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Tš-L
Oscillator
User Manual

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Summary of Contents for Instruo Ts-L

  • Page 1 Tš-L Oscillator User Manual...
  • Page 2: Table Of Contents

    Contents Description / Features Installation / Specifi cations Overview Waveforms Frequency / Pitch Pulse Width Modulation Frequency Modulation Wavefolding Soft Syncronistation / Phase Locking Patch Examples...
  • Page 3 Description The Instruō Tš-L is a fully analogue voltage controlled oscillator with a plethora of features in a very small footprint. Its triangle core circuitry allows for extremely consistent waveforms over a wide frequency range. The triangle foundation is used to generate its sine waveform which holds consistent shape and amplitude across Tš-L’s wide range.
  • Page 4 Installation 1. Confi rm that the Eurorack synthesizer system is powered off. 2. Locate 6 HP of space in your Eurorack synthesizer case. 3. Connect the 10 pin side of the IDC power cable to the 2x5 pin header on the back of the module, confi rming that the red stripe on the power cable is connected to -12V.
  • Page 5 Tš-L ti - z-εl proverb (siri) “this sauce later rocks” COARSE ARSE FINE 1V/OCT SYNC PULSE FOLD SYMMETRY Tš-L 1. Square Output 1 1. PWM CV Attenuverter 2. Sub Toggle 12. PWM Waveform Crossfade 3. Triangle Output 13. FM Input 4.
  • Page 6 Waveforms Square Output: Square waveform output. Sub Toggle: Sub Toggle determines the octave of the square waveform. • If the toggle is set to the right position, the frequency of the square waveform is set to one octave below the fundamental frequency of the oscillator.
  • Page 7: Frequency/Pitch

    Frequency/Pitch Coarse: Coarse knob controls the fundamental frequency of the oscillator. It determines the pitch of all waveforms. • Turning the knob anticlockwise will decrease the frequency. • Turning the knob clockwise will increase the frequency. Fine: Fine knob is used for minute control of the oscillator’s fundamental frequency and is relative to the frequency value set by the Coarse knob.
  • Page 8: Pulse Width Modulation

    Pulse Width Modulation PWM: The parameter controls the width of the pulses for the PWM waveform. • Turning the knob anticlockwise will decrease the width of the pulses. • Turning the knob clockwise will increase the width of the pulses. PWM CV Input: The PWM CV Input...
  • Page 9: Frequency Modulation

    Frequency Modulation FM Input: FM Input is a bipolar control voltage input for the frequency parameter of the oscillator. • Control voltage is summed with the values set by the Coarse Fine knobs and scaled by the Attenuator. FM Attenuator: FM Attenuator determines the depth of frequency modulation applied to the fundamental frequency.
  • Page 10: Wavefolding

    Wavefolding Wavefold: Wavefold knob controls the amount of wavefolding applied to the waveform produced at the Wavefold Output. • A parallel sine waveform is used by the wavefolder. • Turning the knob fully anticlockwise results in a waveform that resembles a sine waveform. •...
  • Page 11: Soft Syncronistation / Phase Locking

    Soft Synchronisation/Phase Locking • Soft Sync Input: Tš-L implements Soft Synchronisation. • This is also known as Frequency Lock or X-Lock. • The oscillator’s core triangle waveform changes its charge direction when clocked. • When tuning the oscillator to an external signal, the Soft Sync Input can be used to phase lock the signals to remove beat frequencies in unison and perfect interval tunings.
  • Page 12 Patch Examples East Coast Synth Voice: Summary: Tš-L The sequencer or keyboard sends voltages to while simultaneously triggering the envelope generator. The CV output of the envelope generator opens the fi lter and VCA, allowing Tš-L’s signal to pass through. More traditional East Coast patches would incorporate separate envelope generators for the fi...
  • Page 13 • Set the fundamental frequency of Tš-L to a desired position. • Set the individual levels of the mixer to desired positions. • Set the cutoff frequency of the fi lter to a desired position. • Set the resonance of the fi lter to a desired position. •...
  • Page 14 FM Synth Voice: Summary: Modulator The secondary oscillator, called the in an FM patch, is modulating the frequency of Tš-L, called the Carrier in an FM patch. The sequencer or keyboard sends voltages to Tš-L while simultaneously triggering the envelope generator. The CV output of the envelope generator opens the fi...
  • Page 15 • Set the FM Attenuator to a desired position. • Set the Lin/Exp Toggle to a desired position. • Most East Coast synthesizers were traditionally limited to linear frequency modulation only.
  • Page 16 Folded PWM Synth Voice: Summary: PWM Output Wavefold CV Input Connecting the to the PWM knob/PWM CV allows for four levels of timbre control via the Input, the PWM Waveform Crossfade Wavefold knob, the knob, and Symmetry Bias knob. The sequencer or keyboard sends voltages Tš-L while simultaneously triggering the envelope generator.
  • Page 17 Control Path: • East Coast Synth Voice Create an control path. • Pulse Output Wavefold CV Input. Connect the to the • Set the knob to a desired position. • Set the PWM Waveform Crossfade knob to a desired position. Manual Author: Collin Russell Manual Design: Dominic D’Sylva This device meets the requirements of the following standards: EN55032,...