HT812D0
As stated on the table, KEY1 can be made up
of sub-groups. The corresponding sub-groups
is played in sequence each time KEY1 is trig-
gered.
♦ The playing sequence of sequential KEY1 is:
Group 1-1 → Group 1-2 → Group 1-3 ..... →
Group 1-N (the last group) → Group 1-1 .....
♦ The playing sequence of random KEY1 is:
Group 1-3 → Group 1-5 ..... → Group 1-N →
Group 1-3 → Group 1-5 .....
That KEY1 functions as a random key is a
special case of sequential key, which combines
a particular arrangement of sub-group play-
ing sequence.
♦ Reset of KEY1 playing sequence
If a sub-group of KEY1 group is being played
and one of the keys from KEY2~KEY4 is
triggered, the playing sub-group will be ter-
minated, and the newly triggered key group
is played instead. The first sub-group will
start playing by retriggering KEY1. In other
words, the KEY1 playing sequence is reset
whenever a key other than KEY1 is trig-
gered (see Figure 1).
♦ Sub-group selection
When KEY1 is triggered with pulses, the de-
sired sub-group can be selected by controlling
its corresponding pulse number.
The features of KEY1 have to be set in the
following ways:
– sequential or random
– retriggerable
– minimum key debounce time
(≅700µs, fOSC=96kHz)
For instance, if sub-group 1-3 is the previous
playing group, sub-group 1-5 will start playing
after 2 pulses are applied to KEY1, and so on.
To make easy selection of KEY1 sub-groups,
one of KEY2~KEY4 should be programmed as
silence. Then this silence key has to be trig-
gered to reset KEY1. By so doing, the playing
sub-group of KEY1 is directly specified by the
pulse number applied to KEY1 (see Figure 2).
• KEY4 as a stop key (by mask option)
When KEY4 functions as a stop key, any voice
output can be stopped by pressing KEY4.
• KEY1~KEY3 as a repeat key
KEY1~KEY3 all function as repeat key if one
of the three keys is set as a repeat key. In
other words, once the mode of one of
KEY1~KEY3 is determined, the remaining
two keys are set accordingly.
As a repeat key, the sections included can be
played sequentially and repeatedly till other
trigger is applied. KEY4 functions as a stop
key when KEY1~KEY3 are set as repeat
keys.
Figure 1 Reset of KEY1 playing sequence
Figure 2 KEY1 sub-group selection
6
5th May ’98