4–3: Amp1 EG
These parameters let you create time-varying changes in the
volume of oscillator 1.
4–3a: EG Reset
This selects an AMS source to reset the EG to the start point.
For instance, you can use a tempo-synced LFO to trigger the
EG in a repeating rhythm. This reset is in addition to the
initial note-on, which always causes the EG to start.
For a list of AMS sources, please see "AMS (Alternate
Modulation Source) List" on page 374.
Note: Once the Amp EG is in its Release segment, it cannot
be reset. (Otherwise, the sound might keep playing forever!)
This sets the AMS level which will trigger the EG reset.
Among other things, you can use this to adjust the exact
point in an LFO's phase at which the EG will be reset,
effectively controlling its "groove" against other rhythmic
effects. When the threshold is positive, the EG triggers when
passing through the threshold moving upwards. When the
threshold is negative, the EG triggers when passing through
the threshold moving downwards.
Note: With some LFO shapes, and with faster LFO speeds,
the LFO may not always reach the extreme values of +99 or
–99. In this case, setting the Threshold to these values may
cause inconsistent behavior, or may mean that the EG
doesn't reset at all. If this happens, reduce the Threshold
until the EG triggers consistently.
These parameters specify how the amp 1 EG will change
Note-on or reset
[List of AMS Sources]
PROG P4: Amp/EQ 4–3: Amp1 EG
This sets the initial volume level at note-on.
This sets the level at the end of the Attack time.
Break, short for Break Point, sets the level at the end of the
This sets the level at the end of the Slope time. Once it
reaches the Sustain level, the EG will stay there until note-off
(unless it is reset via AMS).
Higher values mean longer times, as shown below.
This sets how long the EG takes to move from the Start level
to the Attack level.
For the fastest possible attack time, you can set the Start
level to +99; in this case, the EG will start instantaneously at
its maximum value.
This sets the time it takes to move from the Attack level to
the Break level.
This sets how long the EG takes to move from the Break
level to the Sustain level. Once it reaches the Sustain level,
the EG will stay there until note-off (unless it is reset via
This sets how long it takes the EG to move from the Sustain
level to silence.
For the sake of simplicity, most of the diagrams in this
manual show envelopes as being made out of straight lines.
In actuality, though, envelopes are more likely to be made
out of curves.
In other words, each segment's level will change quickly at
ﬁrst, and then slow down as it approaches the next point.
This tends to sound better than straight, linear segments.
Classic analog synth envelopes made these curved shapes
naturally. The M50 goes a step further than vintage synths,
however, and lets you control the amount of curvature
separately for each of the four envelope segments.
When you change the curvature, the EG times remain the
same. However, greater curvature will tend to sound faster,
because the value changes more quickly at the beginning.