10.6

Table Of Contents
565Logic Pro Instruments
The large, round, elevated Filter (and Distortion) section is in the center. Its placement and
design are both symbolic and practical, as the filter plays a central role in Ultrabeat. The
Filter is discussed in Logic Pro Ultrabeat filter section.
The Filter receives its signal from the following sound sources:oscillator1, oscillator2,
the noise generator, and the ring modulator. The outputs of these sources are represented
by the three round objects, and the rectangular ring modulator section to the right, that
surround the Filter.
One level down—from front to back—each sound source output object provides modulation
controls. These determine how modulation sources, such as the LFO and envelopes, affect
each sound source. See Logic Pro Ultrabeat modulation overview.
Each sound source also features a small Signal Flow button (red, when active). This is
used to determine (and indicate) whether the signal of the associated sound source should
proceed through the Filter or bypass it—before being routed to the Output section.
The Output section is shown to the right. Signals sent from the Filter can pass through two
equalizers and a stage for stereo expansion or panoramic modulation. You can also set
the initial output level and trigger behavior in this section. See Logic Pro Ultrabeat Output
section overview.
The output of the drum sound is then sent to the Assignment section mixer. See Logic Pro
Ultrabeat Assignment section.
Ultrabeat sound sources
Logic Pro Ultrabeat oscillator overview
Ultrabeat oscillators are used to generate waveforms. Oscillator2 can use a sample in
place of a waveform. The signal of one or both oscillators is then sent to other portions of
the synthesizer engine for shaping, processing, or manipulation.
Oscillator1 can be frequency-modulated by oscillator2, for FMsynthesis sounds.
Oscillator2 can be ring-modulated with oscillator1.
Oscillator2 can use an audio file (a sample), in place of a synthetic waveform. The
sample is output as the oscillator2 signal.
Other sound sources include a separate noise generator and ring modulator that can
produce additional signals to those generated by the oscillators. See Logic Pro Ultrabeat
ring modulator and Logic Pro Ultrabeat noise generator.