Moog Music MF-103 12-Stage Phaser - Manual (Page 7)

Figure 5 – Frequency Response of a ‘basic’ 6-stage phaser. Figure 6 – Frequency Response of the AUX output.
AUX OUTPUT: Figure 6 shows the frequency response that you get when you start
with the basic setup, and then listen to the AUX Output rather than the Main
AUDIO Output. Note that the frequency response is the opposite of Figure 5.
That is, the peaks of Figure 6 are at the same frequencies as the dips of Figure
5, and vice versa. The sound is similar, except that there is distinctly less sound
energy at very low and very high frequencies. (We’ll say more about the Aux
Output when we talk about using both audio outputs together as a stereo pair.)
Figure 7 – Frequency response of a 12-stage phaser. Figure 8 – Frequency response of a phaser with high
resonance
12-STAGE: Figure 7 shows the frequency response that you get when you start
with the basic setup and then switch the right-hand rocker switch to 12-stage.
The mid-shift frequency has not changed, but now there are six dips, and the
intervals between adjacent dips are half as wide. The quality is distinctly different
from 6-stage.
RESONANCE: Figure 8 shows the frequency response that you get when you start
with the basic setup and then turn the RESONANCE control up to 10. The
positions of the peaks and dips have not changed, but the peaks have
become higher and sharper. This gives the phaser a quality similar to an array of
highly resonant filters.
SWEEP: Figure 9 shows what happens when you start with the basic setup and
then turn the SWEEP control through its range. Technically speaking, the entire
frequency response moves back and forth horizontally. Musically, you hear the
classic phaser “whooshing” sound as different frequency bands of your