no accurate VST for this legend out there had to make the VSDSX have also taken some freedom to tweak a bit the behavior of the original system to make it even more versatile Personally grow up listening to a lot of 80s music the Simmons drum sound was preeminent and was a huge part of that particular sound The fact that the SDS V was mostly analog it was also secrettool the make some drum layering with real drums or drum machines like the Linn LM 1 or DMX the clever design allows agreat range of drum sounds from real sounding drums to sci fi and experimental sounds all with a great sensitivity Lots of real drummers praise the Simmons Kits even today More recently the electronicscene has also embraced again analog and the Simmons drums are highly praised The special sample based hihat and cymbals are unique and you will discover why inthis manual The coolest thing was that raw analog character and the awesome punch the brains delivered All of these have been studied and have tried to reproduce accurately the sound generation think the resultis pretty nice solet s bring back the Simmons sound together VSDSX gives you even more control over the sound generation that th
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