Control the Chase Bliss Gravitas from your browser — MIDI control reference, interactive editor, and AI-generated presets. Free, no install.
Explore the Gravitas controls in your browser and connect compatible MIDI hardware to send settings to your pedal. The reference below shows the controls mapped in Nitelite; available functions depend on the pedal and firmware. The default MIDI channel in Nitelite is 4. Browser MIDI control works in Chrome, Edge, Opera, or Brave — no install required.
Knobs
Control
MIDI CC
Description
DRIVE
CC 14
Clean boost gain. When ramping dips engaged, controls ramp time instead.
VOLUME
CC 15
Output level. Best at max with level set via Drive. Can be ramped for secondary trem.
TONE
CC 16
Tone control. Noon=transparent, CW=brighter, CCW=darker. Sets harmonic trem top end.
RATE
CC 17
Tremolo rate. Can get very fast. Tap tempo overrides this.
DEPTH
CC 18
Tremolo depth. Max goes to silence. Harmonic mode: controls darkness of modulation.
SWAY
CC 19
Wave center point. CCW=fast up/slow down, CW=slow up/fast down, noon=symmetric.
Switches
Switch
MIDI CC
Positions
TAP DIV
CC 21
1/2/4 / 3/6/8 / S/B/H
WAVE L
CC 22
SINE / TRI / SQR
WAVE R
CC 23
SQR / TRI / SINE
DIP Switches — RAMP / EXPRESSION
Control
MIDI CC
Description
VOLUME
CC 61
Enable ramping/expression control for VOLUME knob
TONE
CC 62
Enable ramping/expression control for TONE knob
RATE
CC 63
Enable ramping/expression control for RATE knob
DEPTH
CC 64
Enable ramping/expression control for DEPTH knob
SWAY
CC 65
Enable ramping/expression control for SWAY knob
BOUNCE
CC 66
Bounce mode (continuous modulation) vs Ramp (one-shot)
SWEEP
CC 67
Sweep direction: Bottom (B) or Top (T)
TAP DIV
CC 68
Enables 3/6/8 tap divisions instead of 1/2/4
DIP Switches — CUSTOMIZE
Control
MIDI CC
Description
VOLUME
CC 71
Rise/Fall direction for VOLUME
TONE
CC 72
Rise/Fall direction for TONE
RATE
CC 73
Rise/Fall direction for RATE
DEPTH
CC 74
Rise/Fall direction for DEPTH
SWAY
CC 75
Rise/Fall direction for SWAY
MODE
CC 76
Transforms toggle to S/B/H: Standard, Both, Harmonic tremolo
MOTOBYP
CC 77
Momentary-to-bypass: pedal only on while footswitch held
TAP CTRL
CC 78
Tap controls: R=Ramp speed, P=Rate (RPM). P taps set rate, R taps set ramp speed.
Footswitches
TAP — CC 93
BYPASS — CC 102
Special MIDI Functions
Tap Tempo — CC 93
Expression — CC 100
MIDI Clock Sync — CC 51. When enabled, the Gravitas listens for and syncs tempo to incoming MIDI Clock messages. When disabled, MIDI Clock messages are ignored and tempo is set manually.
Hardware Presets
Gravitas has 122 hardware preset slots, recalled using MIDI Program Change. Saving requires an action on the pedal; follow the hardware preset manager instructions.