Range; Amp Envelope - Alesis S4 Plus Reference Manual

Chapter 6: Editing Programs
Note (000 to 127/C-2 to G8)
Each drum can be assigned to a single note which will trigger the drum sound when
played. Quad Knob [1] specifies the note assignment of the selected drum (000 to
127/C-2 to G8). You can also set the note assignment by holding Quad Switch [1]
and tapping the key on the keyboard you want to set as the note for the drum.
Only one drum can be assigned to a single note within a single Program sound layer.
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If more than one drum in a single sound is assigned to the same note number, only
the higher number drum will sound.
Range (0 to +3)
Each drum can be assigned a range of notes (up to 3) above the root note which will
trigger the drum sound when played. Quad Knob [2] specifies the note range of the
selected drum (0 to +3). The pitch of the drum will remain the same no matter which
key is played.

Amp Envelope

Decay (0 to 99, Gate00 to Gate99)
Quad Knob [1] in the Amp Envelope (AENV) Function lets you adjust the Decay time
of the selected drum (00 to 99, Gate00 to Gate99). If this is set to 0, only the very
beginning of the drum sample is played; setting this to 99 will cause the entire drum
sample to play. When set above 99, the Decay uses a gated mode. The Decay can
still be set between 0 and 99, but in 5-step increments (e.g., Gate00 = Decay setting
of 0 with gating, Gate05 = Decay setting of 5 with gating, etc.). Gating means that the
drum sound will continue to be played as long as the key is held. This is useful for
longer sounds, like cymbals, when you wish to hear a short crash by playing a short
note but can still hear a longer crash by keeping the note held down.
Mute Group (Off, 1, 2, or 3)
This is an important feature when using multiple sounds of the same instrument. Mute
Groups allow multiple drums to share a single voice. For example, if you have
assigned a Closed Hat and an Open Hat to two different notes, playing either note
should cut-off the other (if it had recently been played). This creates a more realistic
sound, since an actual Hi Hat is only capable of making one sound at a time.
In the Amp Envelope function, Quad Knob [2] is used to assign the selected drum to
one of the three Mute Groups. In our example above, both Hi Hat drums would be
assigned to the same Mute Group. The additional Mute Groups can be used by other
sounds that you wish to cut-off each other, but do not want to interfere with the Hi Hat
sounds. Use Quad Knob [4] to select the drum (1—10) you wish to edit.
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