Instruo Saich User manual

saïch
Quad Oscillator

SUB BUTTON
CTRL BUTTON
DETUNE CONTROLS
VOICE AMPLITUDE INDICATORS
OUTPUT
MIX PROFILE BUTTON
CASCADE CROSSFADE
BASIC VCA
VOICE ARPEGGIATOR
VOICE SUBTRACTION
ODDS AND EVENS
SMART PAIRS
CONSTANT ROOT
1V/OCT INPUTS
PWM CV INPUT
CV INPUT &
ATTENUVERTER
GLOBAL COARSE
FREQUENCY
GLOBAL FINE
FREQUENCY
FADER
MIX PROFILE SCAN
INTERVALLIC OFFSET
GLOBAL DETUNE
EXP
LIN EXP
Overview

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.
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.
Step 4
Notice that the 1st and 2nd Voice Indicators are
illuminated and moving the Fader crossfades
between voices 1 and 2. Voice 1 is always the
reference frequency.
Step 5
With the Fader fully left, allowing only voice
1 to be monitored, tune oscillator 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 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.
Step 10
Press the CTRL Button to go to the next step - tuning the
octave of voice 2.

Step 11
Repeat steps 5-9, but instead of tuning voice 2 to C5, tune it to
C6 (~1046.50Hz).
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.

SUB Button
The Sub Button cycles through four waveform/sub options
for oscillator 1. Selection is indicated by the CTRL button LED.
Sub Mode 1: Quick white
upward pulse. Fundamental
sawtooth wave.
Sub Mode 2: Slow white
downward pulse. Inverted
sawtooth wave dropped one octave.
Sub Mode 3: Slowly blinks
white. Square wave dropped
one octave.
Sub Mode 4: Slowly flashes
between white and amber.
Pulse wave with PWM dropped one octave.

CTRL Button
The CTRL Button is used to set the behavior of the Fader.
If the CTRL Button is unilluminated, the
Fader sets the Mix Profile Scan position.
(Primary Function)
If the CTRL Button is illuminated white, the
Fader sets the Intervallic Offset of voices 2,
3, and 4. (Secondary Function)
If the CTRL Button is illuminated amber and
an Intervallic Offset has been set, moving the
Fader from left to right controls the Global
Detune of each voice from unison to their
fully spread position. (Secondary Function)

Mix Profile Button
Pressing the Mix Profile Button cycles through the seven mixing
profiles. Profile selection is depicted in binary on the Voice Indicators.
To quickly default to the Cascade Crossfade
mix profile, press and hold the Mix Profile
Button (1) and then press the Sub Button (2).
Mix Profiles
Once a mix profile is selected the Fader scans through the mix profile.
Cascade
Crossfade
Basic VCA
1
2

Voice
Arpeggiator
Voice
Subtraction
Odds to Evens
Smart Pairs
Constant Root