GTR-ODR-PLUS

GTR-ODR+ - Guitar Overdrive PLUS!

GTR-ODR+ came about via a request to add some classic guitar amp features to our GTR-ODR overdrive, specifically, switchable boost, spring reverb emulation and tremolo, plus a mono to stereo effects loop. If you’re a fan of classic amp tones, GTR-ODR+ might be the only module you need!

But the real PLUS is that GTR-ODR+ is FREE if you already own GTR-ODR.

GTR-ODR+ is still more overdrive than distortion, but it differs from its small form factor companions by having two gain stages - a soft clipping stage, followed by a hard clipping stage to create a natural, organic and amp-like overdrive and playing response.

The GTR-ODR+ is partly inspired by a classic guitar overdrive pedal very popular with Nashville session players.

Primarily designed for guitar, GTR-ODR+ is a mono in / stereo out processor.

Signal path:

Gate / Buzz Kill -> Boost -> Reverb -> Trem -> Drive / EQ -> Cab -> FX Loop => Room => Out

Note = denotes stereo.

Operation is very simple:

DRIVE sets the amount of overdrive, from semi-clean to full-on crunch depending on the strength of your guitar pickups.

EQ is an active “tilt” type EQ / tone control. Set it the the right to boost highs and cut lows, or set it to the left to cut highs and boost lows. The centre position is a flat response.

You can also bypass the DRIVE and EQ with the ON button above the controls, allowing the module to be used as a simple cab sim and / or reverb effect.

The CAB section contains a switchable guitar speaker cabinet emulation. SIZE varies the frequency response curve corresponding to speaker size, with smaller speakers generally have more highs and less lows.

The ROOM section can be used to add some stereo ambience for added realism when recording or playing direct with GTR-ODR+. At higher SIZE settings, the reverb gets into large hall territory. Use the TONE control to dial-in a warm or bright room to taste. The MIX control sets the balance between the dry and wet signal up to 100% wet. The reverb effect can also be toggled in and out with the ON button, and a variable amount of modulation can added via the MOD knob.

Finally, we have a noise reduction section comprising a simple “set it / forget it” noise gate and our “buzz kill” mains hum reduction system.

Turn GATE on to engage the noise gate - button LED will light green, and the larger LED will light green when the gate is open. When the GATE is off, the button LED will light red, and the gate will effectively be open all the time.

The BUZZ KILL section only really applies to the mains hum associated with single coil pickups. Set it to 50Hz or 60Hz depending on where you are in the World. The centre position bypasses the BUZZ KILL processing and is the best setting for humbucker or noiseless guitar pickups.

BOOST provides an additional gain boost up to +12dB which occurs pre-drive, allowing it to be set for clean / crunch or crunch / lead type tones.

REVERB adds a variable amount of emulated spring reverb.

TREM is a classic sine-like tremolo effect with variable speed and depth. As with vintage amp designs, the tremolo section occurs after the REVERB.

BOOST, REVERB and TREM are all CV switchable via the adjacent jack inputs via a +1.0V or more trigger.

The FX LOOP takes the mono signal after the REVERB and TREMOLO and sends it to the SND jack. The RTN L/R jack signals are then processed in stereo by the ROOM section. For mono effects, use the L(M) RTN jack.

We hope you find GTR-ODR+ useful for your next recording session or gig!