Doepfer A-111-1 High End VCO - Manual (Page 10)

A-111 VCO 2 System A - 100 doepfer
10
Soft Sync
In contrast with hard sync, soft sync produces no
change in the waveform of the slave VCO. The
master VCO simply forces the slave’s waveform direc-
tion changes to match its own.
That simply means that the slave VCO's frequency
f
S
is increased, to become an exact multiple of the
master VCO’s.
In fig. 14 you can see that the frequency of the
‘synced’ triangle wave f
R
is forced into being exactly
double that of the master VCO f
M
(or, to put it another
way: cycle T
M
is twice the length of cycle T
R
).
Soft Sync, because there is no change in the slave’s
actual waveform shape, can’t produce timbral variati-
ons. What it does instead is to lock two or preferably
more oscillators into a perfect harmonic relation,
to produce a particular sort of timbre.
Fig. 14: Soft sync on the A-111
T
M
T
R
T
S
0V
0V
0V
Slave-Signal
Master-Signal
Soft-Sync-Signal