Oberheim Matrix-12 User Manual

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FREQ
"Frequency" This parameter determines the pitch of the
VCOs. Range is 0 to 63 (five Octaves and a Minor-3rd)
where each increment represents one semi-tone.
DETUNE
PW
This parameter enables the pitch of the VCOs to be adjusted
slightly sharp or flat relative to each other. This produces a
richer sound quality caused by two closely tuned oscillators
"beating" from the slight variation in tuning. Range is -31 to
+31 (+/- a 1/4 tone) where 0 is no Detune, -31 is the Flat
limit and +31 is theSharp limit. Each increment of 1
represents varying amounts of Detune: settings close to 0
provide very slight detuning while settings towards the
extremes produce greater amounts of Detune as each higher
number is used.
"Pulse Width" - If PULSE is selected as the VCOs1
waveform (see Pulse wave selection in VCOs Page 2
discussion), this control sets the ratio of the Pulse Width's
duty cycle. Range is from 0 to 63 where 63 is an extremely
narrow Pulse that becomes gradually wider as the settings
approach 31, the setting for a Square wave. From 30 on
down, the Pulse becomes even wider with the same audible
chacteristics as narrow Pulses until 0 is reached and very little
sound is heard.
In describing the audible characteristics of a Pulse wave, a
very narrow or very wide Pulse (settings towards the
extremes of the range) has a "nasal" quality and is traditionally
used to synthesize woodwind instruments like Oboe and
Bassoon or plucked-string instruments such as Harpsichord.
A wide Pulse (settings around 31 where the Square wave is
produced) has a "hollow" sound quality and resembles a
Clarinet.
108 Matrix-12 Owner's Manual

Oberheim Matrix-12 Specifications

General

Brand	Oberheim
Model	Matrix-12
Category	Synthesizer
Language	English