Akai S1000 Series Manuel de l'opérateur télécharger pdf (Page 63)

Sampler functions

"env-2 >pitch" allows the pitch of the samples in this keygroup to be altered

according to the values of the second ADSR envelope (+50 to -50). A positive value will

make the pitch rise with the attack, fall with the decay, etc, and a negative value will do

the reverse.

ENV-1

Pressing the

ENV-1 button will bring up this page. Here you can set various parameters

relating to volume. The first line allows you to pick the keygroup, ALL/ONE and the

program to be edited.

The next parameters above the graphic representation of the envelope shape allow you to

alter the attack rate, delay rate, sustain level and release rate of this envelope. As you

change the values, the shape of the envelope will change correspondingly. As the legend

in the top left of this page shows, this envelope controls the volume of the samples in

this keygroup.

Once the basic envelope has been set up, other factors can be used to affect the speed of

the envelope. These are all on the right of the graphic envelope. The first,

"vel.> Att", is

variable from +50 to -50, and determines the amount by which the attack speed will be

changed depending on the Note On velocity. A positive value will increase the attack

time if the key is pressed fast, while a negative value will slow down the attack rate if the

key is pressed fast. This parameter is useful for imitating the characteristics of some

acoustic instruments (for instance, most wind instruments have a faster attack rate when

played loudly).

The next parameter,

"vel. > Rel" is used to vary the release rate relative to the Note

On velocity value (+50 to -50). Again, a positive value will increase the release rate

relative to the Note On velocity, and a negative value will shorten the release time.

However, the parameter below this, "off vel.> Rel" (+50 to -50) is possibly

more relevant to natural-sounding playing. The MIDI specification allows for Note Off

velocity as well as Note On velocity. Though many keyboards do not accept or transmit

this, assuming a mean value of 64, all AKAI keyboards provide a full implementation of

this function. The speed with which the key is released

can be used here to affect the

release rate (positive values mean that a fast release lengthens the release rate, and vice

versa). This allows more expressiveness and realism, but demands a slight relearning of

keyboard technique (similar to an acoustic piano).

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Akai S1000 Series Manuel de l'opérateur Page 63