Magma EOwave Instruções de Operação descarregar pdf (Página 19)

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5. SOUND GENERATION 5. SOUND GENERATION

5.2. Oscillator (VCO) / Mixer

The VCO is MAGMA´s main signal source. It provides the basic waveforms to the module next in line, the

mixer. The VCO section is endowed with a sub oscillator which derives its output from the VCO´s square-

wave. A closer look at all the controls will explain the functions of both VCO and mixer.

5.2.1. Mixer

The mixer is the output stage of MAGMA´s oscillator. All

signals provided by the VCO are summed together into one

audio-signal.

: Level of SAW wave signal.

: Level of SQUARE wave signal.

: Level of SUB oscillator signal.

: Level of the NOISE signal.

Cranking up all four signals fully will cause saturation and

distortion. This can be very useful to fatten up MAGMA´s

sound. If you want a clean sound, we recommend you kee-

ping the level knobs below the 3 o‘clock setting.

All four signal levels can be individually modulated by

LFO 2.

Hit SHIFT and keep it depressed while moving one of the

WAVEFORMknobsasthiswillapplyaspecicmodulation

depth to the selected waveform level.

5.2.1. VCO

TUNE:

Global tune. Tunes the VCO and the sub-oscillator within the range of one semitone.

The tune setting will not be stored as part of a preset.

OCTAVE:

Controls the octave setting of both the VCO and the sub oscillator.

The three LEDs around the octave button display the octave setting of

the VCO.

The LED in the central button displays the octave setting of the sub-

oscillator, depending on the setting of the VCO.

Hit the button eight times to cycle through all possible settings.

PW:

Controls the PULSE-WIDTH of the square-wave manually from 50% to 95%.

When the pulse-width of the square-wave is modulated (see below), this knob controls the modulation

depth applied by LFO 1 or envelope 2.

SYNC / PWM:

This button has two related functions. Firstly, it synchronises the

sub-oscillator to the VCO which will result in interesting timbres when

changing the pitch of the VCO.

Secondly, it selects the modulation source for the pulse-width modu-

lation (PWM) of the square-wave.

The three LEDs around the sync button display the PWM source. The

LED in the button displays the state of the oscillator-sync function.

Hit the button six times to cycle through all possible settings.

GLIDE:

Adjusts the glide time when the glide function is active. Please refer to section 4.6.3. on page 29 how to

enable / disable the glide function.

LFO:

Adjusts the modulation depth of LFO 1, modulating VCO pitch.

5.3. Filter (VCF)

MAGMA´slterisaclassic24dB/four-polelow-passdesignwithresonanceandgreatsonicpotential.

Let‘s have a closer look at it:

CUTOFF:

Adjusts the cut-off frequency. When turned fully counter-clockwise, there

might be no signal audible (no-pass, so to speak…).

RESO:

Adjuststheresonanceintensityofthelter.Highersettingswillcausethe

ltertoself-oscillatewhichresultsinfeedback.Pleasehandlethereso-

nancepot(hereitisagain!)withcare–feedbackmightreachexcessive

levels, depending on the cut-off frequency setting. Do not blow your twee-

ters or your ear-drums!

Thelowerthreeknobsareusedtomodulatetheltercut-offfrequency:

LFO:

Adjusts the modulation depth of LFO 1 modulating the VCF cut-off frequen-

cy.

ENV:

Adjusts the modulation depth of envelope 2 modulating the VCF cut-off

frequency.

Pressing SHIFT while moving the ENV knob will yield an inverted modulati-

on curve.

KEYB:

Adjusts the keyboard tracking value of the VCF frequency. Keyboard tra-

cking makes higher notes sound increasingly brighter.

Youcanrunanexternalaudiosignal(e.g.adrummachine)intoMAGMA´slterforprocessingsound.

Connect this signal (line level) to the Input socket on MAGMA´s rear panel. Adjust the input level with the

trimmer found next to the input socket.

Pleasenotethattheexternalsignalhastohavelinelevel.Thesignalisfeddirectlyintothelterinput,thus

itwillonlybeattenuated,notamplied.

Octaves

OFF: SUB-Osc. -1 Octave

ON: SUB-Osc. -2 Octave

OctavesOctave

Manual (PW Knob)

Sync ON / OFF

LFO 1

ENV 2

1 2 ... 14 15 16 17 18 19 20 21 22 23

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