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twisted electrons TherapSID User Manual

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TherapSID
USER MANUAL
Note: All functions apply to MKII and MKIII
May 2nd 2023
1
of 23

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Summary of Contents for twisted electrons TherapSID

  • Page 1 TherapSID USER MANUAL Note: All functions apply to MKII and MKIII May 2nd 2023 of 23...
  • Page 2 MOS_Technology_SID I want to express my gratitude to several people who have made TherapSID what it is. First and foremost, a special thanks goes out to Windfisch for completely overhauling the code and providing invaluable guidance and mentorship throughout the process.
  • Page 3 Connectivity & Power (rear view) TherapSID features from right to left -Power input: TherapSID requires a centre positive DC voltage source of 15v at least 200mA -1/4” audio inputs and outputs for both chips (mono TS) -MIDI input & output -CV pitch input, Gate input (1/8”...
  • Page 4 Presets TherapSID comes preloaded with a total of 99 assorted presets get you started. It is important to note that these presets are fully customisable and can be modified to suit individual preferences. It is worth mentioning that the presets were developed specifically using the 6581 variant of the SID chip.

  • Page 5: Pulse Width

    Voice Section TherapSID’s 3 voices are laid out across the top half of the control panel. The 3 voice strips are identical in functionality, explained from left to right: Waveforms Each voice each consists of 4 waveforms: Square,Triangle,Sawtooth and Noise.
  • Page 6 Paraphonic Mode TherapSID has two voicing modes: unison and paraphonic. In unison mode, you can play a single note at a time. This will trigger the 3 voices at once. Paraphonic mode allows you to play up to three different notes simultaneously by splitting the 3 voices into separate notes.
  • Page 7 Auto Chord To use the auto chord feature on the TherapSID, please follow these instructions: 1- Hold down a chord on your MIDI keyboard. 2 - While still holding the chord, press and hold the arp mode and press the retrig button to engage the auto chord feature.
  • Page 8 Ring Mod When set to voice 1 or 3, replaces the Triangle waveform output of that voice with a “Ring Modulated” combination of Oscillators 1 and 3. When set to voice 2, replaces triangle waveform output of voice2 with a “Ring Modulated”...

  • Page 9: Filter Modes

    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 contributes to the authentic SID character. Filter Modes Press the filter button to toggle through the 4 filter states: Off, Low Pass, Band Pass, High Pass, Low Pass+ High Pass (notch) Cutoff The cut knob adjusts the filter cutoff frequency...

  • Page 10: Lfo Waveforms

    Modulation (LFO) TherapSID has 3 LFOs to bring your synth to life! Note: the LFO values can also be transmitted as midi CCs to modulate other MIDI capable instruments. LFO Waveforms There are 5 LFO types to choose from: Square, Triangle, Saw, Noise and Env3 (ADSR envelope of voice 3).
  • Page 11 LFO with an external source. The expected CV range is 0-5v Arpeggiator TherapSID MKII has a brand new arpeggiator that is easy to use but can become wild when modulated by LFO! When active, the arpeggiator re-triggers LFOs...
  • Page 12 Arp Modes The arpeggiator has 7 modes that you can access by pressing the mode button. The currently selected mode is displayed on the LED display. Here's a description of each mode: Up: The arpeggiator will play all held notes in a loop, starting from the lowest note and moving up.

  • Page 13: Midi Channel Selection

    MIDI TherapSID can transmit and receive MIDI. A little 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 MIDI Channel Selection TherapSID can receive and send MIDI on the channel of your choice.
  • Page 14 Hold Preset Down during startup. The SYSEX is automatically sent out of the MIDI port. To receive SYSEX: Hold Preset Up during startup. TherapSID will enter SYSEX receive mode, indicated Re on the LED display panel. You can now send the SYSEX you previously dumped to TherapSID.
  • Page 15 MIDI Controller Implementation Note: the knobs and buttons (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...
  • Page 16 MIDI Message Range Result Direction 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 Control CC#5 1-127 Voice1 Glide receive/send Control CC#13...
  • Page 17 MIDI Message Range Result Direction Control CC#39 0=off 1=on Voice1 Saw receive/send Control CC#40 0=off 1=on Voice1 Noise receive/send Control CC#41 0=off 1=on Voice2 Rect receive/send Control CC#42 0=off 1=on Voice2 Triangle receive/send Control CC#43 0=off 1=on Voice2 Saw receive/send Control CC#44 0=off 1=on...
  • Page 18 2. Download current settings: After selecting the MIDI input and output ports, press the "Read" button to download the current settings from your TherapSID device. This will allow you to view the current settings and make changes if necessary. 3. Change parameters: Once you have downloaded the settings, you can change any parameters that you want.

  • Page 19: Firmware Updates

    4. Update the device settings: After making any desired changes, press the "Write" button to update the device with the new settings. This will ensure that the TherapSID is configured with your desired settings. Firmware updates TherapSID can receive firmware updates through MIDI system exclusive messages (sysex).
  • Page 20 Navigate to the location where you have stored the firmware update file. Click on Command again and select Window > Send Sysex. This will send the firmware update to your TherapSID. Please make sure the Therapsid is in boot-loader mode and connected to your computer via MIDI before sending the sysex file.
  • Page 21 SID Access and Configuration Ensure that TherapSID is powered OFF. Remove the 6 screws from underneath the unit using a 2mm Allen key. You can now remove the bottom part of the chassis to access the SID chip(s). IMPORTANT: Be careful not to cross thread the screws upon reassembly! Use the Allen key to recenter the brass posts within the holes if necessary.
  • Page 22 When installing SID chips into your TherapSid, make sure to follow these guidelines: The C-shaped notch on the chip should be pointing to the left. The print on the SID chips should be oriented as shown in the photo above.
  • Page 23 Removing chips To remove a SID chip from your TherapSid, follow these steps: Gently lever the chip up on one side, lifting it to about a 30-degree angle. Slide a flat-blade screwdriver under the chip to help lift it straight from underneath.

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