Instruo Saich User manual
saïch
Quad Oscillator
User Manual
2
Contents
3
Description / Features
4
Installation / Specifications
5
Overview
6
Case Tunings
9
Waveforms
10
CTRL
12
Mix Profiles Scan
Mix Profiles
15
Intervallic Offsets
17
CTRL CV Mapping
18
Frequency & Pitch
19
Frequency Modulation
20
Sub Modes
21
Pulse Width Modulation
22
Diatonic Mode
24
Patch Examples -
East Coast Synth Voice
East Coast Bass Voice
Chord Vibrato
Basic VCA
Arpeggiator
Tensions
3
Description
The Instruō saïch is a quad oscillator with super-saw functionality and
built in “smart” VCA mixing. At its core are four fully analogue sawtooth
waveforms that can be intervallically offset, individually and globally
detuned, transformed and transposed, and mixed together in creative
and interesting ways.
A perfect companion for the harmonàig quantiser, it can easily create
harmonically structured chord voicings perfect for lush subtractive
patching. Paraphonic patching in analogue with eurorack has now
become considerably more convenient!
No quad quantiser in your system? Not to worry!
saïch includes beautifully simple diatonic modes allowing for the
creation of Ionian and Aeolian chord scales with a single 1V/octave
CV source.
Features
• Quad analogue oscillators
• Smart VCA with 7 mix profiles
• Global and individual detuning
• Intervallic offsets
• Sub oscillator modes
• 1V/Oct tracking
• Linear and exponential FM
• Diatonic modes
4
Installation
1. Confirm that the Eurorack synthesizer system is powered off.
2. Locate 12 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, confirming that the red stripe on
the power cable is connected to -12V.
4. Connect the 16 pin side of the IDC power cable to the 2x8 pin
header on your Eurorack power supply, confirming that the red
stripe on the power cable is connected to -12V.
5. Mount the Instruō saïch in your Eurorack synthesizer case.
6. Power your Eurorack synthesizer system on.
Note:
This module has reverse polarity protection.
Inverted installation of the power cable will not damage the module.
Specifications
• Width: 12HP
• Depth: 27mm
• +12V:110mA
• -12V: 90mA
saïch
COARSEOUT
DETUNE
FINE
–+FM
CTRL
LIN EXP
/
1V OCT
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PWM
CV
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SUB
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saïch |saix | noun (natural sciences) a number of animate things
massed together in motion
Key
1. Output
2. Voice Indicators
3. Fader
4. CTRL Button
5. CTRL Input
6. CTRL Attenuverter
7. Global Coarse
8. Global Fine
9. Voice 2 Detune
10. Voice 3 Detune
11 . Voice 4 Detune
12. Voice 1 or Global 1V/Oct
13. Voice 2 1V/Oct
14. Voice 3 1V/Oct
15. Voice 4 1V/Oct
16. FM Input
17. FM Attenuator
18. Lin/Exp Toggle
19. Sub Button
20. PWM Input
21. Mix Profile Button
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12 13
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6
Case Tuning
Because saïch incorporates four fully analogue oscillator cores
with definable intervallic offsets, it can require a little assistance to
acclimatise to a new home. With today’s endless possible combinations
of power supply and module options in Eurorack, variations in -/+ 12V
power rail balance is something that might need to be compensated for.
In other words, the saïch can need tuned on a case-by-case basis
(Pun intended!).
Once saïch is installed into the system, allow the system to warm up
(10-15 min).
Once the system is warm, run through the following tuning procedure.
This procedure sets the centre frequencies for all Detune controls, as
well as octave references for the intervallic offsets. The procedure can
be done by ear using a referencing of C5, but an electronic tuner can
greatly aid the process.
Step 1
Centre all three Detune controls.
Step 2
Centre the CTRL Attenuverter and Fader. Ensure
the CTRL Button is in its unlit state (press the Mix
Profile Button to return from alternate controls)
Step 3
Hold down the CTRL Button for 3 seconds until the
Voice Indicators blink. The tuning procedure is now
active and is indicated by a blinking amber/white
CTRL Button and a flashing amber Fader.
7
Step 4
Notice that the 1st and 2nd Voice Indicators are
illuminated, and moving the Fader crossfades
between voices 1 and 2.
Step 5
With the Fader fully left, allowing only
voice 1 to be monitored, tune voice 1 to C5
(~523.25Hz / the octave above middle C)
using the Coarse and Fine knobs.
Step 6
Now move the Fader fully right to monitor voice 2.
Step 7
Use the CTRL Attenuverter to tune voice 2 to middle C5
(~523.25Hz / the octave above middle C).
Step 8
Move the Fader to its centre position to confirm the
tuning between voices 1 and 2. There should be little to
no beating.
Step 9
When satisfied with the tuning between voices 1 and 2,
press the Sub Button and Mix Profile Button at the same
time to save the tuning.
Note: Voice indicators will pulse confirming the save.
8
Step 10
Press the CTRL Button to go to the next step - tuning the
octave reference of voice 2.
Step 11
Repeat steps 5-9 but instead of tuning voice 2 to C5, tune it to
C6 (~1046.50 Hz).
Step 12
When satisfied with the tuning between voices 1 and
2, press the Sub Button and Mix Profile Button at the
same time to save the tuning.
Step 13
Now press the CTRL Button again to repeat this
process tuning voice 3 to voice 1 and voice 4 to voice
1 at both unisons and octaves.
Step 14
Once you’ve saved the final tuning (the octave
of voice 4), press the CTRL Button to exit the
tuning procedure.
9
Waveforms
Output: Mixed output
of up to four analogue
waveforms. Voice 1 can
be set to ramp, sawtooth,
or pulse waveforms,
while voices 2 through
4 only generate ramp
waveforms (See the Sub
Modes section for more
information). The mix
of amplitudes between
voices is defined by the
currently selected mix
profile (see the Mix
Profile Scan and Sub
Modes sections of the
manual for
more information).
Voice Indicators: The Voice
Indicators depict the amplitude
of each voice as brightness.
They will also temporarily
indicate which mix profile is
active (see the Mix Profile Scan
section of the manual for
more information).
VCA
OUT
VOICE WAVEFORM
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CTRL
Fader: The Fader can be used to control one of three
different parameters.
1. Mix Profile Scan (primary function)
2. Intervallic Offset (secondary function)
3. Global Detune (secondary function)
CTRL Button: The CTRL Button is used to change the behaviour of
the Fader.
If the CTRL Button is unilluminated, the Fader sets the
Mix Profile Scan position. (Pressing the Mix Profile
Button will return to this primary function)
If the CTRL Button is illuminated white, the Fader
selects the Intervallic Offset of voices 2, 3, and 4.
If the CTRL Button is illuminated amber, and an
Intervallic Offset has been selected, moving the
Fader from left to right controls the Global Detune
of each voice from unisons, to the defined
Intervallic Offset.
• All previous parameter values are retained when new parameters
are assigned to the Fader.
• Once a parameter selection has been changed moving the Fader
will activate control over the parameter.
• It is important to note that pressing the CTRL Button only switches to
the secondary functions parameters (Intervallic Offset and Global
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