Universal Audio Lion '68 — MIDI Editor & CC Reference

Control the Universal Audio Lion '68 from your browser — full MIDI CC reference for 9 parameters, interactive editor, and AI-generated presets. Free, no install.

Nitelite gives the Lion '68 a full browser-based control surface: turn every knob, flip every switch, describe the tone you want to the AI Tone Terminal, and save the results — all sent to the pedal live over MIDI (default channel 1). Works free in Chrome, Edge, Opera, or Brave — no install required.

Knobs

Control	MIDI CC	Description
VOLUME I	CC 22	Channel I gain. Brighter and more aggressive as you turn it up. Jumped with Volume II by default (Y-cable) for a fuller, more saturated sound. As you increase one or both Volume controls, the amp becomes more saturated and distorted.
VOLUME II	CC 23	Channel II gain. Darker with more bottom end as you turn it up. Jumped with Volume I by default. Turn the unused channel fully down to use one channel independently. Use Volume II to bring in bottom-end girth and balance the high end from Volume I.
OUTPUT	CC 7	Overall post-amp output level. At noon, running direct or into other pedals, level is roughly the same as bypassed volume. Not a control on the original amp.
BASS	CC 31	Low frequency response of the amp's tone stack (AMP mode).
MIDDLE	CC 32	Mid frequency response of the amp's tone stack (AMP mode). Reduce mids for Fender-style scooped tones; increase mids for more lead impact and warmth.
TREBLE	CC 33	High frequency response of the amp's tone stack (AMP mode).

Alt / Secondary Knob Functions

Control	MIDI CC	Description
ROOM	CC 30	Amount of room tone mixed into the signal (ALT mode). Adds studio ambience and air from the tracking-room microphones. Has no effect when the speaker cabinet is bypassed or in 4-cable mode. There is no fully-wet Room sound.
PRESENCE	CC 34	Overall brilliance and gain of the power amp section (ALT mode). Increase Presence to add more available gain and edge to the sound.
BOOST	CC 41	Boost amount (ALT mode). Fully counter-clockwise = no boost. Above minimum engages an EP-III preamp for color and warmth. Towards 10 o'clock adds clean gain that pushes the amp's front end. Past 10 o'clock, a graphic-EQ-style midrange boost curve adds thick character.

Switches

Switch	MIDI CC	Positions
CAB	CC 18	GB25 / GB30 / JBGB / EV12 / D65 / Vee30 / No Cab
MODEL	CC 17	Bass / Lead / Brown
INPUT ROUTING	CC 21	Low / High / Jumped

Footswitches

ON — bypass on CC 12
PRESET — bypass on CC 13

Special MIDI Functions

Boost Enable — CC 40. Toggles the boost circuit on/off independent of the Boost knob position.
Bright Cap — CC 35. Toggles the bright cap on Channel I. Adds brightness at lower gains; effect is reduced as Channel I gain rises and is removed at full gain. On by default on Lead, off by default on Brown. Not available on the Bass amp model.
Ghost Notes — CC 36. Transformer/power-supply-driven harmonic artifacts around certain notes (intermodulation distortion). When ON, adds life and 'scream' higher on the neck (stock amp behavior). When OFF, switches to a cleaner power supply that eliminates ghost notes and much of the transformer hum. Note: CC value is inverted — 0 = Ghost Notes on, 1 = Ghost Notes off.
Noise Gate Enable — CC 70. Toggles the noise gate on/off. Detects at the input but acts at the end of the signal chain, making it very effective on these high-gain amps.
Gate Threshold — CC 71. Level at which the noise gate opens/closes. Adjust until your lightest notes pass through but the noise is suppressed.
Gate Hold — CC 72. How long the gate holds the note after it drops below threshold, before the release time starts. Works with Release to avoid 'note chatter'.
Gate Attack — CC 73. How quickly the gate opens when the signal crosses the threshold.
Gate Release — CC 74. Length of time before the gate closes after the signal drops below threshold. Set for a natural release.
Gate Attenuation — CC 75. Level of attenuation when the gate is closed. Very high settings allow no amp noise through; lower values let some noise pass.
Cab Up — CC 14. Cycles the Cab switch up through the cab list (momentary).
Cab Down — CC 15. Cycles the Cab switch down through the cab list (momentary).
Store Preset (Hold) — CC 16. Emulates holding the ALT/AMP/STORE switch. Sends value 1 to save the current Live-mode settings to the currently selected preset slot.

Hardware Presets

The Lion '68 has 128 hardware preset slots. Nitelite can save your current settings to a slot and recall slots via MIDI program change.