microGOTHARduo Manual
Contents
1. FM PWM ADSR loop Envelope Gwg Oscillator 1 ADSR Envelop e Fxm amount Cutoff 12 db Mixer and LPF Ipf hpf Ring Filter Modulator HPF Cutoff Fxm Guz Cutoff Oscillator 2 ADSR loop envelop e Random Generat or Random Generator PWM FM AD Loop Envelope Loop Envelopes Modulators Instead of the usual envelope LFO configuration found on many synthesizers the microGothar has loopable envelopes When loop is off it acts like an ordinary AD SR envelope but when loop is on it acts like an LFO where you can almost freely shape the waveform and make it sync to note on s if desired D Loopenvelope loop off S R Key on Key off T2 Loopenvelope loop on T3 Tl T4 Connections 9V DC power connector Connect the supplied 9 12 V DC power supply to this MIDI in Connect this to the MIDI out of a MIDI transmitting device MIDI keyboard sequencer computer or whatever Audio In Jack Here you can connect a line level sound source like a cd player a drum machine a sampler or another synthesizer That signal can run through the microGothar s ring modulator and filters plus it can be used as an FM source it replaces oscillator 2 when selected in the mixer section Out 1 Jack This is a line output of voice solo and needs to be amplified Connect it to an amplifier or a mixer When a jack is plugged into this voice 1 is no longer present on the Mix2. M2r Filter modulator 2 release A Amp envelope attack D Amp envelope decay R Amp envelope release 28 SAVE PATTERN lt empty gt I SAVE A 02 I TO Edit Enter Run Stop Exit Next Page FFO Select the location where you want to save your sound sequence to using the Dec Inc buttons and push the Enter button to confirm and move to the name pages Push the Edit button to exit save mode if you regret Edit Enter Run Stop Next Page Letter 1 Letter 2 Letter 3 Letter 4 Oo 2 Oo Use edit knob 1 4 to select the first four letters in the name Push the Enter button to select letter 5 8 and one more time select the last four letters Pushing Enter after entering the last four letters saves the pattern and returns to the Pattern Select page 29 MicroGothar Duo MIDI implementation After setting the MIDI channel as explained in the pattern page section microGothar can be controlled from an external MIDI device on that MIDI channel If sync on the pattern pages is set to Ext microGothar s sequencer will start stop and syncronize to the external device It receives note numbers 0 120 pitch bend program change and the following MIDI controllers Ctrl 1 Filter cutoff Ctrl 2 Filter resonance Ctrl 3 Gwg 2 filter cutoff modulation amount Ctrl 4 Filter loop envelope 1 modulation amount Ctrl 5 Filter loop envelope 2 modulation amount Ctrl 6 Gwg 1 pw Ctrl 7 Gwg
3. without saving your edits will be lost Have a look at one of the following pages to see how to save a pattern COMMON ChA ChB Syn Mode 1 2 int duo ChA The common MIDI channel on which microGothar will receive MIDI note on s and off s bender controller and program change messages In dual synth mode this is the receive channel for synth 1 ChB When in dual mode this sets the MIDI receive channel for synth 2 Syn SYNC Selects whether the build in sequencer will sync to it s own internal speed clock or to an external MIDI clock Mode Selects what voice mode it will be in Duo Duophonic mode Mono Monophonic mode Unison 2 sounds stacked upon each other for a fatter sound Dual The two voices is split into 2 synths which can have their own sound and sequence GWG 1 Wave GWG stands for Gotharman s Wave Generators and is the oscillators of the microGothar They are digital but with no aliasing errors Most other digital oscillators are using the sample frequency to adjust the pitch They have a base frequency on maybe 44 1 KHz maybe on C4 Since we don t want to hear the sample frequency we put a low pass filter on the output to remove everything above 20 KHz This will work fine as long as you play the C4 note but if you go 1 octave or more up or down the sample playback frequency will change and the filter on the output called anti aliasing filter will no longer work and the str
4. 1 pw modulation amount Ctrl 8 Gwg 1 frequency modulation amount Ctrl 9 Gwg 2 pw Ctrl 10 Gwg 2 detune Ctrl 11 Gwg 2 wave startpoint if keysync or oscillator sync is on Ctrl 12 Gwg 2 pitch modulation amount Ctrl 13 Gwg 2 pw modulation amount Ctrl 14 Glide portamento time Ctrl 15 Overkill distortion level Ctrl 32 value below 64 selects pattern bank A H a value above 64 selects pattern bank I P Ctrl 21 Sequence start point when seq mode is kyb 30 INFORMATION The microGothar Duo is engineered by Gotharman Flemming Christensen in the year 2011 It is protected by the law of copyright and is therefore not allowed to be copied by any other than Gotharman himself unless an agreement is made I hope you will have years of trouble free fun with your microGothar If you have any questions or troubles with your microGothar feel free to contact me I also repair almost every electronic musical devices implement MIDI in non midi devices and engineer musical electronics after your wish My Best Regards Gotharman Flemming Christensen Phone 45 25 47 33 98 email info gotharman dk 31
5. Cut Adjusts the filter cutoff frequency Reso Adjusts the filter resonance Sep Separates spaces the cutoff frequency of the 2 filter blocks At the value 0 the cutoff frequency for the 2 blocks are exactly the same Fxm Wave Pw Dtun Rndm Mode Offs Rate Fxm Wave Pw Tune 0 hsaw 0 0 Gwg 2 cutoff modulation amount Filter FM Gwg 2 waveform select remote control Gwg 2 pw remote control Gwg 2 tune remote control Rndm Mode Offs Rate 66 volt 0 kev Random generator cutoff modulation amount Voltage random or pulsed random select Pulsed random offset Random generator rate When turned all the way down to zero display writes key a new random value will show every time a note on message is recieved Velo Kybd SepM SepS 0 0 0 fmdi Adjust how much recieved velocity values will influate the filter cutoff frequency Adjust how much recieved note values will influate the filter cutoff frequency Cutoff separate modulation value Cutoff separate modulation source Choices are fmd1 Filter modulator 1 fmd2 Filter modulator 2 amod Amp modulator rndm Filter random generator velo velocity kybd Note number ct20 MIDI controller 20 valu Fixed value FILTER MODULATOR 1 Push the Dec Inc buttons to toggle between the various FILTER MODULATOR 1 edit pages Modi Pol Rate A T1 D T2 S T3 R T4 Mod1 Pol Rate 18 A Loop envelope 1 filter cu
6. Out output Out 2 Jack This is a line output of voice 2 solo and needs to be amplified Connect it to an amplifier or a mixer When a jack is plugged into this voice 2 is no longer present on the Mix Out output Mix Out Jack This is a line output of voice 1 and 2 mixed together and needs to be amplified Connect it to an amplifier or a mixer The level of this output is adjusted by the volume knob on the front panel The sound pattern select page This is the default page When no knobs are lit except for the Run Stop knob the microGothar are on this page A pattern on the microGothar consist of one sound and one 16 step sequence if created in mono duo and unison modes or 2 sounds and a 2 track 16 step sequence in dual mode Select a pattern New Pattern A 01 S1 Edit Enter Run Stop Confirm Synth select Assign 1 Assign 2 Assign 3 Assign 4 oi gt Use the Dec Inc buttons to select a sound pattern and push the Enter button to confirm If you have not selected a new sound pattern and microGothar is set to be in dual mode on the gt COMMON edit pages explained later in this manual pushing Enter will toggle between Synth 1 and 2 and will show in lower right of the display as S1 and S2 When Synth 2 is selected you can use the Inc Dec buttons to select a sound for synth 2 Again you will have to push Enter to confirm before it actually changes the sound The sound selected for sy
7. Sotharrnar s mcroGOTTHAmRm Ovo LJAer Mianvual Inges Main Features 3 microGothar Structure 4 Loop Envelopes 5 Connections 6 Sound Pattern select 8 Edit pages 9 Common 10 Gwg 1 11 Gwg 2 14 Gwg 2 Modulator 16 Mixer 17 Filter 18 Filter Modulator 1 20 Filter Modulator 2 21 Amp 22 Amp Modulator 24 Sequencer pages 25 Sequencer Main 25 Sequencer Edit 27 Konb Assign 28 Save Pattern 29 microGothar Duo MIDI implementation 30 INFORMATION 31 Main Features 2 voices Can run in mono duo unison or dual synth bi timbral modes Each voice has 2 Oscillators with sync fm ringmodulator and pwm which works on all of their 16 different waveforms A high quality unique sounding analog Ipf hpf filter Overkill distortion 5 loop envelopes 2 random generators Velocity control of filter cutoff and final amp level 16 step step sequencer which is MIDI syncable is able to control 2 selectable parameters has realtime transpose and a keyboard arpeggiator mode in which you start stop and transpose the sequence via a connected MIDI keyboard Storage of 256 sounds and sequences in Microchip 24LC256 eeproms which is guaranteed to retain data for at least 200 years No need to worry about changing back up batteries MIDI control of 15 parameters Boxed small and compact easily portable EVERYTHING IS ENGINEERED BY GOTHARMAN microGothar voice structure AD Loop Envelope ADSR Loop Envelope
8. ange effects you will hear muddy bass and weak hi tones is called aliasing errors On the Gwg s I have developed a pitch shifting system that doesn t change the sample playback frequency when you shift a note but instead stretches the waveform No matter what note you play the playback frequency is allways 44 KHz which means that all aliasing errors are eliminated It sounds good in the whole note range and doesn t sound muddy in the bass area Like analog oscillators the oscillators on the microGothar is freely running They dont restart when you hit a key unless keysync is on This makes them more alive Push the Dec Inc buttons to toggle between the various GWGI edit pages Wave Pw Npit Pwm Ssaw 20 On 0 Select the waveform you want Choices are Hsaw hpfsaw when you turn the pw it acts like a high pass filtered saw wave Ssaw syncsaw with the pw you adjust the sync pitch Squ square pw adjusts the pulse width Tri triangle pw acts as phase distortion to create some strange waveforms Sine pw adds harmonics to the sine wave Sif 1 9 Sine function wave 1 9 Waveforms created out of mathematical sine functions Pw acts as a kind of wavetable Vnoi Voltage noise Ordinary noise wave Pw adjust the harmonic content The Npit parameter determines if noise is pitched or unpitched Pnoi Pulsed noise Pw sets the offset point Npit determines if it is pitched or unpitched See wave description
9. eated out of mathematical sine functions Pw acts as a kind of wavetable Vnoi Voltage noise Ordinary noise wave Pw adjust the harmonic content The Npit parameter determines if noise is pitched or unpitched Pnoi Pulsed noise Pw sets the offset point Npit determines if it is pitched or unpitched See wave descriptions Noise pitch When on the noise waves are pitched when off the noise waves are unpitched Octv Tune Fine 2 0 0 Octave switch Gwg 2 tune Gwg 2 fine tune Rate Bend Kybd Subf Ksyn Spoi Off On On 0 Selects if Gwg 2 shall respond to keyboard CV or not Gwg 2 subfrequency on off When on Gwg 2 acts as a slow running LFO Gwg 2 keysync on off When on Gwg 2 is restarted when a note on message is recieved from the MDI input or the internal sequencer Gwg 2 start point If keysync or oscillator sync is on this parameter sets where the Gwg 2 wave form will start when triggered Rate Bend 1 On Adjusts the Gwg 2 sample rate A higher value creates a lower sample rate Gwg 2 pitch bend control on off GWG2 MODULATOR Push the Dec Inc buttons to toggle between the various GWG2 MODULATOR edit pages Pite Pw Pite Pw Pitc Pw Pitc Pw 0 O Gwg 2 pitch modulation amoumt Gwg 2 pw modulation amount Gwg 2 pitch positive negative modulation Gwg 2 pw positive negative modulation Ksyn Loop A D Off Off 0 0 Gwg 2 loop envelope key sync on o
10. envelope release time Okil f Rndm 212 Okil Overkill distortion level Random modulation destination Select between overkill and amp Rndm Mode Offs Rate Rndm Mode Offs Rate 66 volt 0 key Random generator amp modulation amount Voltage random or pulsed random select Pulsed random offset Random generator rate When turned all the way down to zero display writes key a new random value will show every time a note on message is recieved 23 AMP MODULATOR Push the Dec Inc buttons to toggle between the various AMP MODULATOR edit pages Mod2 Pol Rate Dest A T1 D T2 S T3 R T4 Mod2 Pol Rate Dest 18 A Okil Amp loop envelope modulation amount Amp loop envelope polarity Amp loop envelope speed Amp loop envelope destination overkill or amp Ksyn Loop Off Off Amp loop envelope key sync on off select Amp loop envelope loop on off select Tl T2 73 T4 0 16 12 67 Amp loop envelope attack time Time 1 Amp loop envelope decay time Time 2 Amp loop envelope sustain level Time 3 Amp loop envelope release time Time 4 Sequencer pages You can start and stop the sequencer by hitting the Run Stop button no matter what sequencer synth page you are on All edits can be made even while the sequencer is running SEQ MAIN Push the Dec Inc buttons to toggle between the various SEQ MAIN edit pages Sstp Parl Par2 Lstp Sstp Par
11. ff select Gwg 2 loop envelope loop on off select Gwg 2 loop envelope attack time Time 1 Gwg 2 loop envelope decay time Time 2 MIXER Push the Dec Inc buttons to toggle between the various MIXER edit pages Gwgl Gwg2 Sync Ring 255 0 On Off Gwgl Gwg 1 level Gwg2 Gwg 2 level Sync Oscillator sync on off When on Gwg 2 syncs to Gwg 1 Ring Ring modulator on off When on Gwg 1 are ringmodulated by gwg2 Gwg2 Fm gw2 ext Gwg2 Select whether you want the gwg2 input on the filters to be gwg2 gw2 or the external audio input ext Fm Select whether you want the FM source to be gwg2 gw2 or the external audio input ext This setting will affect both FM the ring modulator and the filter FM Fxm FILTER The microGothar has a unique analogue filter engineered by Gotharman to give a crunchy sound It runs in lowpass and highpass mode at the same time and levels can be independently adjusted for these two modes The filter is made of 2 blocks on each 6 dB to give it a total roll off of 12 dB The cutoff frequency of the 2 blocks can be spaced using the Sep control Push the Dec Inc buttons to toggle between the various FILTER edit pages Cut Reso LPF HPF 66 180 80 102 Cut Adjusts the filter cutoff frequency Reso Adjusts the filter resonance LPF Adjusts the level of the Low pass contents of the filter HPF Adjusts the level of the High pass contents of the filter Cut Reso Sep 66 180 0
12. is played back in its original pitch if you hit a note above or below the middle G it will be transposed 26 SEQ EDIT Push the Dec Inc buttons to toggle between the various SEQ EDIT edit pages Step Note Velo Lengt 1 A3 127 2 Use edit knob 1 to select what step you want to edit and edit knob 2 4 to adjust the values for note velocity and length for each step If you edit a step number which is above the last step value on the sequencer main page microGothar will automaticly change the last step value to this step number Step Parl Par2 Trig 1 86 0 On Use edit knob 1 to select what step you want to edit and edit knob 2 4 to adjust the offset values of parameter 1 and 2 and whether loop envelope trigger Trig shall be on or off for each step The loop envelope trigger Trig retriggers loop envelopes in loop mode with keysync on 27 KNOB ASSIGN Assign a parameter to the turning knobs when on the sound pattern select main screen Knl Kn2 Kn3 Kn4 cut res a T 5 The choices are Wv1 Waveform GWGI1 Wv2 Waveform GWG2 Oki Overkill distortion level Cut Filter cutoff Res Filter resonance Mol Filter loop envelope 1 modulation amount Mo2 Filter loop envelope 2 modulation amount Mla Filter modulator 1 attack Mid Filter modulator 1 decay Mir Filter modulator 1 release M2a Filter modulator 2 attack M2d Filter modulator 2 decay
13. l Par2 14 1 Cut Off Last step Selects how many steps 1 16 the sequence will have You dont have to set this before you start creating a sequence it is automaticly advanced as you create the steps Start shift step Select at what step the sequence will start On pattern shift it will shift to the next pattern on the step before this Parameter 1 Select a parameter to be controlled by the sequencer The choices are off Cut Filter cutoff Reso Filter resonance Fxm Gwg 2 filter cutoff modulation amount Fmol Filter loop envelope 1 modulation amount Fmo2 Filter loop envelope 2 modulation amount Pwl Gwg 1 pw Pwml Gwg 1 pw modulation amount Fm Gwg 1 frequency modulation amount Pw2 Gwg 2 pw Tune Gwg 2 detune Spoi Gwg 2 wave startpoint if keysync or oscillator sync is on Pim2 Gwg 2 pitch modulation amount Pwm2 Gwg 2 pw modulation amount Glid Glide portamento time Okil Overkill distortion level Select a second parameter to be controlled by the sequencer Choices are the same as Parl 25 Trpn Mode Trpn Mode 0 nrm Realtime transpose the sequence up to 63 semitones up and down nrm Normal mode The sequencer starts stops whenever you hit the run stop button kyb Keyboard arpeggio mode The sequencer starts when you hit a key on a connected MIDI keyboard and stops when you release it If you hit a middle G the sequence
14. nth 2 is saved as a number when you save the sound selected for synth 1 So when you again recall a sound in synth 1 that was saved as a dual mode sound it will remember what sound was selected for synth 2 You can also select a pattern by sending a MIDI program change message from another device Since you can only select 128 programs over MIDI controller 32 can be used to switch between bank A H Ctrl 32 value less than 64 and bank I P Ctrl 32 value above 64 The 4 turning knobs can each be assigned to a parameter Edit pages Please note In dual synth mode all edits are done on the synth voice selected on the sound pattern select page See previous page in this manual Edit Page Dec Enter Run Stop CO O oO Prev Next On the edit pages you can adjust all the parameters regarding the sound the sequence the MIDI synth setup and you can save and name the pattern If you from the Pattern select page push the Edit button one time so it is lit you can use the Dec and Inc buttons to select an edit page push the Edit button once more and you can see the parameters Use the Dec and Inc buttons to select varios groups of four parameters With the 4 edit knobs you can change the parameter values Push Enter to exit edit mode and return to pattern select page If there are a star before the pattern number it means that you have edited the presence sound sequence and it is not saved If you at that moment change pattern
15. s Noise pitch When on the noise waves are pitched when off the noise waves are unpitched Pwm Octv FmSc PwSc it WE Se law wm gt IF The amount of pw modulation The source can be Gwg 2 or the AD loop envelope Octv Fm FmSc Pwsc 0 0 gw2 gw2 Octave switch Frequency modulation amount Source can be Gwg 2 or the AD loop envelope Fm source select Pwm source select Ksyn Loop Fm Pwm Off Off AD loop envelope key sync on off select AD loop envelope loop on off select Fm positive negative modulation select Pwm positive negative modulation select A D 0 0 AD loop envelope attack time AD loop envelope decay time Rate Fm Level Bend 1 0 On Rate Adjusts the Gwg sample rate A higher value creates a lower sample rate Fm Level The AD loop envelope controls the Fm amount Bend Gwg 1 pitch bend control on off GWG 2 Wave Octv Tune Fine Push the Dec Inc buttons to toggle between the various GWG edit pages Wave Pw Npit hsaw 0 On Select the waveform you want Choices are Hsaw hpfsaw when you turn the pw it acts like a high pass filtered saw wave Ssaw syncsaw with the pw you adjust the sync pitch Squ square pw adjusts the pulse width Tri triangle pw acts as phase distortion to create some strange waveforms Sine pw adds harmonics to the sine wave Sif 1 9 Sine function wave 1 9 Waveforms cr
16. toff modulation amount Loop envelope 1 polarity Loop envelope 1 speed Ksyn Loop Off Off Loop envelope key sync on off select Loop envelope 1 loop on off select Tl 1T72 73 T4 0 16 12 67 Loop envelope 1 attack time Time 1 Loop envelope 1 decay time Time 2 Loop envelope 1 sustain level Time 3 Loop envelope 1 release time Time 4 20 FILTER MODULATOR 2 Push the Dec Inc buttons to toggle between the various FILTER MODULATOR 2 edit pages Mod2 Pol Rate Dest A T1 D T2 S T3 R T4 Mod2 Pol Rate Dest 18 1 cut Loop envelope 2 modulation amount Loop envelope 2 polarity Loop envelope 2 speed Loop envelope 2 destination Cut Reso envelope 1 rate Filter fxmd level fxm Ksyn Loop s Off Off Loop envelope 2 key sync on off select Loop envelope 2 loop on off select Tl T2 73 T4 0 16 12 67 Loop envelope 2 attack time Time 1 Loop envelope 2 decay time Time 2 Loop envelope 2 sustain level Time 3 Loop envelope 2 release time Time 4 AMP Levl Velo Rate Glide If F I7 Okil Rndm Push the Dec Inc buttons to toggle between the various AMP edit pages Levl Velo Rate Glide 212 Off 1 12 The overall sound level Velocity control of amp level on off Amp envelope speed Pitch glide or portamento time A D S R O 14 100 86 Amp envelope attack time Amp envelope decay time Amp envelope sustain level Amp
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