Ableton/Live/UG/29 Audio Effect Reference/14 Echo
- Echo is a modulated delay with two independent delay lines, envelope and filter modulation, and character controls.
- Channel Mode — Stereo, Ping Pong or Mid/Side; Mid/Side replaces the Left and Right knobs with Mid and Side.
- Left / Right — delay times, in beat divisions or ms depending on Sync
- Sync Mode — Notes, Triplet, Dotted or 16th; only heard while Sync is on
- Stereo Link — changes to time, Sync and Sync Mode apply to both sides
- Delay Offset — nudges each line slightly for swing; independent even when linked
- Input — gain on the dry signal; D distorts it
- Feedback — output fed back into the delay lines; Ø inverts the fed-back signal
- The Echo Tunnel draws each repeat as a ring moving toward the center; spacing shows time between repeats, and white dots mark a fixed 1/8 grid. Drag in it to change delay times.
- Filter turns on a high-pass and a low-pass:
- HP and its Res — high-pass cutoff and resonance
- LP and its Res — low-pass cutoff and resonance
- The triangle button shows the Filter Display, where the filter dots can be dragged.
- An LFO modulates filter frequency and delay time, and can be blended with an envelope follower.
- Waves — sine, triangle, saw up, saw down, square, noise; drag the wave in the display to change its rate
- Sync on — Rate in beat divisions; off — Freq in Hz
- Phase — offset between left and right; 180° is fully opposite
- Mod Delay — modulation of delay time; Modulation x4 multiplies it by four, giving deep flanging at short times
- Mod Filter — modulation of the filter
- Env Mix — 0% LFO only, 100% envelope follower only
- Dynamics and imperfections:
- Gate — input gate with Threshold and Release
- Ducking — turns the wet signal down while input is above Threshold; Release sets how fast it recovers
- Noise — adds vintage-style noise; Amount and Morph between noise types
- Wobble — irregular delay-time modulation like a tape delay; Amount and Morph between wobble types
- Repitch — pitch bends when delay time changes; off, the change crossfades
- To save CPU, Echo turns off at least eight seconds after its input goes silent — unless both Noise and Gate are on.
- Reverb — reverb amount; Reverb Location puts it before the delay, after it, or inside the feedback loop; Decay sets its length
- Stereo — width of the wet signal; 0% mono, above 100% wider
- Output — output gain
- Dry/Wet — set to 100% on a return track. Its context menu has Equal-Loudness, which makes a 50/50 mix as loud as either end.