flight of harmony Infernal Noise Machine, Manual

Page 1: ...flight of harmony ...

Page 2: ...2 24 Contents I N M Features 3 Specifications 5 What is it 8 Controls and Usage 9 INM Exp 13 Tips 14 Calibration 15 VCA 15 VCO 16 Modulation 17 Waveshaping 18 Thanks 22 ...

Page 3: ...ins o Frequency Width à à Width of Frequency band affected Frequency CV input attenuator o Range Range CV input attenuator Width à à Width of Range band affected o Domain frequency range groups 8 switch selected Tone control o Variable between low pass and all pass Adjustment also varies phase interaction Inputs o CV 0 to 5V Over and under voltage protection Frequency and Range CV buffered Coarse ...

Page 4: ...nal input o Level control Inputs o CV 12V VCO frequency o Ext External modulation source AC coupled 5V soft clip limited o Mod CV VCO Modulation Depth Outputs 5V o Square o Ramp o Saw o Triangle o Sine Dual Voltage Controlled Filter VCF one per channel Controls o CV Center Frequency CV input attenuator o fc Center Frequency o Gain Gain level o Selector switches In VCA section In Out à à Have VCF e...

Page 5: ...evel Buffered o In External signal input à à Breaking Outputs o Out Signal out à à 5V soft clip limited à à Non breaking o All Out Average of VCA1 VCA2 à à 5V soft clip limited Control à à Volume Specifications Type o Paraphonic sound source Oscillator o CV Signal processor Format o Eurorack Width o 48hp 243mm 9 6 Depth below panel o 41mm 1 625 Height above panel o 28mm 1 25 Power o Current draw 1...

Page 6: ...king output jacks to allow the signal to be used externally as well as control the IMP Voltage Controlled Oscillator VCO with Square Ramp Saw Trian gle and Sine waveforms available to each signal chain along with independent output jacks for each waveform The VCO has two user selectable ranges 1 Volt per Octave 1V Oct covering 19Hz to 44kHz Low Frequency Oscillator LFO covering 750Hz down to 0 001...

Page 7: ...al the soft knee performs a gradual limiting of the signal as it ap proaches 5V Summed output of VCA 1 VCA 2 available at the All Out jack via the Volume control Design Features Lifetime warranty against defects in assembly Components on one side of PCB for easier serviceability Modular build to allow simpler repair or replacement of hardware All trimming potentiometers accessible without disassem...

Page 8: ...ere is really no simple way to describe what the INM can do you have to find out for yourself This is a unique device It requires a bit of time and patience to get a feel for how it works but it is worth the effort The INM does not operate the same way as a traditional synth The traditional signal path in a synthesizer can be generalized as the following oscillator filter effects mixing output The...

Page 9: ...thing will piss you off It was designed to do new things in new ways so there is a learning curve With both the original desktop INM and testers of the INM E module some dove in and immediately understood how to use it while others had weeks of frustration wondering why they kept getting variations of the same ear splitting drone It got its name for a reason Your prior experience with synths doesn...

Page 10: ... Width makes the Fine into Extra Fine In Domain 1 wide open is best In Domain 8 the bands of sound are very narrow so it is best to set the width all the way down to find the hidden sweet spots 2 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Domain Frequency Range Width Fine joystick only Range fig 3 Domain vs Range vs Width In other words 1 8th of the possible frequency range is selected by Domain and the othe...

Page 11: ...riangle and Sine while the sixth connects the filter input directly to the output of the IMP think of it as a VCO bypass Filter Bypass Here we take a quick jump up by the VCA section to the Bypass VCF1 and Bypass VCF2 switches These two switches allow you to bypass the voltage controlled filters VCF and send the selected signal selected with the Input rotary switches directly to its voltage contro...

Page 12: ...el control for the VCA Fully clockwise is maximum 5V and fully counter clockwise is full attenuation CV Level Controls the attenuation of the external CV signal used here to vary the level of the output signal Volume control This is the last stop for the signal on its way to the All Out jack the volume control Turn clockwise for full volume counter clockwise for full attenuation ...

Page 13: ...g In specific With INM E VCO toggle set to 1V oct and INM Exp set to Exp INM E VCO outputs are 1V oct rate tracking CV Mod source as explained in original description INM Exp outputs are LFO rate tracking the INM Exp Tune CV jack no modulation from the main INM With INM E VCO toggle set to 1V oct and INM Exp set to INM INM E VCO outputs are 1V oct rate tracking CV Mod source as explained in origin...

Page 14: ... time when I go in trying to make a cool sound The INM is built on subtleties and small changes making big differ ences When modulating the VCO the greater effect is when the VCO and the Noise frequencies are closer together i e the effect is minimal when the VCO is in the bass range and the Noise Domain is in Eight but extremely dominant when similar in frequency Saw on one channel Ramp on the ot...

Page 15: ...ver Setup Oscilloscope o Set display to 2 5 Volts per division o Connect oscilloscope to VCA Out jack Set related VCF bypass toggle to Out Set Channel VCO waveform switch to Square Set VCA Level to maximum full CW1 Procedure Observe waveform on oscilloscope display Adjust to 5V centered on 0 Volts fig 5 AMP adjusts amplitude of output BIAS adjusts baseline shift from zero Repeat for second channel...

Page 16: ...place Tools required Small flat bladed screwdriver Frequency meter Voltmeter Reference points fig 6 CV and Common on rear of VCO PCB fig 7 Side of INM E showing V Oct and BaseF trimmers and alternate Common reference point Procedure Power up your INM E and allow it to warm up for about 30 minutes Adjust VCO panel controls o Set Tune to midway o Set CV to minimum full CCW o Set Mod Depth to minimum...

Page 17: ...dard calibration is as follows fig 8 VCO Modulation trimmer potentiometers and TP1 test point Tools required Function generator 2 channel oscilloscope Small flat bladed screwdriver Setup Oscilloscope o Set display to 1V per division o Set vertical mode to chop display both channels simultaneously o Verify both channels set to same 0V baseline o Connect channel 2 to test point TP1 Function generato...

Page 18: ... it contains some of these artifacts as well fig 10 VCO waveshaping trimmer potentiometers Tools required Oscilloscope Small screwdriver Setup Oscilloscope o Set display to 2 5 Volts per division Set VCO toggle to VCO Set Mod Depth to minimum CCW Set Tune to midway Procedure Use the VCO Out jacks to calibrate each waveform in turn Square o Nothing to change here please move along Ramp RMPBIAS o Ad...

Page 19: ...like that I mean really the damn thing has enough trimpots already doesn t it o TRSIADJ affects both triangle and sine Adjust to correct any unevenness at the bottom of the waveform but it will also affect the triangle Find a suitable medium o SINBIAS is not the same as the other bias adjustments the uppy downy thing it is the bias on the distortion applied to the triangle relative to the zero Vol...

Page 20: ...mer potentiometer adjustment LFO Note The LFO is a basic triangle oscillator with all other waveforms derived by distorting the original triangle and its attendant timing square wave fig 15 LFO trimmer potentiometers Tools required Oscilloscope Small screwdriver Setup Oscilloscope o Set display to 2 5 Volts per division Set VCO toggle to LFO Set Mod Depth to minimum CCW Set Tune to 3 4 CW to full ...

Page 21: ...alves of the ramp fig 16 fig 16 LFSLEW trimmer potentiometer adjustment o LFHI LFLO these adjust the heights of the two halves relative to the zero Volt baseline If you touch one you will likely need to touch the other These are annoying to deal with and must be adjusted carefully LFHI adjust the position of the upper half LFLO the other half If these need adjustment I start with LFHI bringing it ...

Page 22: ...or all the help in getting this thing going Every bit of this ordeal was helpful Extra thanks again to HeWhoWantsJeans for putting up with my autistic ass all these years and supporting me through everything A huge shoutout to everyone who joined in in the Kickstarter and helped make this product launch a reality The INM E would not be here without your trust and support flight ...

Page 23: ...turing and workmanship for the lifetime of the product Please contact me via email at support flightofharmony com Stuff Comments suggestions complaints to flight flightofharmony com Drawings and designs 2021 flight of harmony http www flightofharmony com Published March 2021 ...

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