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RE4: Amplitude Decay Track
Displayed as: AmpDecTk
Initial value: 0
Range of adjustment: -64 to +63
This parameter works in exactly the same way as Attack Track, except that it is the Decay
time of a note that becomes dependent on its position on the keyboard.
RE5: Amplitude Sustain Rate
Displayed as: AmpSusRt
Initial value: Flat
Range of adjustment: -64 to Flat to +63
With this parameter set to Flat, the volume during the Sustain phase of the envelope re-
mains constant. Additional variations to a note’s character can be obtained by causing the
note to become louder or quieter while the key is held. A positive value of Sustain Rate
will cause the volume to increase during the Sustain phase, and it will continue to do so
until maximum level is reached. The parameter controls the rate at which the note increases
volume, and the higher the value, the faster the rate of increase. Any Release time set will
act as normal when the key is released, whether or not the maximum volume has been
reached. If a negative value is set, the volume during the Sustain phase drops, and if the
key is not released, the note will eventually become inaudible.
Lower values (positive or negative) of Amplitude Sustain Rate are generally
more useful.
RE6: Amplitude Sustain Time
Displayed as: AmpSusTm
Initial value: 127
Range of adjustment: 0 to 126, KeyOff
This parameter sets the duration of the Sustain phase. With a value of KeyOff, the note will
remain audible continuously until the key is released (unless a negative value of Sustain
Rate has been applied to reduce its volume). Any other value of Sustain Time will cut
the note off automatically after a pre-determined time if the key is still held down. Release
Time still applies if the key is released sooner. A value of 126 sets the Sustain time to ap-
prox. 10 seconds, while values around 60 set it to about 1 second.
RE7: Amplitude Level Track
Displayed as: AmpLvlTk
Initial value: 0
Range of adjustment: -64 to +63
This parameter works in a similar way to the other “tracking” parameters Attack Track and
Decay Track (RE3 & RE4), but it is the volume of the note which is changed, according to
the interval between it and the Track Note set by RE8. With a positive value, notes higher
than the Track Note get progressively louder the further from the Track Note they are, and
vice-versa. With a negative value, notes higher than the Track Note get progressively qui-
eter the further from the Track Note they are, and again, vice-versa. Note that this volume
modification is applied to all phases of the amplitude envelope equally; it is the overall
volume of the note which changes with Level Track. The effect should be used sparingly;
low values have a better effect.
Note that although Amplitude Level Track appears to operate in a very similar
manner to Amplitude Attack Track and Amplitude Decay Track, only Level Track
uses a user-definable note as the reference (set by RE8), above which notes
get louder and below which get softer. The Attack and Decay Track parameters (RE3 and
RE4) have a fixed reference note at C 3.
Common Envelope Parameter
This parameter is available on Page 2 of the menu for every Envelope.
RE8: Level Track Reference Note
Displayed as: LvlTkNte
Initial value: C 3
Range of adjustment: C -2 to G 8
This sets the reference note used for Amplitude Level Track. When active, this parameter
increases the volume for notes above the chosen Track Note, and reduces it for notes
below it. C 3, the default value, is Middle C on the keyboard; this is the C one octave above
the lowest note on the keyboard (also C), providing no OCTAVE buttons [32] are selected.
Envelope 2 (Filter) parameters (Page 1)
The parameters available for adjustment with Envelope generator 2 closely match those for
Envelope generator 1. Whereas Envelope 1 is concerned with modifications to the sound’s
amplitude envelope, Envelope 2 gives you “dynamic” filtering, by establishing a relationship
between the filter section and ADSR Filter Envelope 2, resulting in the filter frequency be-
ing varied by the shape of the envelope.
In order to hear the effect of any of the Filter Envelope parameters, you will first
need to go to the Filter Menus and set up some filtering. Then set RE5 on Filter
Menu Page 1 (F1Env2 or F2Env2) to an initial value of approx. +30 and ensure
that the filter is not fully open – i.e., set F1Freq to mid-range.
RE1: Filter Attack Time
Displayed as: FltAtt
Initial value: 2
Range of adjustment: 0 to 127
This parameter sets how the filter section acts during the note’s Attack phase. The higher
the value, the longer it takes for the filter to react during this phase.
To evaluate the action of the Filter Envelope parameters for each of the ADSR
phases (RE1 to RE4), it may be helpful not to set all three to zero.
RE2: Filter Decay Time
Displayed as: FltDec
Initial value: 75
Range of adjustment: 0 to 127
This parameter sets how the filter section acts during the note’s Decay phase. Again, the
higher the parameter value, the longer the period for which filtering is applied .
RE3: Filter Sustain Level
Displayed as: FltSus
Initial value: 35
Range of adjustment: 0 to 127
The frequency of the filter (cut-off or centre, depending on filter type) “settles” at a value
set by the Filter Sustain Level. Thus, once the Attack and Decay stages of the envelope
are completed, the harmonic content that will be most evident in the sound will be deter-
mined by this parameter. Remember that if the filter frequency parameter (as set in the Filter
Menu) is set at a too low or too high a value, the envelope’s effect will be limited.
RE4: Filter Release Time
Displayed as: FltRel
Initial value: 45
Range of adjustment: 0 to 127
As Filter Release is increased in value, the note undergoes increasingly more filter action
once the key is released.
Note that the Amplitude Release time (in Envelope 1’s parameters) must be set
sufficiently high to produce an audible “fade-out” before the effect of filtering on
the “tail” of the note is evident.
ATTACK DECAY
RELEASE
SUSTAIN
SUSTAIN
RATE
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