Echo

Choose between three different modes: Stereo, Ping Pong and Mid/Side, and use the Left and Right delay line controls to control the delay time, which can be set in beat divisions or milliseconds. In Mid/Side mode, the Left and Right delay line controls are replaced with Mid and Side knobs.

Use the Sync Mode choosers to select Notes, Triplet, Dotted and 16th sync modes. When switching between Sync Modes, the resulting changes are only audible while the Sync switch is set to Sync. When Stereo Link is engaged, changing either channel’s delay line control, Sync switch or Sync Mode settings will apply the changes to both sides.

Changing the Delay Offset sliders shortens or extends the delay time by fractional amounts, producing the ”swing” type of timing effect found in drum machines. Note that when Stereo Link is enabled, the Delay Offset can still be adjusted individually for the two delay lines.
The Feedback parameter defines how much of each channel’s output signal feeds back into the delay lines’ inputs, while the “Ø“ button inverts each channel’s output signal before adding it back to their inputs.

Echo tab

The Echo tab provides a visualization and control of the delay lines and filter parameters. The Echo Tunnel’s circular lines represent the individual repeats, progressing from the outside of the tunnel to its center. The distance between the lines indicates the time between the repeats, and the white dots in the middle form a fixed 1/8th note grid for reference. You can adjust the delay times for each delay line by clicking and dragging in the display.

The Filter toggle enables a high-pass and low-pass filter. The HP slider adjusts the cutoff frequency of the high-pass filter and the adjacent Res slider adjusts the high-pass filter’s resonance. The LP slider adjusts the cutoff frequency of the low-pass filter, and you can use the Res slider on the right side to adjust the low-pass filter’s resonance.

The Filter Display makes it possible to visualize the filter curves. To show or hide the Filter Display, use the triangular toggle button. You can also adjust the filter parameters by clicking and dragging either of the filter dots in the Filter Display.

Modulation

Echo’s Modulation tab contains an LFO that modulates filter frequency and delay time, and an envelope follower that can be blended with the LFO. Choose from one of six different modulation waveforms including sine, triangle, sawtooth up, sawtooth down, square, and noise.
When Sync is enabled, modulation is synchronized to the song tempo. When Sync is disabled, you can use the Freq slider to adjust frequency of the modulation oscillator in Hertz. Phase adjusts the amount of offset between the waveforms for the left and right channel. At 180°, the channels will be perfectly out of phase.

Mod Delay adjusts the amount of modulation that is applied to the delay time. Modulation x4 scales the delay time modulation depth by a factor of four. With short delay times, this produces deep flanging sounds. Mod Filter adjusts the amount of modulation that is applied to the filter.
Env Mix blends between the modulation oscillator and an envelope follower. At 100%, only the envelope’s modulation will be heard. At 0%, only the LFO’s modulation will be heard.

Character and crunch

Echo’s Character tab contains parameters that control dynamics and add imperfections to your sound.

Gate enables a gate at Echo’s input. It mutes the signal components below its threshold. Threshold sets the threshold level that incoming audio signals must exceed in order to open the gate.

Release sets how long it takes for the gate to close after the signal has dropped below the threshold.

When Ducking is enabled, the wet signal is proportionally reduced as long as there is an input signal. Ducking begins to affect the output signal when the input level exceeds the set Threshold. Release sets how long it takes for ducking to stop after the input signal drops below the threshold.
Noise introduces noise to simulate the character of vintage equipment, while Wobble adds an irregular modulation of the delay time to simulate tape delays.

Repitch causes a pitch variation when changing the delay time, similar to the behavior of hardware delay units. When Repitch is disabled, changing the delay time creates a crossfade between the old and new delay times.

Global controls

The Reverb knob sets the amount of reverb added, and you use the Reverb Location chooser to set where the reverb is added in the processing chain: pre delay, post delay, or within the feedback loop. Use the Decay slider to lengthen or shorten the reverb tail.

The Stereo control sets the stereo width of the wet signal. 0% yields a mono signal whereas values above 100% create a widened stereo panorama.

The Output sets the amount of gain applied to the processed signal. The Dry/Wet control adjusts the balance between the processed and dry signals. Set it to 100 percent when using Echo in a return track. The Dry/Wet parameter’s context menu lets you toggle Equal-Loudness. When enabled, a 50/50 mix will sound equally loud for most signals.