I N T R O D U C T I O N
Using the Manual
In a number of places through this manual you will see this logo:
This means that there is extra video content that we feel might help you while you use the product on the following page:
spitfireaudio.com/manuals-archive/bt-phobos/
A word on Polyconvolution
So what is convolution?
In mathematical terms it is used to refer to an operation on two functions producing a third function. In audio, convolution is usu-
ally mentioned in reference to an impulse response taken from a physical space, applied to a sound in order to simulate the reverb
characteristics from that space. In Phobos, we convolve one sound with one or more others to produce totally new sounds.
What is Polyconvolution?
In Phobos there are four
Source units
. You can see them numbered 1 - 4 at the top of the interface. Each
Source unit
can load
either a Loop or a Tonal sound.
When a loop is loaded into a
Source unit
the same sound plays regardless of which key is pressed. The pitch of Loop sounds is not
directly affected by the key used to trigger the sound.
When a Tonal sound is loaded into a
Source unit
its maximum polyphony is determined by the number of keys in its key range
and any overall polyphony limits that have been configured in the Settings page. The pitch of Tonal sounds is adjusted to match the
key that was used to trigger the sound.
There are three
Convolver units
which appear in Phobos at the three points of the central triangle. Each
Convolver unit
can load
any of the same Loop or Tonal sounds.
These
Convolver units
are slightly different from conventional convolution reverb-like effects. In a similar way to the
Source
units
, the
Convolver units
are polyphonic. This means that for each key that triggers one of the
Convolver units
a separate and
new impulse response is created. This impulse response will be generated on the fly. This is what we mean by the ‘polyconvolution’
engine in BT Phobos.
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PHOBOS - USER MANUAL
