Elektron Analog Four MKII, Руководство пользователя

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14. MORE ON OSCILLATORS, FILTERS, AND ENVELOPES
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To get a C minor chord (C, Eb, G), set the oscillator TUN parameter to +7 semitones (for
the G), set the sub oscillator to 5TH (for the C), and set the other oscillator to +3 semi-
tones (for the minor third, Eb). To get a C major chord, set the other oscillator to +4 in-
stead (for the major third, E). Suspended chords are created by setting TUN of the other
oscillator to +5 (the perfect fourth, F) for a Csus4 chord, or to +2 (the major second, D)
for a Csus2 chord. Moreover, four-note chords like the major 7th chord (maj7) and minor
7th chord (m7) are possible by using both oscillators’ sub oscillators in 5TH modes, as
these chords consist of two perfect fifths. With oscillator coarse tune settings of +7 and
+11 semitones (G and B, respectively) the sub oscillators will be placed at C and E notes,
forming a C major 7th (Cmaj7) chord. Tuning the oscillators to +7 and +10 semitones
instead (G and Bb) the sub oscillators end up at C and Eb, forming a C minor 7th (Cm7)
chord. The desired chord can be heard when the keyboard or the sequencer plays a C
note. When playing other notes, the chord will transpose accordingly, enabling simple
chord progressions. Transitions between the minor and major variants can be done on
step basis in the sequencer by parameter locking the TUN parameter of the other oscil-
lator to +3 or +4 where desired.
OFF
This turns off the sub oscillator completely. Note that it is otherwise on, regardless of the regular
oscillator waveform setting. The oscillator’s LEV setting then determines the level of the oscillator and
sub oscillator combined.
14.1.2 OTHER OSCILLATOR WAVEFORM SELECTIONS
IN L Uses the audio coming from the left external input as the audio source instead of the oscillator
waveforms. The incoming audio can then be affected by the AM, the filters, the overdrive and the
amplitude envelope of the track.
IN R Equivalent to IN L , but using the right external input.
FDB This setting is only available to OSCILLATOR 1. Instead of using the oscillator waveform as the
audio source, the audio coming from the ladder filter output will be used. Just as with the oscillator,
the LEV parameter sets the level of this signal path. Turning it up high can introduce a self-oscillating
feedback useful for drums or uncontrolled screams. The filter cutoff and resonance settings also
affect the feedback behavior. On more moderate levels, it will give a more overloaded sound character
to whatever enters the filter from OSC2, similar to the external feedback patch known from certain
1970s synths.
NEI This setting is only available in the OSCILLATOR 2 menu. It will route the audio of the multimode
filter output of the track preceding the track being edited. This audio can then be affected by the AM,
the filters, the overdrive and the amplitude envelope of the track. In this way track 1 can be sent to
track 2, track 2 to track 3, track 3 to track 4. For a completely serial routing, turn down the LVL setting
of the routed track completely. This setting does nothing on track 1.
OFF This will turn off the oscillator entirely. The sub oscillator is not affected though.
The AM functionality between the oscillators still exists when using filter feedback, neighbor,
and external inputs as the OSC1/OSC2 waveforms. I.e., other signals than oscillator signals
can be subject to amplitude modulation.
14.2 FILTERS
14.2.1 4-POLE LADDER FILTER
There is no way to turn the ladder filter completely off, but turning up the cutoff frequency will pass
all frequencies through. It should be noted that zero resonance does not give the flattest frequency
response – instead, it drops some decibels both in the treble and in the bass. The flattest response is
reached when resonance is somewhere around 25, which is also the default value.
14.2.2 2-POLE MULTI MODE FILTER
There is no way to turn the multimode filter completely off, but if no filtering is desired there are a number
of good ways to let all audio pass through unaffected by the filter:
• HP2 at min frequency, no resonance.
• BS at min frequency, no resonance.
• LP2 at max frequency, no resonance.
• PK at max frequency, no resonance.
• PK at min frequency, no resonance. Note: this gives an inverted signal.