Summary of Contents for twisted electrons TherapSid MKII
TherapSid MKII User Manual June 2017 1 of 18...
Thanks! Overview Thank you for adopting Therapsid2, the ultimate 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 the...
1- Connectivity & Power (rear view) TherapSid features from right to left DC input 15V 1/8” audio inputs and outputs for both chips CV pitch input, Gate input (only active 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.
2-1 Load Press the up/down buttons 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 buttons simultaneously activate save mode. 2: The destination slot number will ﬂash, press preset up or down to choose a destination slot.
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 functionality, 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).
3-5 Paraphonic Mode You can activate paraphonic ( 3 voice) mode at any time by holding a waveform button on voice 1 for 4 seconds. The LED displays PA indicating Paraphonic mode. Voices 2 and 3 and now mirror the parameters of voice 1 but can also be changed individually.
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.
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, Low Pass+ High Pass (notch) 4-2 Cutoff The cut knob adjusts the ﬁlter cutoff frequency...
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). -Move either of the 3 LFO’s depth or rate knobs to select that LFO.
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 & Loop The LFOs don’t necessarily have to loop, you can also use them as “one shot” envelopes, useful for pitch decay of percussive sounds for example.
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 The arpeggiated notes are also transmitted via MIDI 6-1 Arp Modes The arpeggiator has ﬁve modes: OFF, UP, DOWN, UP/DOWN, RANDOM press the mode button to toggle through the available modes (displayed on the 7 segment LED display).
7- 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 7- 1 MIDI Channel Selection TherapSid can receive and send MIDI on the channel of your choice.
7- 3 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 receive/send...
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...
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...
8 - Firmware updating 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: http://twisted-electrons.com/therapsid/ To enter update mode aka boot-loader: -unplug the unit’s power cord.
9 Multi SID Although TherapSid is fully functional with a single SID chip. TherapSid MKII now supports a second chip. There are 4 Fat Modes to better take advantage of the dual chip setup: To toggle through the Fat Modes, hold arp mode for 3 seconds.
10 SID Access and Configuration 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 setting jumpers. All 3 jumpers need to be either positioned LEFT or RIGHT according to SID type: Carefully follow the instructions on the back of the trap door as follows: 6581: Position all jumpers on the LEFT (pins 1-2 of the jumper sockets)