Positive Grid BIAS MODULATION User manual

BIAS
MODULATION
Product Manual

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INTRODUCTION
First and foremost, thank you for purchasing BIAS Modulation, the
world’s first cross-platform Modulation pedal! BIAS Modulation lets
you quickly and easily design thousands of custom Modulation
pedals from scratch. It can be seamlessly integrated with BIAS
Pedal Modulation software (on both mobile and desktop platforms).
For all you hardware enthusiasts out there, our BIAS Pedal software
provides a virtual workshop for you to build your own modulation
pedals inside and out. From the time-based modulation to the
amplitude modulation, all the custom designs for modulation pedals
you can ever imagine are possible for you to create.
Before you plug in your guitar and start jamming, please take the
time to review this owner's manual and go over some of the basics
about the pedal.
CONTENTS
BIAS Modulation
Introduction 1
Getting started 5
Overview 9
Function and operation 11
Within the box
Connect to a power source
Signal Connection
Connect with BIAS Pedal app
Mono & Stereo
Engage & Bypass
Save Preset
Assign Footswitch
Modulation Modules
LFO
Tap Tempo and BPM
Expression Pedal
Calibration
MIDI
Factory Reset
Control Panel
Footswitch Panel
Rear Panel

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BIAS Pedal
Introduction 22
How to get BIAS Pedal 23
BIAS Pedal user interface 27
Preset menu 31
Save Presets 32
Noise Gate 43
Amp Room 44
Signal path 33
ToneCloud 45
Settings 47
Connect with BIAS Delay 49
Redeem & Activate My Software
Buy BIAS Pedal on Apple App Store
Desktop Version
Mobile Version
How to preview presets on ToneCloud
Download presets from ToneCloud
Desktop version
Mobile version
Custom Panel
Module 1 (Time-based modulation)
Module 2 (Amplitude)
Power Module
EQ (Equalizer)
Remote Mode
Device Preset Menu
Store presets to BIAS Delay
Device Setting Menu
Firmware Upgrade
Others
Warranty 53
End User License Agreement 58

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GETTING STARTED
Connect to a power source
A 9V DC power adapter or a USB port
(using a Micro USB cable) can power
BIAS Modulation. You’ll find both power
connections on the pedal’s rear panel.
To power the unit with a 9V DC adapter,
insert the power plug and connect the
power adapter to an electrical outlet.
To power the unit via a USB port, insert
the Micro USB cable into the pedal and
connect the other end to a USB port on
your laptop or desktop computer.
During the booting stage, all LEDs on
the control panel will flash red and blue,
indicating that the pedal is booting up.
Red & Blue Lights
Red & Blue LightsRed Lights
Signal Connection
Here are two basic ways to connect BIAS
Modulation in your signal chain.
1. Place the pedal in the signal chain
before your guitar or bass amplifier. This
will produce the pedal’s modulation
effects before the signal enters the
amplifier. Make sure to keep the pedal’s
gain low with this setup or the sound
might get out of control.
2. If you have an amplifier that comes with
an effect loop, you can connect BIAS
Modulation to the effect loop to create
modulation effects between the amp’s
preamp and power sections. In this
setup, your modulation effect will be
applied after the gain/overdrive stage and
will typically sound more natural than with
the first setup noted above.
*Note: BIAS Modulation provides either True Bypass or
Buffer Bypass for you to choose from (please refer to the
Bypass Mode section of this manual). If you have a lengthy
cable and a long signal path and want to preserve high
frequencies, Buffer Bypass will be most suitable for your
needs. On the other hand, if you want to tone down the
harsh top end of your sound, True Bypass might fit your
needs better.
*Note: When the pedal is on, the wireless LED will begin to
pulse softly, indicating that the pedal is on standby and
ready for use.
Within the box
Please carefully review each item in the box:
・BIAS Modulation ・9V DC power adapter ・Micro USB cable
・Quick Start Guide ・Redeem card for BIAS Pedal Modulation Pack ・Optional rubber feet

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Connect with BIAS Pedal app
BIAS Modulation comes with a license for
BIAS Pedal - Modulation Pack (desktop
software). You can redeem the software
code on our store page (see the Redeem
& Activate My Software section of this
manual). In addition to BIAS Pedal
(desktop), there’s also a mobile version of
BIAS Pedal for iPad (sold separately).
To connect with the BIAS Pedal desktop software, simply connect BIAS Modulation to your computer
using the supplied Micro USB cable and launch the BIAS Pedal software. BIAS Modulation will
automatically connect with the BIAS Pedal software and initiate Remote Mode (see the Remote
Mode section of this manual).
*Note: If BIAS Pedal mobile is unable to detect your BIAS Modulation pedal, please check that the wireless function is turned on and
reconnect again. Also try bringing your mobile device closer to the pedal.
To connect with BIAS Pedal mobile, turn on the
Wireless function on BIAS Modulation by engaging
the Wireless button on the rear panel. The LED will
start to blink, indicating that the pedal is now in
pairing mode and ready for connection.
Next, launch BIAS Pedal mobile. Go to Settings =>
Connect. BIAS Pedal mobile will begin searching for
an active BIAS Modulation pedal nearby and
connect with the pedal automatically once it finds it.

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OVERVIEW
Control Panel
・Preset knob
Controls the currently engaged preset. Once
a parameter changes, the LED will start to
blink, indicating that a change has been
made to the current preset. Long-press the
Preset knob again to save your changes.
BIAS Modulation comes with 20 presets in
total, with 10 presets assigned to each bank.
Press the knob to switch between the 1st
bank (red) and 2nd bank (blue).
・DEPTH
Controls the depth of the primary LFO (BIAS
Modulation also includes a secondary LFO,
which is discussed later in this manual).
・RATE
Controls the speed of the primary LFO.
・INTENSITY
Controls the level of the modulation effect.
・TONE
Controls a “tilt” filter (bipolar shelving filter).
Turning the Tone control clockwise from its
noon position attenuates low frequencies while
simultaneously boosting highs. Turning the
Tone control anti-clockwise has the opposite
effect, boosting low frequencies while simulta-
neously cutting highs.
・TWEAK 1
The function of this control knob depends on
the module and effect type that’s engaged.
(see the Modulation Module section of this
manual).
・TWEAK 2
The function of this control knob depends on
the module and effect type that’s engaged (see
the Modulation Module section of this manual).
・LEVEL
Controls the overall output level.
・LFO
Selects among the available LFO waveforms:
Round(sine), Triangle(Saw) and Pulse(Square).
You can select from additional LFO waveforms
in BIAS Pedal software.
Footswitch Panel
Rear Panel
・Input
Stereo ¼” TS Hi-Z jacks
・Output
Stereo ¼” TS jacks
・EXP.
¼” TRS jack for an expression pedal (see the
Expression Pedal section of this manual for
more information)
・USB
Micro USB port for supplying power to the
pedal and for integrating the pedal with BIAS
Pedal (desktop) software
・MIDI In/Thru
Supports standard MIDI communication using
a 5-pin MIDI connector (see the MIDI section
of this manual for more information)
・Wireless button and associated LED
There are 3 different LED states for the
Wireless button:
>LED blinks slowly - Indicates the pedal is
on standby.
>LED blinks rapidly - Indicates wireless
connection is in pairing mode and ready to
connect with BIAS Pedal mobile.
>LED is constantly lit - IIndicates the pedal is
connecting with BIAS Pedal mobile software.
・9V DC Power Jack
Supports a 9V DC power supply with negative
tips. The minimum current draw is 270mA.
BIAS Modulation comes with footswitches labeled
A, B and C and a Tap Tempo footswitch. The A, B
and C footswitches allow you to alternately engage
and bypass presets in BIAS Modulation (see the
Footswitch Mapping section of this manual for
more information).
Yo u can tap the Tap Tempo footswitch twice, and the duration between taps will determine the
BPM value. (See the Tap Tempo and BPM sections of this manual for more information.)

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FUNCTION AND OPERATION
2. Engage & Bypass
When you first plug the power in, BIAS Modulation pedal will be in Bypass Mode , meaning
that the input signal will be passed through the pedal without any modification from the
presets’ processing. There are two different bypass types for BIAS Modulation:
A. Buffer Bypass (System default) - The signal will go through the buffer circuit and generate a
lower-impedance output signal. This allows the output signal to go through a much longer
cable without compromising high frequencies. In addition, Buffer Bypass can prevent the
common ‘pop’ noise you’d otherwise hear when engaging or disengaging a preset.
B. True Bypass - This creates a short circuit between the input and output to keep the
bypassed signal untouched as a high-impedance output signal. If you are using a cable
longer than 18.5 feet while using this bypass mode, you might get volume loss in the high
frequencies.
To engage a preset and hear its effect, press one of the A, B or C footswitches. Press the
same footswitch again to switch back to bypass mode, or press another footswitch to switch to
another preset.
1. Mono & Stereo
BIAS Modulation comes with stereo inputs and outputs. With mono input (plugging into the left
channel only), BIAS Modulation will duplicate the input signal on both channels so you can still
get stereo signal at BIAS Modulation’s outputs. This is necessary in order to hear some of
BIAS Modulation’s stereo effects panned properly. If you also plug into the pedal’s right input,
BIAS Delay will switch to stereo mode and process left and right channels independently.
3. Save Preset
Once the preset is on, you can tweak any of the knobs on the control panel to modify its
sound. The preset LED will start to blink when you move a knob, indicating that the parameter
has changed.
1. hold the preset knob
2. LED stop blinking
Preset ON 1. tweak of the knob
2. LED start to blink
To save the parameter changes, hold the preset knob until
the LED stops blinking.
To dismiss the changes, switch to another preset or switch
back to Bypass Mode.

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4. Assign Footswitch
Each footswitch can turn on or off one of the 20 presets
assigned to it in the pedal.
5. Modulation Modules
BIAS Modulation comes with two major modulation modules: time-based and ampli-
tude-based. The time-based module (Module 1) manipulates the delay time inherent in effects
such as Chorus, Phaser, Flanger and so on. The amplitude module (Module 2) dynamically
alters the amplitude (volume) of the signal, creating tremolo or panning effects. With BIAS
Modulation, you can choose to engage just one of these two modulation modules or use both
modules at once to create unique modulation effects.
When only engaging one modulation module, the knobs on the pedal’s control panel control
the module. When engaging both modulation modules at once, the knobs on the pedal’s
control panel control only Module 1 (the time-based module). The Tweak 1 & 2 knobs control
different parameters for Module 1 and Module 2:
For Module 1 (Time-based)
TWEAK 1 - Controls Feedback
TWEAK 2 - Controls Wobble speed (produced by BIAS Modulation’s secondary LFO)
For Module 2 (Amplitude)
TWEAK 1 - Controls Shift
TWEAK 2 - Controls Wobble speed (produced by the secondary LFO)
To understand how the parameters mentioned above work, see the Module 1 and Module 2
sections of this manual.
1. hold the preset knob
2. LED stop blinking
1. switch to other presets
2. LED start to blink
To assign a different preset for a footswitch, just tweak
the Preset knob to switch to another preset. The
footswitch LED will start to blink. Hold the Preset knob
until the LED stops blinking, at which point the preset
mapping will update.

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7. Tap Tempo and BPM
BIAS Modulation comes with a Tap Tempo footswitch that allows you to quickly set the BPM
value that controls the LFO rate. The elapsed time between two taps represents a beat (¼
note) and determines the BPM (beats-per-minute) value.
For example, when you tap twice in 0.5 sec :
2 taps in 0.5sec = 1 beat in 0.5 sec = 120 beats in 60 sec = 120 BPM
After producing a BPM value using Tap Tempo, you can still adjust the RATE knob to change
the note subdivision, to speed up or slow down the LFO rate. Set the RATE knob to the 12
o’clock position for a quarter note value.
6. LFO
The LFO (Low Frequency Oscillator) generates a very low frequency (below 20Hz) that
modulates signal phase to create a modulation effect. Each type of LFO waveform produces
unique characteristic in the resulting sound.
Built-in waveform types for BIAS Modulation:
・Round
・Triangle
・Pulse

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・Control
Once you’re done calibrating, the parameters will change linearly between their minimum and
maximum values when you depress the expression pedal.
8. Expression Pedal
BIAS Modulation supports expression pedals, giving you continuously variable control of
multiple parameters at once while playing live onstage or in a recording studio.
BIAS Modulation can work with expression pedals fitted with standard TRS jacks. The
expression pedal’s range of control over BIAS Modulation’s parameters is calibrated by
moving knobs on your BIAS Modulation, as is explained immediately below:
・Calibration
1. Plug in an expression pedal with a TRS cable.
2. Engage the preset you want to control with the expression
pedal.
3. Hold down the Wireless button on the rear panel to
engage calibration mode. LED A will start to blink. Set the
expression pedal to its minimum position and turn the
pedal’s knobs to their minimum values. Press footswitch A
to save the minimum parameter values for the expression
pedal. Footswitch B will automatically start to blink as you
finish calibrating the expression pedal with footswitch A.
4. Set the expression pedal to its maximum position, and
turn the pedal’s knobs to their maximum values. Press
footswitch B to save the maximum parameter values for
the expression pedal.
5. Hold down the Wireless button to leave Calibration mode.
9. MIDI
BIAS Modulation supports standard MIDI commands:
・MIDI IN - This connector receives MIDI commands from an external MIDI device. Patch the
MIDI Out connector on the external MIDI device to the MIDI IN connector on BIAS Modulation.
・MIDI THRU - BIAS Modulation will send the MIDI command it receives at its MIDI In
connector out its MIDI THRU port. You can connect MIDI THRU to another MIDI device to
receive the command from BIAS Modulation.
・MIDI Channel
The default MIDI Channel number is 1. With the BIAS Pedal app, you can select the MIDI
channel from 1-16 or select Omni (in which case the pedal will receive MIDI commands on all
channels).
Value when exp. pedal in minimum position
Value when exp. pedal in minimum position

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・MIDI Clock
BIAS Modulation supports MIDI clock. When you connect BIAS Modulation to a MIDI Clock
generator using a MIDI cable, BIAS Modulation synchronizes its BPM value to the clock
source’s tempo. You can enable or disable the MIDI Clock function in BIAS Modulation.
What is “MIDI Clock” ?
MIDI clock is a signal that is used to synchronize all connected MIDI-equipped devices,
allowing them to sync to the same tempo via MIDI. Some synthesizers, sequencers and DAWs
can work as a MIDI Clock generator, sending MIDI Clock signals to other MIDI-equipped
devices.
10. Factory Reset
Factory Reset allows you to reset your pedal back to its factory-default state. When you hold
down the Wireless button while plugging the pedal’s power in, the pedal will engage Reset
Mode. While in Reset Mode, the LED lights will continuously blink. Long-press the Wireless
button again to reset the device (the pedal will then reboot to complete the reset process), or
short-press it to leave Reset Mode. You can also reset the pedal within the BIAS Pedal app.
Items that will be reset:
・Device name
・MIDI settings
・Presets
・Bypass type
・Footswitch mappings
・Program Change
Program Change allows you to switch
presets using an external MIDI device.
Here’s how MIDI Program Change
messages are mapped to BIAS
Modulation’s presets:
PC# Preset
PC# 0 Preset 1
PC# 1 Preset 2
PC# 2 Preset 3
PC# 3 Preset 4
PC# 4 Preset 5
PC# 5 Preset 6
PC# 6 Preset 7
PC# 7 Preset 8
PC# 8 Preset 9
PC# 9 Preset 10
PC# 10 Preset 11
PC# 11 Preset 12
PC# 12 Preset 13
PC# 13 Preset 14
PC# 14 Preset 15
PC# 15 Preset 16
PC# 16 Preset 17
PC# 17 Preset 18
PC# 18 Preset 19
PC# 19 Preset 20
・Control Change
Control Change allows you to control certain
parameter using an external MIDI device’s continu-
ous controllers (“CCs”). Here’s how the continuous
controllers are mapped to BIAS Modulation’s
parameters:
CC# Control Value
CC# 40 TWEAK 1 0-127
0-127
0-127
0-127
0-127
0-3
0=off 1=on
0=up, 127=down
0=up, 127=Down
0=up, 127=down
0=first step,
127=secod step
CC# 41 TWEAK 2
CC# 10 LEVEL
CC# 11 DPETH
0-127CC# 12 INTENSITY
CC# 13 RATE
0-127CC# 14 TONE
CC# 71 LFO
CC# 60 BPM Sync
CC# 80 A Footswitch
CC# 81 B Footswitch
CC# 82 C Footswitch
CC# 83 Tap Tempo

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INTRODUCTIONBIAS PEDAL
BIAS Pedal is a multi-platform application for stompbox design and
modeling. The software lets you design your own modulation pedal
by customizing every single component, including two unique
modulation modules, the power source and filter, and even the
outer design of the pedal. You can also share your pedal with
Positive Grid’s global ToneCloud community and download
amazing pedals straight from ToneCloud.
BIAS Pedal also comes with BIAS Modulation support, allowing you
to use BIAS Pedal as an interface to customize BIAS Modulation.

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HOW TO GET BIAS PEDAL?
Redeem & Activate My Software
BIAS Modulation comes with BIAS Pedal - Modulation Pack (desktop software). Go to our website
https://store.positivegrid.com/redeem
and enter the redeem code printed on the redeem card.
Once your code has been redeemed,
go back to the store page to download
the installer and install BIAS Pedal
After the installation, you can find BIAS
Pedal in your DAW or Applications folder.
To activate your license, just log into your
ToneCloud account in BIAS Pedal via the
Settings menu. All features found in the Modula-
tion Pack will be unlocked once you log in.
System requirements for BIAS Pedal desktop
version:
System Requirement
Windows Windows 7 or later
Mac OS X 10.9 or later
Support DAW Requirements
Ableton Live 8.0 or above
Avid Pro Tools 10 or above
Apple Logic Pro 9.0 or above
Apple GarageBand 6.0.5, 10.0 or abov
Cakewalk Sonar X2 or above
Cockos Reaper 3.4 or above
Steinberg Cubase 5.0 or above
Steinberg Nuendo 4.3 or above
PreSonus Studio One Producer/Professional 2 or above

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Buy BIAS Pedal on Apple’s App Store
BIAS Pedal also comes with a mobile
version for iPad. Search for BIAS
Pedal on the App Store and down-
load the trial version for free. You get
the full-featured version of BIAS
Pedal by unlocking the trial version,
which procedure is explained next.
To unlock all features of BIAS Pedal -
Modulation Pack and obtain a
permanent license for the app, go to
Positive Grid’s in-app store by
clicking on the shopping-cart icon in
the interface’s upper-right corner and
follow the prompts to purchase it.

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1. ToneCloud - Enters the ToneCloud page.
2. Effects page - Switches among installed software packs. Available software packs include
Distortion Pack, Delay Pack and Modulation Pack.
3. Preset menu -Shows the current preset. Click to open the preset menu.
4. Save button -See the Save Preset section of this manual for more information.
5. Setting Menu -See the Settings section of this manual for more information.
6. Signal Path -See the Signal Path section of this manual for more information.
7. Input volume -Controls the input volume. To prevent feedback, the input volume will be
muted at startup when using a built-in microphone and speaker as the chosen audio
input/output device.
8. Tempo -Shows the current BPM (beats-per-minute) value. You can set the BPM by entering
the desired value or by using the built-in tap tempo feature. The BPM range goes from 40 to
400.
9. Quick Snap -Provides 8 slots to save and instantly recall different parameter setups for
instant comparison of different settings.
10. Noise Gate -See the Noise Gate section of this manual for more information.
11. Amp Room -See the Amp Room section of this manual for more information.
12. Output volume -Controls the output volume.
13. Design button -Customize the look of your pedal. See the Custom Panel section of this
manual for more information.
BIAS PEDAL USER INTERFACE
Desktop Version
1
7 8 9 10 11 12
6
23 4 5
13

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Mobile Version 1. ToneCloud - Enters the ToneCloud page.
2. Effects page - Switches among your installed software packs. Available software packs
include Distortion Pack, Delay Pack and Modulation Pack.
3. Preset menu -Shows the current preset. Press to open the preset menu.
4. Save button -See the Save Preset section of this manual for more information.
5. Setting Menu -See the Settings section of this manual for more information
6. Tooltip -Helpful tips explaining each button and knob.
7. Signal Path -See the Signal Path section of this manual for more information.
8. Input volume -Controls the input volume. To prevent feedback, the input volume will be
muted at startup when using a built-in microphone and speaker as the chosen audio
input/output device
9. Tempo -Shows the current BPM value. You can set the BPM by entering the desired value
or by using the built-in tap tempo feature. The BPM range goes from 40 to 400.
10. Quick Snap -- Provides 8 slots to save and instantly recall different parameter setups for
instant comparison of different settings.
11. Noise Gate -See the Noise Gate section of this manual for more information.
12. Amp Room -See the Amp Room section of this manual for more information.
13. Amp Room -See the Amp Room section of this manual for more information.
14. Output volume -Controls the output volume.
15. Design button -Customize the look of your pedal. See the Custom Panel section of this
manual for more information.
16. Open in BIAS FX -Import current pedal to BIAS FX. Needs BIAS FX mobile.
1 2 3 4 5 6 7
9 10 11 12 13 14
8
15
16

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1. CATEGORY - Shows all the available preset categories. Each category can store several
presets. You can add new categories or delete them. Make sure you don’t delete the entire
category if you want to keep the presets that are inside.
2. EDIT (Category) -Renames, reorders or deletes categories. Click Done when you’re
finished editing.
3. PRESETS -Shows all the pedals in the selected category. Click each pedal to load its
sound. Click twice to check its signal path and to change the parameters for this preset.
4. EDIT (Preset) -Renames, reorders or deletes presets. You can drag presets to other
categories. Click Done when you’re finished editing.
PRESET MENU
・Overwrite - Save the changes made to the parameters for the current preset.
・Save as new -Save current parameters as a new preset and select a category to store it to.
・Share to ToneCloud -Share your preset to ToneCloud.
・Delete Pedal -Delete current pedal.
The save button will light up after any parameter changes, indicating that the changes have not
been saved yet.
SAVE PRESETS
BIAS Pedal lets you store every pedal you build and recall them anytime, anywhere.
On the top menu bar, click the save button next to the preset name to see the save options.
1 2 3 4

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SIGNAL PATH
The signal path shows you how the signal is being processed. Each module in the signal path
provides different functionalities and a different control interface. This section will show you how
to work with these modules and how to get the tone you want.
Custom Panel
The Custom Panel shows how the pedal looks. You can custom-design the look of your pedal
by editing the options listed immediately below.
1. PHOTO
Load a photo from your iPad or computer to
use as the background image for the
pedal. You can alo adjust the image size
and its position on the pedal.
2. RENAME
Name or rename your pedal at any time.
3. BOX
Select the type of box. Different boxes
come with different knob placements and
numbers.
4. COLOR
Select the background color.
5. KNOB
Select the knob design.
Module 1 (Time-based modulation)
Module 1 allows you to design your own time-based modulation effect.
1. Topology
Select the type of effect you want, using the
knob on the far left. The units used for
parameter values, or the actual parameters
themselves, may differ for each control
depending on the type of effect you select, as
explained below.
2. Time Sync Display Panel
When the BPM switch is on, the Time Sync
panel will display the value of the Rate knob
as a time division corresponding to the global
BPM set in BIAS Pedal software. When the
BPM switch is off, the Time Sync panel
displays the value of the Rate knob in Hz
(Hertz, or cycles per second).
3. BPM Sync Switch
This switch alternately sets the Rate knob to
adjust Hz or the time division corresponding
to the global BPM.
4. Intensity
Adjusts the dry/wet mix. When the Intensity
knob is set to its maximum value (all the way to
the right), the signal is 100% wet and you are
only hearing the processed (effect) signal.
5. Tone
Controls a “tilt” filter (bipolar shelving filter).
Turning the Tone control clockwise from its
noon position attenuates low frequencies while
simultaneously boosting highs. Turning the
Tone control anti-clockwise has the opposite
effect, boosting low frequencies while
simultaneously cutting highs.
6. Low Cut
Rolls off low frequencies in the wet signal to
clean out muddiness when needed.

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7. Rate
[Chorus, Vibrato, Flanger, Phaser]
Adjusts the oscillation speed of the LFO.
[Rotary]
Adjusts the rotation speed of the rotary speakers.
8. Depth
[Chorus, Vibrato, Flanger, Phaser]
Adjusts the oscillation depth of the LFO.
[Rotary]
Adjusts the rotation speed of the rotary speakers.
9. Voice
[Chorus, Vibrato]
Adjust the number of voices generated by the effect. More voices results in a
lusher-sounding effect.
[Flanger]
Adjust this control to select among four different types of flanging modes: Voice 1 is “positive
narrow mode,” Voice 2 is “positive wide mode,” Voice 3 is “negative narrow mode,” and
Voice 4 is “negative wide mode.” The positive and negative mode designations indicate
positive or negative feedback is respectively applied with the effect. The narrow and wide
mode designations indicate the different sweeping ranges for the flanger.
[Rotary]
Adjusts the angle between two virtual microphones: voice1 = 0 degrees, voice 2 = 45
degrees, voice 3 = 90 degrees, and voice 4 = 180 degrees.
[Phaser]
Adjusts the number of stages used by the phaser: voice1 = 2 stages, voice2 = 4 stages,
voice3 = 8 stages, and voice4 = 12 stages. The more stages used, the more hollow-sounding
is the resulting effect.
10. Feedback
Adjusts the signal level being fed back into the wet signal chain.
11. Wobble
[Chorus, Vibrato, Flanger, Phaser]
Adjusts the secondary LFO. Turning on Wobble results in some randomness in the Depth setting.
[Rotary]
Adjusts the ratio of the horn speaker and woofer speaker’s relative rotation speeds.
12. Width
[Chorus, Vibrato, Flanger, Phaser]
Adjusts the width of the effect’s stereo image.
[Rotary]
Adjusts the virtual mic’s distance to the woofer speaker (a higher value is equivalent to a closer
mic position).
13. Offset
[Chorus, Vibrato, Flanger, Phaser]
Shifts the center point of modulation.
[Rotary]
Adjusts the crossover frequency for the horn and woofer speakers.
14. LFO
Adjusts the shape of the LFO waveform. Sine (Top left) and Triangle (Bottom left) usually provide
a more subtle and controlled effect, whereas Pulse (Top right) and Rounded Pulse (Bottom right)
add some stutter to the effect.
15. Output
Adjusts the overall output volume.

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6. Rate
[Tremolo, Pan, Auto Swell]
Adjusts the oscillation speed of the LFO.
[RingMod]
Adjusts the oscillation speed that modulates the carrier frequency.
7. Depth
[Tremolo, Pan]
Adjusts the oscillation depth of the LFO.
[RingMod]
Adjusts the oscillation depth that modulates the carrier frequency.
[Auto Swell]
Adjusts the threshold/sensitivity to produce a slow attack.
8. Wobble
[Tremolo, Pan]
Adjusts the secondary LFO. Turning on Wobble results in some randomness in the Depth setting .
[RingMod]
Sets the carrier frequency; this has a very prominent effect on the RingMod sound.
[Auto Swell]
Sets the depth of the secondary LFO, adding tremolo to the slow-attack sound.
Module 2 (Amplitude)
1. Topology
Select the type of effect you want. The units
used for parameter values, or the actual
parameters themselves, may differ for each
control depending on the type of effect you
select, as explained below.
2. Time Sync Display Panel
When the BPM switch is on, the Time Sync
panel will display the value of the Rate knob as
a time division corresponding to the global
BPM set in BIAS Pedal software. When the
BPM switch is off, the Time Sync panel
displays the value of the Rate knob in Hz
(Hertz, or cycles per second).
3. BPM Sync Switch
Sets the Rate knob to adjust Hz or the time
division corresponding to the global BPM.
4. Intensity
Adjusts the dry/wet mix. When the Intensity
knob is set to its maximum value (all the way to
the right), the signal is 100% wet and you are
only hearing the processed (effect) signal.
5. Tone
Controls a “tilt” filter (bipolar shelving filter).
Turning the Tone control clockwise from its
noon position attenuates low frequencies while
simultaneously boosting highs. Turning the
Tone control anti-clockwise has the opposite
effect, boosting low frequencies while simulta-
neously cutting highs.
Module 2 lets you design your own amplitude-based modulation effect.