Therapsid User Manual - Twisted
Contents
1. target knob and hitting snap to take a snapshot For example lets create a 4 step arp for voice 1 Set the length knob to 4 Set the step knob to 1 Set the Voice1 tune knob to 0 Press Snap Set the step knob to 2 Set the Voice1 tune knob to 3 Press Snap Set the step knob to 3 Set the Voice1 tune knob to 7 Press Snap Set the step knob to 4 Set the Voice1 tune knob to 12 Press Snap Turn on loop twisted electrons Adjust the rate knob to taste Voila You have an ascending minor arp 6 7 Clear Step Mod s parameters You can clear parameters in two ways 1 Clear selected knob only Wiggle a knob that you wish to clear from the Step Mod and hold Snap for 3 seconds This clears all steps that hold data from that knob 2 Clear all Step Mod data Hold snap for 6 seconds to completely reset the Step Mod twisted electrons 7 Midi implementation Note On Off CH1 Note On Off CH2 Note On Off CH3 Note On Off CH4 Control CC 17 Control CC 18 Control CC 19 Control CC 20 Control CC 21 Control CC 22 Control CC 23 Control CC 24 Control CC 25 Control CC 26 Control CC 27 Control CC 28 Control CC 29 twisted electrons wee Ringo Reni TT mns Fe Reti A Control CC 46 CC 46 17127 127 11 Rate 0 Rate e ce CC 47 TT 127 Pa Depth amp Mod Wheel GontrolCCH48 CC 48 GontrolCGH48 00727 127 0 2 Rate 0 Rate Control CC 49 0 127 Lfo2 Depth i twi2. 2014 11 SID Ghost Amplified mp3 http midibox org forums topic 5003 my first sid is making notes but sometimes not when i want it to If you are handy with a soldering iron a permanent fix would be to solder a capacitor on the underneath of the daughter board a solder less solution is also explained below twisted electrons c twisted electrons A surface mount 0805 Cap fits nicely between the 2 pins twisted electrons Alternatively a legged cap works thanks Hegen for the photo c twisted electrons Attempt to install the capacitor without soldering was successful by shortening the legs bending by a 90 degree angle and trapping in the socket beneath the SID chip twisted electrons c twisted electrons
3. User Manual Last update Jan 5th 2015 twisted electrons Thanks Overview Thank you for adopting Therapsid the ultimate SID synth therapsid twisted electrons About the SID chip The MOS Technology 6581 8580 SID Sound Interface Device is the built in Programmable Sound Generator chip of Commodore s CBM Il Commodore 64 Commodore 128 and Commodore MAX Machine home computers It was one of the first sound chips of its kind to be included in a home computer prior to the digital sound revolution Read more http en wikipedia org wiki MOS Technology SID 1 Connectivity A Power rear view dc in midi in TherapSid features 1 4 audio input and output a MIDI input and a power socket The Audio in enables you to run any audio signal through the SID s filter path Therapsid is equipped with a bridge rectifier so can be powered by any AC or DC voltage source of 15v 1200mA c twisted electrons 2 Preset load save Therapsid can hold 100 presets in its EPROM 2 1 Load Press the up down buttons to scroll through the presets Preset number appears on the display 2 2 Save Press both preset up and down buttons simultaneously to save the current preset Therapsid comes loaded with 100 presets to get you started 0 9 Assorted demo presets 10 19 Basses O 20 29 Leads un 30 39 Chords O O 40 49 Pads Q 9 50 59 Sequences o 60 69 Arps DF 70 79 Rhythmic
4. der into the frame of SysEx Librarian if it s not already in there 4 Select it with the mouse 5 Click Play During upload the LEDs will flash in different patterns for approx 40 seconds then your Therapsid will boot into the new software twisted electrons 9 Opening Chip Swap Therapsid can easily be opened from behind No need to unscrew front panel or remove knobs 9 1 Opening Step1 Remove the plastic Jack nuts twisted electrons Step 2 Remove the 7 screws from the underneath panel Dur Step 3 Carefully lift the unit out as a vvhole c twisted electrons 9 2 Chip Swap Now opened the TherapSid reveals the daughter board with the SID socket you should also find a small plastic bag containing the capacitors for the 8550 6582 family of SID GO Aa kosa REA 13017 L le 6582 19 You need to change 2 things to set therapSid for 6581 default setting or 8550 6582 settings JUMPER for power selection Must be on position 1 2 for 6581 default setting Must be on position 2 3 for 8550 6582 Filter Caps 470p for 6581 default setting c twisted electrons 22nF for 8550 6582 included in separate bag Caps don t require soldering but a little hot glue is recommended to secure them 10 Controller App 2 Ant PBPPP A 890 TherapSid pw2 pw3 cutoff TherapSid can be controlled by its on app Download the latest version for free u
5. eld the 3 glide settings will override the glide knobs 3 6 Sync When set on voice1 Synchronizes the fundamental frequency of Oscillator 1 with the fundamental frequency of Oscillator 3 producing Hard Sync effects Varying the frequency of Oscillator 1 with respect to Oscillator 3 produces a wide range of complex harmonic structures from Voice 1 at the frequency of Oscillator 3 In order for sync to occur Oscillator 3 must be set to some frequency other than zero but preferably lower than the frequency of Oscillator 1 No other parameters of Voice 3 have any effect on sync 3 7 Ring Mod When set replaces the Triangle waveform output of Oscillator 1 with a Ring Modulated combination of Oscillators 1 and 3 Varying the frequency of Oscillator 1 with respect to Oscillator 3 produces a wide range of non harmonic overtone structures for creating bell or gong sounds and for special effects In order for ring modulation to be audible the Triangle waveform of Oscillator 1 must be selected and Oscillator 3 must be set to some frequency twisted electrons voice voice voice3 gw D S R tune fine glide Sma A 3 8 Volume Envelopes ADSR The attack and decay of a sound have a great effect on the instrument s sonic character ADSR envelope is specified using four parameters Attack time is the time taken for initial run up of level from nil to peak beginning when the key is first pressed Decay time is
6. er 5 2 Assigning LFOs to knobs Therapsid has 3 LFOs that can be assigned aka linked to the following knobs Filter Cutoff Filter Resonance Voice1 Pw Voice2 Pw Voice3 Pw Voice1 Tune Voice1 Fine Voice2 Tune Voice 2 Fine Voice3 Tune Voice3 Fine amp mod speed Assigning an LFO to a knob is very easy SH Wiggle the target knob choose from the above list Press an LFO chain button to link O twisted electrons The chain icon is now lit indicating that the LFO is linked to your target knob To unlink the LFO simply press the link button again The chain icon will go dark again Note You can assign multiple knobs to the same LFO 5 3 Re trigger amp Loop The LFOs don t necessarily have to loop you can also O loop use them as one shot envelopes useful for pitch decay of percussive sounds for example Press the loop button towards the bottom right of the control to toggle the looping On Off The LFOs can also be re triggered on every key press Press the retrig button towards the bottom right of the control to toggle the re triggering On Off twisted electrons Oe s p step rate length O 1 step mod 6 16 Step Modulator Therapsid s 16 Step Mod is a great way to sequence parameters if you need more in depth control 6 1 Step The Step knob is used to select the current step to be edited This will be useful later on for recording data into the Step Mod You ca
7. melodic 80 89 Percussion Drums 90 99 Sound effects These presets are just to get you started they are all re writeable Note The presets were created using the 6581 variant of the SID chip They could sound different on other SID variations twisted electrons voice voice voice3 fine glide 3 Voice Section Therapsid s 3 voices are laid out across the top half of the control panel The 3 voice strips are identical in function explained from left to right 3 1 Waveforms Each voice each consists of 4 waveforms Square Triangle Sawtooth and Noise Press the corresponding button to enable or disable a waveform indicated by LED Note Multiple waveforms can be active at the same time 3 2 Pulse Width knob The pw knob adjusts the duty cycle of the square waveform Note this has no effect on the other waveforms only square 3 3 Tune The tune knob transposes the voice in semitone increments The tune ranges from 12 to 12 semitones 2 octaves indicated by the 7 segment LED display i twisted electrons voice voice voice 3 fine glide O mo A pw tune D 5 A 3 5 Glide A Pedal Glide Adds glide aka portamento to the synth s pitch More glide longer portamentos slides Pedal glide allows you to switch glide on off during a performance To set the pedal glide values hold the sustain pedal down while positioning the glide knobs to taste Whenever the sustain pedal is h
8. n also scrub through the mod steps in real time with this knob Note The range of steps that you ca select is limited by the Step Mod s length 6 2 Rate The Rate knob is used to change the speed of the Step Mod Note Step Mod will sync to a midi clock the rate knob then becomes a scaler of the incoming clock 6 3 Length The length knob defines the number of steps to sequence The length ranges from 1 to 16 steps indicated by the LED 7 Segment Display 6 4 Retrig Similarly to the LFOs the Step Mod can be reset on key press when retrig is lit Simply click the retrig button to toggle it On Off O retrig 6 5 Loop You can also choose to have the Step Mod stop when O loop it reaches its last step or Loop indefinitely if loop is lit Simply click the loop button to toggle it On Off twisted electrons IMPORTANT Make sure that the Step Mod is in focus by wiggling either of its 3 knobs so that you aren t accidentally setting the retrig or loop of a previously selected LFO 6 6 Recording parameters into the Step Mod These are the parameters that can be sequenced by the Step Mod Filter Cutoff Filter Resonance Voice1 Pw Voice2 Pw Voice3 Pw Voice1 Tune Voice2 Tune Voice3 Tune Voice1 Glide Voice2 Glide Voice3 Glide LFO1 Rate LFO1 Depth LFO2 Rate LFO2 Depth LFO3 Rate LFO3 Depth Wave shape Ring amp Sync for all voices It is very easy to use the Step Mod It s as simple as selecting a step wiggling a
9. nto my DAW on one track and directly out to therapSid with the keyboard messages on another track Remember that the iPad messages are on channel 16 twisted electrons 10 3 Operation all versions 800 l TherapSid o N Midi Output Port B M Audio Tip first ensure that you have the step mod in loop mode on therapSid or it will only fire once when you hit run Also remember to set Rate and Length knobs to your liking Hit run to trigger a note on therapSid this can also be done with a midi keyboard Now you can input content into the 16 steps of each register twisted electrons Tune1 Tune2 Tunes Pw1 Pw2 Pw3 Cutoff Clicking a readily lit box will disable it for that step therapSid returns to its default setting for that step 11 VCA bug aka Stuck Notes Some SIDs are presenting a clock issue that produces stuck notes aka broken vca that can be fixed by installing a 1nF capacitor between pins 6 and 7 of the SID AII units shipped after Oct 20th 2014 include this fix IMPORTANT The VCA bug should not be confused with the VCA bleed through aka ghost notes that are a well known perk of the SID chips discussed in the forum thread linked below The bleed through however is only heard at a fraction of the main volume and can be filtered out by closing the filter in LP Here is a recording the the 6581 Ghost notes amplified to stand out http twisted electrons com wp content uploads
10. sing the links below Pc Mac Linux htto twisted electrons com wp content uploads 2014 09 therapSid zi iPad app store httos itunes apple com us app therapsid id918973634 mt 8 The app is used as a remote control to populate the step mod s memory twisted electrons You can edit the waveform tune and pulse width of all 3 voices and also modulate the filter cutoff 10 1 Setup PdMadOsx The app talks to therapSid via midi control changes on channel 16 Please make sure to have your midi device plugged into your computer before launching the app Once open you can select the midi output device by clicking the gt icon below the screen This scrolls through your available devices 10 2 Setup iPad The app talks to therapSid via midi control changes on channel 16 You can use either midi over wifi or an iPad compatible usb midi interface connected via the camera connection kit For help setting up wifi midi check out these great tutorials Mac Windows Pc http www synthtopia com content 2013 08 10 how to setup wireless midli between ipad windows Effective version 2 update pending apple approval at the time of writing you can control therapSid with the iPad alone thanks to the added run button but it is recommended to route both iPad and midi keyboard to therapSid for maximum flexibility twisted electrons Suggested iPad Setup usually have the iPad midi signal coming i
11. sted electrons Control CC 50 0 127 Lfo3 Rate Control CC 51 0 127 Lfo3 Depth mns ge Rei TT twisted electrons Control CC 71 CCH71 Control CC 71 0640 65 127 1 64 0 65 127 1 Voice3 Noise 0 Noise Control CC 72 0 OFF 1 41 LP Filter Mode 42 84 BP 85 127 HP 8 Firmware updating Therapsid supports firmware updates via midi system exclusive messages sysex Since version 3 released Jan 5th 2015 the firmware version is displayed at startup on the 7segment led display Please check the therapSid page online for the latest firmware http twisted electrons com therapsid To enter update mode aka boot loader unplug the unit s power cord hold the filter type button down bottom left of control panel while plugging the unit power back in Every other LED on the control panel will be lit indicating that boot loader mode is active and ready to receive the sysex from your computer 8 1 Pc For a windows pc we recommend MIDI OX It is a free and very useful app 1 Launch MIDI OX 2 In the Sysex window choose Command gt Window gt Load File and navigate the location where you stored the file 3 Choose Command Window gt Send Sysex i twisted electrons 8 2 Mac For a mac we recommend SysEx Librarian It is also free 1 Launch SysEx Librarian 2 Select your MIDI interface in the drop down menu at the top if it s not already selected 3 Drag the MIDI SysEx file from the Fin
12. the time taken for the subsequent run down from the attack level to the designated sustain level Sustain level is the level during the main sequence of the sound s Sustain lt 5 gt u Period Peak Amplitude Intermediate Level Zero Amplitude i twisted electrons Filter hp cut res 4 Filter The SID chips are equipped with a multimode resonant filter The filter is the analog section of the circuit and its warm dirty sound is what give the SID its authentic character 4 1 Filter Modes Press the filter button to toggle through the 4 filter states Off Low Pass Band Pass High Pass 4 2 Cutoff The cut knob adjusts the filter cutoff frequency 4 3 Resonance The res knob adjusts the filter s resonance Note Depending on the type of SID chip installed resonance can have more or less effect twisted electrons Ifo shape rate 5 LFO Modulation Now that we can set up voices and have played with the filter it s time to modulate Therapsid has 3 LFOs to bring your synth to life 5 1 LEO Waveforms Therapsid offers 4 LFO shapes to choose from Square Triangle Saw and Noise and none Let s change an LFO s shape Wiggle either of the 3 LFO s depth or rate knobs to select that LFO Press the Ifo shape buttons to change the selected LFO s shape You can also assign no shape at all by pressing an readily lit shape In this case the LFO s depth knob becomes a fixed controll
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