Elektron Analog Four - Manual (Page 68)

MORE ON OSCILLATORS, FILTERS AND ENVELOPES
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5TH This option adds a 33% pulse waveform one perfect fifth, which is equivalent to seven semitones, below
the oscillator. The sub oscillator thus operates at 2/3 of the oscillator frequency. If, for instance, the oscillator
plays a G, then the sub oscillator will play the C below it. Together with the other oscillator, this makes it possible
to play a simple chord using just one track of the Analog Four.
• 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 semitones (for the minor
third, Eb). To get a C major chord, set the other oscillator to +4 instead (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) is possible by using both oscillators' sub
oscillators in 5TH modes, as these chords consists 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 semi-
tones 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 oscillator 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 com-
bined.
OTHER OSCILLATOR WAVEFORM SELECTIONS
IN L Will use 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 mod-
erate 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 out-
put of the track preceding the track being edited. This audio can then be affected by the AM, the filters, the over-
drive 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 set-
ting does nothing on track 1.
OFF This will turn off the oscillator completely. 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.