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Spectral Amplitude Modulation Mode (SAM)
When a Side of the Spectraphon is in
SAM
mode (SAM/SAO button is OFF), the incoming signal
modulates the amplitude of individual harmonics of the Odd and Even outputs. The modulation depth is
set by the A and B input attenuators, with visual tickmarks for typical “modular” and “line” level signals.
In this mode,
Slide
selects the fundamental frequency (first harmonic). The incoming signal will be
analyzed in terms of its relation to this fundamental. Focus sets the width or sensitivity of each band (how
close to a given harmonic the input must get in order for that harmonic to be activated). The resulting
collection of harmonics, i.e. the spectrum, can be heard at the Odd and Even outputs. The relative setting
of the fundamental set by Slide and the actual frequencies present in the input sound means that
Slide can also be used to set the relative weight of upper and lower harmonics (if Slide selects a
fundamental that is lower than that of the input sound, the lowest harmonics in the output will have
less energy, resulting in a “brighter” sound).
(The
Red
line represents the First harmonic (aka fundamental frequency), as interpreted by Slide.)
In practice, this means that the Slide control can be used to set which harmonics are emphasized. Slide
works in tandem with Focus to shape the spectral content of the outgoing sound.
Содержание Soundhack Spectraphon
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