Oberheim Two Voice Скачать руководство пользователя страница 3

 

2

The MINI-SEQUENCER is described separately on a following page. 
So are the VOICE MODULES; the controls of each module are iden-
tical to those of the other, the only difference between them 
being in the way they are controlled by the keyboard and 
sequencer modules.

The OUTPUT MIXER consists of only three rotary pots and two 
phone jacks. The Jack connections are shown in the diagram, and 
the pots are:

6: the OUTPUT LEVEL CONTROL for voice module one,

7: the OUTPUT LEVEL CONTROL for voice module two, and

8: the MASTER OUTPUT CONTROL for the synthesizer.

SETTING THE STAGE

Before connecting your Oberheim synthesizer to headphones or to 
an amplifier, be sure that the master output control is fully 

 

off 

 

(counterclockwise).

After making the external connection to headphones or ampli-
fier, you may turn the synthesizer on. Locate the ASSIGNMENTS 
switches in the minisequencer section, and be sure that they 
are all 

 

down

 

.

In each voice module, set the controls to the positions shown 
on the following page by the asterisks; where there is no 
asterisk use the position in the photograph itself.

You may now turn, if you want to, directly to the section 
called "FIRST STEPS" and begin to explore the synthesizer. But 
it would probably be better to spend just a few minutes reading 
through the descriptions of the minisequencer and the voice 
modules first.

On the other hand, it would be a mistake to try to memorize in 
detail everything in the descriptions following; they contain 
some important facts--usually in italics--and some less impor-
tant but still useful information. Some of this will become 
familiar to you simply from habit as you work with the synthe-
sizer.

Содержание Two Voice

Страница 1: ...A BRIEF INSTRUCTION MANUAL for the OBERHEIM TWO VOICE SYNTHESIZER prepared by james michmerhuizen director the boston school of electronic music...

Страница 2: ...is on voice module two will not be gated until a second key is depressed 3 The PORTAMENTO control normally left fully counterclock wise introduces a lengthening pitch slide between different notes on...

Страница 3: ...king the external connection to headphones or ampli fier you may turn the synthesizer on Locate the ASSIGNMENTS switches in the minisequencer section and be sure that they are all down In each voice m...

Страница 4: ...scription following applies to the three switch version The first switch on the left selects the source of control voltages and gates for VOICE MODULE ONE In its lowest posi tion voice module one will...

Страница 5: ...nt of LAG low frequency filtering applied to the sample hold voltage Turning the lag control to the right produces in other words the same effect on pitches being governed by the sample hold that the...

Страница 6: ...he three position switch selects one of three control signals indicated on the panel to be routed through the rotary pot just above the switch If this knob is rotated to the right the selected control...

Страница 7: ...ter begins to have some effect on a signal passing through it is called the cutoff frequency of the filter The large single knob labelled RESONANCE determines the filter resonance at its cutoff freque...

Страница 8: ...ctly to the output of the NOISE GENERATOR that is part of the sample hold in the minisequencer Noise filtered in various ways is used in the production of wind thunder and motor sounds as well as many...

Страница 9: ...e NOTE above In order to simplify the operation of the voice module while learning or whenever it is necessary to hear continuous sound this VCA BYPASS SWITCH can be moved to the on right position Thi...

Страница 10: ...nual pulse width controls of each oscillator note that these have no effect on the sawtooth oscillator outputs and finally with the VCF manual controls for frequency resonance and pass mode Do not at...

Страница 11: ...by voltage control you are changing the range or area of particular frequencies that are emphasized Try using maximum resonance with a lowpitched sawtooth input open only a little about 10 o clock an...

Страница 12: ...s the filter frequency down as it is rotated to the right the ENV 2 signal drives the filter frequency up d as the filter resonance is increased its output level will generally increase Compensate by...

Страница 13: ...nd sustain and fairly short decay Now slight changes in the filter frequency control in the range 12 o clock to 3 O clock will produce a wide range of percussive noises In a later section you will lea...

Страница 14: ...dinary and conservative results however will come from playing con tinuous legato on the lower voice and a slight nonlegato on the upper voice E TROUBLESHOOTING I Using only the controls we have intro...

Страница 15: ...t s how we started you off the VCA BYPASS switch on and the filter open If either of these conditions does not hold then no continuous sound is possible except that with certain envelope settings unde...

Страница 16: ...o change the pitch of the oscillator The on off switch for the minisequencer CLOCK has also a lower position labelled step This position is spring loaded and the svitcb will not stay there but every t...

Страница 17: ...nspositions will occur with the depression of only a single key if one key is held down while another is depressed to the right of it the sequence will transpose to the higher key only for as long as...

Страница 18: ...trol of the s h begin with the two knobs in the s h section rotated maximum counterclockvise and slowly increase the range setting The first voice produces a series of random pitches over a wider and...

Страница 19: ...all four to check 4 The beat frequency will always double as you go up by octaves So after you have tuned at 8 go up to 4 and then 2 to check on the tuning of each oscillator read just if necessary If...

Страница 20: ...fective range 3 As you increase the filter resonance beyond about the eleven o clock position begin to decrease the audio input levels to the filter until at maximum resonance the audio input level s...

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