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twisted electrons TherapSid MKII User Manual

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TherapSid MKII
USER MANUAL
January 2018
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  • Page 1 TherapSid MKII USER MANUAL January 2018 of 18...
  • Page 2 Thanks! Overview Thank you for adopDng Therapsid2, the ulDmate SID synth! About the SID chip: MOS Technology 6581/8580 SID (Sound Interface Device) is the built-in Programmable Sound Generator chip of Commodore's CBM-II, Commodore Commodore 128 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 digital sound...
  • Page 3 1- ConnecDvity & Power (rear view) TherapSid features from right to le` DC input 15V 1/8” audio inputs and outputs for both chips CV pitch input, Gate input (only acDve when in monophonic mode) MIDI input & output 3 LFO override CV inputs The Audio in enables you to run any audio signal through the SID’s filter path.
  • Page 4 2-Preset load/save Therapsid can hold 99 presets in its EPROM. 2-1 Load Press the up/down bu]ons to scroll through the presets. Preset number appears on the display. 2-2 Save You can store the current sound to any preset slot: 1: Press both preset up and down bu]ons simultaneously acDvate save mode. 2: The desDnaDon slot number will flash, press preset up or down to choose a desDnaDon slot.
  • Page 5: Pulse Width

    3- Voice SecDon Therapsid’s 3 voices are laid out across the top half of the control panel. The 3 voice strips are idenDcal in funcDonality, explained from le` to right: 3-1 Waveforms Each voice each consists of 4 waveforms: Square,Triangle,Sawtooth and Noise. Press the corresponding bu]on to enable or disable a waveform (indicated by LED).
  • Page 6 3-5 Paraphonic Mode You can acDvate paraphonic ( 3 voice) mode at any Dme by holding a waveform bu]on on voice 1 for 4 seconds. The LED displays PA indicaDng Paraphonic mode. Voices 2 and 3 and now mirror the parameters of voice 1 but can also be changed individually.
  • Page 7 3-8 Volume Envelopes ADSR The "a]ack" and "decay" of a sound have a great effect on the instrument's sonic character. ADSR envelope is specified using four parameters: • AIack 9me is the Dme taken for iniDal run-up of level from nil to peak, beginning when the key is first pressed.
  • Page 8: Filter Modes

    4- Filter The SID chips are equipped with a mulDmode resonant filter. The filter is the analog secDon of the circuit and its warm/dirty sound is what give the SID its authenDc character. 4-1 Filter Modes Press the filter bu]on to toggle through the 4 filter states: Off, Low Pass, Band Pass, High Pass, Low Pass+ High Pass (notch) 4-2 Cutoff...
  • Page 9: Lfo Waveforms

    5- LFO ModulaDon Therapsid has 3 LFOs to bring your synth to life! Note: the LFO values are also sent as midi CCs so you can modulate other synths with therapSid 5-1 LFO Waveforms There are 4 LFO shapes to choose from: Square, Triangle, Saw, Noise and Env3 (ADSR envelope of voice 3).
  • Page 10 - Press an LFO’s chain bu]on to link - The chain icon is now lit indicaDng that the LFO is linked to your target knob To unlink the LFO, simply press the link bu]on again. The chain icon will go dark again. Note: You can assign mulCple knobs to the same LFO! 5-3 Re-trigger &...
  • Page 11 6- 16 Arpeggiator Therapsid MKII has a brand new arpeggiator that is easy to use but can become wild when modulated by LFO! When acDve, the arpeggiator re-triggers LFOs The arpeggiated notes are also transmi]ed via MIDI 6-1 Arp Modes The arpeggiator has five modes: OFF, UP, DOWN, UP/DOWN, RANDOM...
  • Page 12 7- MIDI TherapSid can transmit and receive MIDI. A li]le dot at the right of the first LED digit indicates incoming MIDI, a dot at the right of the second LED digit indicates outgoing MIDI 7- 1 MIDI Channel SelecDon TherapSid can receive and send MIDI on the channel of your choice.
  • Page 13 7- 3 MIDI Preset Management You can transfer all presets to and from a computer via MIDI System Exclusive (SYSEX) transfers. This is handy to back up or share your presets with fellow TherapSid owners. To transmit (dump) SYSEX: Hold Preset Down during startup. The SYSEX is automaDcally sent out of the MIDI port.
  • Page 14 7- 4 MIDI Controller ImplementaDon Note: the knobs and buOons (AND LFOs!) send their corresponding MIDI CCs out too, so you can double therapSid as a powerful MIDI controller for other synths! MIDI Message Range Result Direction Note On/Off CH1 1-127 Trigger Voices Unison receive/send...
  • Page 15 MIDI Message Range Result Direction Control CC#2 1-127 Voice1 Pulse Width receive/send Control CC#10 1-127 Voice2 Pulse Width receive/send Control CC#18 1-127 Voice3 Pulse Width receive/send Control CC#4 1-127 Voice1 Fine receive/send Control CC#12 1-127 Voice2 Fine receive/send Control CC#20 1-127 Voice3 Fine receive/send...
  • Page 16 MIDI Message Range Result Direction Control CC#49 0-64=0 65-127=1 Voice1 Sync receive/send Control CC#50 0-64=0 65-127=1 Voice1 Ring receive/send Control CC#51 0-64=0 65-127=1 Voice2 Sync receive/send Control CC#52 0-64=0 65-127=1 Voice2 Ring receive/send Control CC#53 0-64=0 65-127=1 Voice3 Sync receive/send Control CC#54 0-64=0 65-127=1...
  • Page 17 8 - Firmware updaDng Therapsid supports firmware updates via MIDI system exclusive messages (sysex). The firmware version is displayed for 1 second on the 7segment led display during startup. Please check the therapSid page online for the latest firmware: h]p:/ /twisted-electrons.com/therapsid/ To enter update mode aka boot-loader: -unplug the unit’s power cord.
  • Page 18 9 MulD SID Although TherapSid is fully funcDonal with a single SID chip. TherapSid MKII now supports a second chip. There are 4 Fat Modes to be]er take advantage of the dual chip setup: To toggle through the Fat Modes, hold arp mode for 3 seconds.
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  • Page 19 10 SID Access and ConfiguraDon Ensure that therapSid is powered OFF. Unscrew the 4 screws and remove the trap door to access the SID chip(s). Each chip has 3 se{ng jumpers. All 3 jumpers need to be either posiDoned LEFT or RIGHT according to SID type: Carefully follow the instrucDons on the back of the trap door as follows: 6581: PosiDon all jumpers on the LEFT (pins 1-2 of the jumper sockets)
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