Cwejman S1 MK2, Руководство пользователя

Страница: 41 / 52

For example, if the pulse with 33% pulse width is modified by the Multi-Mode Filter (Highpass mode,
Q- peak = 7) in series with the Lowpass Filter (Q-peak = 7), the result can be as shown in the illustration
below, with dominant 4th and 5th overtones. The basic tone is heavily suppressed and the modified
pulse signal sounds completely different than the original signal.
O
U
TP
U
T
(V
ol
ts
)
5.0
2.5
0.0
-2.5
-5.0
-7.5
3.00 4.00 5.00 6.00 7.00 8.00
Time (milliseconds)
7.5
dB
V
rm
s
0.0
-10.0
-30.0
-40.0
-50.0
-60.0
-70.0
-80.0
-90.0
1.0k 3.0k 5.0k 7.0k 9.0k 11.0k 13.0k 15.0k 17.0k 19.0k
Frequency (Hz)
440.00 Hz
OSCILLATOR OUTPUT, FILTERED PULSE(33%), A440
-20.0
Tr Pulse Waveform
This is a waveform created by combining a triangle waveform and pulse waveform in the ratio 3 to 1.
Even the waveform has a unique character; the flute-pipe sound of the triangle wave combines with
the overtone-rich pulse wave. See the illustration below.
0.0
-10.0
-20.0
-30.0
-40.0
-50.0
-60.0
-70.0
-80.0
-90.0
1.0k 3.0k 5.0k 7.0k 9.0k 11.0k 13.0k 15.0k 17.0k 19.0k
Frequency (Hz)
440.00 Hz
OSCILLATOR OUTPUT, TPULSE(50%), A440
O
U
TP
U
T
(V
ol
ts
)
5.0
2.5
0.0
-2.5
-5.0
-7.5
3.00 4.00 5.00 6.00 7.00 8.00
Time (milliseconds)
7.5
dB
V
rm
s
Sync, Frequency and Amplitude Modulation
.
The oscillators can be synchronized (except for oscillator1) and also frequency and amplitude
modulated by each other so that the basic waveforms (sine, triangle, sawtooth, pulse) can be modified
in a multitude of ways. This is a very useful method in the creation of many fundamental waveforms
with completely different character for further modification. Some examples are shown in the
illustration below.
3.00 4.00 5.00 6.00 7.00 8.00
Time (milliseconds)
O
U
TP
U
T
(V
ol
ts
)
5.0
2.5
0.0
-2.5
-5.0
-7.5
3.00 4.00 5.00 6.00 7.00 8.00
Time (milliseconds)
7.5
OSCILLATOR2 PULSE out, FM(OSC1/SIN)
OSCILLATOR2 SINUS out, FM(OSC1/SIN)+SYNC
O
U
TP
U
T
(V
ol
ts
)
5.0
2.5
0.0
-2.5
-5.0
-7.5
7.5
37