Chase Bliss Audio have now tackled the prototypical modulation effect with the Gravitas Analog Tremolo. All the familiar Chase Bliss Audio control flair is here: ModuShape, 6 surface knobs, 3 parameter flip-switches, 1 preset flip-switch, 2 foot-switches, and 16(!) dip-switches mounted to the top side of the pedal. Before we delve into what all this does, it should be obvious that this pedal offers quite a bit more functionality than your old in-amp tremolo. To those of you suffering from knob-o-phobia, a plethora of classic and cutting edge tremolo sounds are available from the Gravitas even if you just stick to using a few of its surface controls. But more on all that in a moment. Here’s a full feature rundown before we dive into our Chase Bliss Audio Gravitas review to see if it’s the best analog tremolo pedal around.nventing analog chorus, vibrato, and phaser effects with the Warped Vinyl and Wombtone (and newly released Warped Vinyl MKII & Wombton
All-analog signal path. Ramp control knob can be set to control any of the 5 parameters (Volume, Tone, Rate, Depth, Sway) individually or simultaneously via dip switches on the back of the pedal. Controls the ramp time in which this takes place. Drive (Ramp) control knob controls the input gain of avery clean, beautiful, and transparent boost when no Ramp dip-switches are in use. Volume control knob sets the output level of the effect. This is a little different than the other Chase Bliss Audio pedal volume knobs. It should be pretty much dimed, with the level set with the Drive control. The main purpose of having this knob is so that you can set up a second tremolo (via Ramping), and then adjust the depth of it. Tone control knob is a wide ranging tone shaping tool. When set to noon, the pedal is transparent. Clockwise for a brighter sound and counterclockwise for a smoother, mellow, dark sound. This circuit is also the basis for the harmonic tremolo as that effect is achieved by modulating between high and low pass filters. Rate control knob controls the rate of the tremolo effect – can get super fast. Can be overridden by the tap tempo switch. 1 – 2 – 4 (3 – 6 – 8/S – B – H) toggle switch sets the tap division for tap tempo. A dip switch on the back accesses the “3 – 6 – 8” divisions. Another dip-switch allows this switch to select between Standard, Both, and Harmonic tremolo modes. ModuShape: Depth control knob sets the depth of the tremolo effect. Crank if for modulation going all the way to silence. Sway control knob sets the center point of the modulation. Set it counterclockwise to make the wave ramp up quickly and down gradually. Set it clockwise to make the wave ramp up gradually and down quickly. Set it at noon for a perfectly symmetrical wave. Left Wave Shape toggle switch sets the first half of the wave modulation. Left for sine, middle for triangle, right for square. Right Wave Shape toggle switch sets the second half of the wave modulation. Left for square, middle for triangle, right for sine. Bypass foot-switch activates or bypasses the effect via true relay bypass. Can by changed to a momentary bypass via a dip switch in the back of the pedal. Tap Tempo foot-switch sets the tap tempo and always honors the last two stomps. Preset toggle switch recalls presets. Middle position reflects current knob positions, right position recalls right preset, and left position recalls left preset. Exp/CV input jack allows expression pedal or CV control of parameters selected via dip switches on back of pedal. When no parameters are set to Ramp, it manually controls the Waveform. Tap/MIDI input jack can be used for tap input or output with a regular ¼” instrument cable. It may also be used to interface with the pedal via an Empress Effects Midibox. Powered by 9-volt battery or 9VDC power adapter. Can also be run at 18-volts for more headroom and output. Chase-Bliss-Audio-Gravitas-Review-Best-Analog-Tremolo-Pedal-03Dip Switches: Volume, Tone, Rate, Depth, and Sway dip switches on the left side simply turn that parameter on or off for ramping or expression pedal capability. Volume, Tone, Rate, Depth, and Sway dip switches on the right side control whether the parameters rise or fall in ramp mode. This also affects the direction of movement with an expression pedal. Bounce dip switch makes parameters go back and forth (i.e. modulate) or ramp and hold. Mode dip switch allows left flip-switch to select tap divisions or tremolo mode. MoToByp dip switch activates momentary bypass, activating pedal only when Bypass foot-switch is pressed in. Tap Control dip switch allows tap tempo to modulate Ramp rate (r) or tremolo Rate (p). Bounce needs to be on to modulate Ramp speed. Tap Division dip switch selects from “1, 2, 4” tap divisions (1) or “3, 6, 8” tap divisions (3). Sweep dip switch selects where Ramp sweeps. In “t” (top) the ramping (or expression control) will occur between the current Ramp knob position and the max position (fully clockwise). In “b” (bottom) the range is set between the current knob position and the minimum position (fully counterclockwise).