Apple Logic Express 7 - Manual (Page 101)

Chapter 17 ES1 101
Voices
The number displayed is the maximum number of notes which can be played
simultaneously. Each ES1 instance offers a maximum of 16 voice polyphony. Fewer
played voices require less CPU power.
If you set Voices to legato, the ES1 will behave like a monophonic synthesizer with
single trigger and fingered portamento engaged. This means that if you play legato, a
portamento corresponding to the Glide setting will occur, but if you release each key
before you press a new one, there will be no portamento at all. The envelope will not
be triggered by the new note. This allows for pitch bending effects without touching
the pitch bender. Don’t forget to select a higher Glide value when using the Legato
setting.
Chorus
The ES1 offers classic stereo Chorus/Ensemble effects. There are four possible
settings: Off, C1, C2, and Ens.
Off deactivates the Chorus. C1 and C2 are typical Chorus effects. C2 is variation of C1
and is characterized by a stronger modulation. In comparison, the Ensemble effect (Ens)
employs a more complex modulation routing, creating a fuller and richer sound.