Lexicon MPX 550 manual Mix Dry, 1 to 99%, Wet, MstrRate To 100%, Pch Fbk L, R, Pch L, R/S

Parameter Descriptions

Lexicon

Mix (Dry, 1 to 99%, Wet)

Mix controls the ratio of unprocessed (Dry) and processed (Wet) signal in the output. When the MPX 550 is patched into a console, this parameter should almost always be set to Wet.

MstrRate (0 to 100%)

In Rotary programs, serves as a master rate control affecting both the horn and drum rates.

Pch Fbk (L), (R) (-100% to +100%)

Controls the amount of feedback through the Pitch pre- sets, resulting in repeated echoes with pitch progressing up or down.

Pch (L), (R/S) (-2400 to 2600)

Control the amount of pitch-shift applied to the left and right channels. For true stereo programs, the Pch(L) parameter is not available and the Pch(R/S) parameter means stereo. For mono programs, the Pch(L) and (R/S) parameters mean left and right respectively.

Pitch-shifting requires some time shifting. A true stereo (not merely Dual Mono) signal contains components that are common to the left and right signals. A proper stereo image is maintained only if the phase relationship between the left and right signals is maintained. This requires that the exact same computation be applied to both channels, which is why only one control is provid- ed for Pitch presets.

PDly (L), (R) (0 to 100ms)

Controls the amount of "look-ahead" required by the pitch-shift algorithm. Some amount of pre-delay is always in effect, even when this parameter is set to 0.

Phase (0 to 270deg)

Determines the relative timing between the left and right channels.

PreDelay (0ms to 1.198sec)

Controls the time delay between the input of signal and the onset of reverberation.

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