SVF 201 - KOMA Elektronik
Contents
1. OVE 201 ANALOG STATE VARIABLE FILTER USER MANUAL Dear KOMA user Thanks for purchasing one of our Eurorack modules the SVF 201 Analogue Vactrol State Variable Filter We are very happy you de cided to add a nice shade of white with a backlit knob to your Eurorack Modular system We tried to make this module just as versatile as our other prod ucts and are confident we succeeded in that Before you get started please let us introduce ourselves to you We are KOMA Elektronik we come from Berlin a town filled wi musicians producers artists and remixers Music is everywhe We make music ourselves as well sometimes successful som imes less successful but we have a good time doing so A hat for us is what it s all about the mere fun of creating soun obody else made before the fun of crossing all borders and our imagination go the fun of exploring musical boundaries and ot looking back ur filter resembles that vision compact yet powerful the SVF 201 is a state variable filter for the Eurorack modular synthesizer system Its circuit is built up with optical parts vactrols deliver ing excellent studio audio quality and an unique warm analogue sound e module uses parallel mounted PCBs so it can be used skiffs as well as in big cases the total depth is less than 4 n The SVF 201 comprises 4 audio outputs that can be used independent of each other at the same time a High Pass Band Pass2. eu Br Our mn MIX OUT OLOre SUB BASS RESONANCE When using the HI PASS output at a very low cutoff and high resonance sub bass frequencies are added around the Q frequency Adjust the CUTOFF to tune the resonance to your song RESONANCE Ma CUTOFF RESONANCE id OUT HP OUT MIX OUT E oy Q amp O FILTER TYPE SWEEP Patch an LFO into the SELECT CV input to sweep through the different filter types creating completely new sounds It can result in some formant like sounds Crank the Input and distort it even more if you like RESONANCE Ma CUTOFF RESONANCE SELECT QO amp AN AN LFO IN S uy C HP OUT MXC OUT pe f ie BP Cur SE CE AUDIO OUT LP OUT BE OUR HE OUR MIX QUI ANALOG STATE VARIABLE f FILTER PU Pe TePeTeTOTTOTOTecerererverevererererrererererererrererererererrererrrerererrererererererrerererererrrrirtererererrrririrerererritertirerererrrrirtirertererrrrerigey CV THEORY The concept of control voltage CV is not hard to understand instead of turning a knob on your pedal you simply connect a voltage the control voltage to the corresponding CV input that does the job for you All of the CV inputs theoretical ly accept control voltages from 100V to 100V though a range from 5V 12V 15V to 5V 12V 15V is more common and usable BIPOLAR CV SIGNALS 9V Bias Voltage
3. Low Pass and the unique first ever CVable Mix Out which allows you to sweep continuously through the other three out uts by means of a knob and control voltage Now wire up that ilter and get funky the best from Berlin The KOMA Elektronik Team Wouter Jaspers Christian Zollner Robert Kunz Hayden Moskowitz GETTING STARTED 1 UNPACK YOUR NEW GADGET The package comes with the SVF 201 filter module a 16 pole ribbon cable with connectors a small bag with four screws and washers for front panel mounting and this manual 2 CONNECTIONS First off be sure that the bus board of your system is unpowered Take the connector cable and insert it into the bus board of you modular system Be very careful when doing so because it is easy to shift the connector and place it incorrectly The red marked side needs to be connected on the lower side o a Doepfer bus board and on the marked side of the module 12V rail If attached correctly the keyed header will have the right ori entation for keyed power systems e g uZeus See the rear pane picture for more Clarity 3 POWER UP Power up your system and check if all supply rails are up and run ning 12V and possibly 5V often there are indication LEDs on the bus board showing if the rails are working properly When the power is connected properly a white light a nice nimbus underneath the big Cutoff knob should light up FEATURES The use of th
4. as a normalled CV source from 0 SV for manual sweeps through the filter types 8 Mix ouT Audio Output The Mix Out is a special output of the SVF 201 which contains all three of the above outputs LP BP and HP You can sweep continuously through these three outputs with a control voltage signal from 0 SV This output has more internal gain than the three different single outputs so signals taken from this output will have more overdrive distortion than their respective partners The signal levels themselves are identical though 5V RAIL CHOICE If you have a 5V power supply on your bus board rails and you want to use it with the KOMA Elektronik SVF 201 then you can change the second jumper setting from Onboard to Bus Don t worry the two 5V rails can never be connected together regardless of how you place the jumper ISP PROGRAMMING HEADER FOR MIX OUT If you have access to an ISP programmer and you are familiar with programming micro controllers you can use the 6 pin ISP header for connecting your programmer to the module You will find the pre loaded code as well as some alternatives on our homepage at www koma elektronik com 3 LED CORONA If you don t like the white light around the Cutoff knob simply take out the jumper above LED Corona and try not to lose it POWER CONNECTION Always make sure you align the red stripe on the power connector to th
5. be honored if the product is not properly packed Once you have received the RMA number and carefully packed your product ship the product to KOMA Elek tronik and include your return shipping address What will we do Once received we will examine the product for any obvious signs of user abuse or damage as a result of transport If the product has been abused damaged in transit or is out of warranty we will contact you with an estimate of the repair cost Warranty work will be performed and KOMA Elektronik will ship and insure your product to your address free of charge How to initiate your warranty Please initiate your warranty online by sending an email to support koma elektronik com Low Bias Voltage High Bias Voltage A similar thing happens to unipolar CV signals their point of origin OV is shifted by the amount set with the corresponding knob In other words you add the volt age of your knob to the voltage of your incoming unipolar CV signal UNIPOLAR CV SIGNALS 9V Bias Voltage set by knob NID OY Original CV Signal CV Signal inside the pedal Casing 2mm Aluminum front panel powder coated white with silkscreen printing Dimensions 3U Eurorack module 12HP wide 40mm deep Shipping Weight 250 gram 0 55 lbs Connectors 4 Audio outputs low pass band pass high pass mix 3 CV inputs cutoff resonance mix Power requirements 80 mA 12V 11 mA 1eV lf you do not
6. from these trimmers O 1 Jo on0000000 o0000000 FILTER MODES LOWPASS LP OUT BANDPASS BP OUT HIGH PASS HP OUT Amplitude Amplitude Amplitude LOWPASS HIGH PASS Let s low BAN D PASS F Let s high frequencies pass F frequencies pass Let s a band offfrequencies pass Cutoff Frequency frequency Cutoff Frequency frequency Vertretungsberechtigte Gesch ftsf hrer Managing Director Christian Zollner amp Wouter Jaspers Sitz der Gesellschaft Registered Office Berlin Germany IMPRINT KOMA Elektronik GmbH is a subsidiary company of KOMA Elektronik B V Amtgericht Berlin Charlottenburg Registernummer HRB 145453 Registergericht Court of Registration O RESONANCE he Q of the filter better known as resonance The ance of a filter determines the gain increase of ignal at the cutoff frequency Set it low CCW to the signal gain at cutoff frequency at zero and it CW to hear plenty of resonance at the given cut off frequency Be aware of the fact that the filter will start self os cillating when you are at or near maximum resonance RESONANCE CV Inpu CV input for resonance 0 modulation It has the same specifications as the Cutoff CV input SELECT CV Inpu CV input to select which output will be present on the Mix Out audio output This CV input accepts 0 SV unipolar If there is no CV signal sent into the input in the Select jack the attenuator acts
7. have web access fill out your personal information on a letter and mail to KOMA Elektronik GmbH Mahlower StraBe 24 12049 Berlin Neukalln Germany Graphics by www rabadaun com
8. e FT201 is pretty straight forward There is the CUT OFF knob with which you set the cutoff frequency for the filter simultaneously for all three filter characteristics Fully coun er clockwise sets the cutoff frequency to the lowest and fully clockwise to the highest frequency The RESONANCE knob sets the Q of the filter better known as res onance The resonance of a filter determines the gain increase of the signal at the cutoff frequency Set it to low CCW to leave he signal gain at cutoff frequency at zero and high CW to hear plenty of resonance at the given cutoff frequency Be aware of he fact that the filter might start self oscillating when you are at or near maximum resonance The MIX OUT is a unique output that combines all filter types You can sweep through from lo pass to band pass to hi pass with the SELECT potentiometer The SELECT potentiometer is also able to be controlled via CV FRONT PANEL CONNECTIONS amp CONTROLS CUTOFF Sets the cutoff frequency for the filter simultaneously for all three filter characteristics The full CCW position sets the cutoff frequency to the lowest and the full CW position to the highest frequency N D KOMA ELEKTRONIK CV Input CUTOFF 2 VACTROL CV input for cutoff modulation This input reacts to bi polar CVs internally only a 5V peak to peak signal is processed so every CV signal exceeding a voltage of SVpp will have to be attenuated to u
9. e red stripe marker on the module To be extra safe make sure that the cable you are using is correctly wired which means that one connector faces up and the other down when you hold the cable in front of you with the flat side up MIX OUT LP BP HP MIXED OUT LOWPASS BANDPASS HIGHPASS Amplitude Cutoff Frequency frequency 0 25 V Zea ZION 475 voltage KOMA Elektronik GmbH Mahlower Strasse 24 12049 Berlin Neukolln Umsatzsteuer ID VAT ID DE285522050 Germany BASIC SETTINGS DISTORTED LOWS When the input gain is all the way up the signal is distorted along with high resonance creating a gritty sound Adjust the CUTOFF to tune the resonance to your incoming notes CUTOFF RESONANCE INPUT CUTOFF RESONANCE SELECT aN Sale La AUDIO IN N xy LP Our BP RUI HP QUT MXE OUT 3 CHANNEL MIXER Take each output channel into its own channel on a mixer to blend between each filter type manually Use all three signals at once with various levels to find new timbres and textures NSONA Ge CUTOFF RESONANCE SELECT O00 Br 2s l eta AUDIO IN N xy LOUT BP our fir QUT MIXQUT OSCILLATOR Patch the HI PASS Audio Output back into the AUDIO Input to create an oscillator Adjust the CUTOFF by hand or via CV to change the pitch C CUTOFF RESONANCE INPUT CUIOFt RESONANC Ei 0 lt ene w7 7y X
10. ge signal from 0 5V The diagram on the front side of his manual under FILTER MODES far right shows the corresponding loudness urves of the filter characteristics in correlation with the CV input Low pass ap pears at 0 25V to 2 25V pure bandpass between 2 25V and 2 75V and from 2 75V o 4 75 you ll get high pass as an output signal All outputs crossfade into each other How to clean your SVF 201 Clean the front panel with a cloth and rubbing alcohol TECHNICAL SPECS AUDIO IN v OEEC EEEETEELEELEECEELEECEELETIS AUDIO OUT oe LEETE ome ALED AUDIO IN AUDIO OUT BD 101 ANALOG GATE DELAY tf OWAN B Ws mm SZ nn WARRANTY KOMA Elektronik warrants its products to be free of defects in materials work manship and conforming to specifications at the time of shipment for a period of two years from the date of purchase During the warranty period any defec tive products will be repaired or replaced at KOMA Elektronik s option on a re turn to factory basis This warranty only covers defects that KOMA Elektronik determines are no fault of the user Returning Your Product You must obtain prior approval in the form of an RMA Return Material Authoriza tion number from KOMA Elektronik before returning any product Email support koma elektronik com to request the RMA number All products must be packed carefully and shipped with all the originally sent content Sorry the warranty will not
11. se the full range of the CV input CUF INPUT ATTENUATOR GAIN vieleicht Audio input to the filter There s plenty of gain here so take care when setting the input level if you do not want to distort your signal Overdriving the input can get you amazingly rich and experimental sounds though so try it out once and see if you like it the filter At the counter clockwise CCW position RESONANCE full clockwise CW position the signal will be boosted there will be no signal going into the module at all at by about 6dB WAW CUTOFF RESONANCE SELECT Vv brd SA Wwe LPOUT _ BPOUT HP OUT MIX OF ys Defines the amplitude of the signal that will travel into O j around 9 o clock the signal will be at unity gain and at Audio Input AUDIO IN l D O 0O 0 Aa a a 2 FN eS LL e Audio Outputs AUDIO OUT O These are the three outputs for the corresponding filter characteristics All three outputs are available at the same time without the need to switch anything around When changing the cutoff frequency or the resonance of the filter you change these features for all of the outputs simultaneously REAR PANEL CONTROLS WARNING Please do not touch or change the four trimmers on the top as they are already Set to best filter behaviour and it is complicated to reset them after you turned them also just a little bit so please just safe yourself the hassle and stay away
12. set by knob CINCOM CV Signal inside the pedal Original CV Signal The incoming bipolar CV signal is shifted around the voltage that you select with the corresponding knob Example if you insert a 5V to a 5V sine wave while adjusting the bias BIPOLAR CV SIGNALS y m 9V Bias Voltage set by knob GND 0V Bias Voltage set by knob GND OV Original CV Signal CV Signal inside the pedal omen BB om RB 1 om EEE 1 om EEE 1 OUT TO MIXER CETELE CELEELEELEELEELEEE ELEELE EELEELEELEELEELEELEELECEECETEECEECUI Comi m om EEE 1 AUDIO OUT HINT Try patching in a full frequency signal such as a drum pattern or loop and take the output from the MIX OUT Adjust SELECT by hand or with a CV signal to create your own crossover network for further processing the specific frequency range Meanwhile use the LP OUT for an unaffected signal OUT TO MIXER TIPS amp TRICKS Using the Input The Input Attenuator Gain control defines the amplitude of the signal that will travel into the filter At a counter clockwise CCW position there will be no signal going into the module at all at around 9 o clock the signal will be at unity gain and at full clockwise CW position the signal will be boosted by about 6dB Using the Mix Out The Mix Out is a special output of the SVF 201 which contains all three of the utputs LP BP and HP You can sweep continuously through these three out puts with a control volta
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