Version OS 1.0
7 Sample Based Instruments
While Kick Drum and MBrane are generated by pure analog circuitries, the succeeding
six instruments are built hybridly and consist of mono samples that are run through real
analog filters and VCAs. Each analog sample channel is an independent voice with its
filter and VCA and has its own metallic noise that alternatively can be used as a signal
source or be mixed to the sample.
With metallic noise only, it becomes a pure analog instrument again. Four channels
make use of a multimode filter that is capable of resonance - again they can be used as
true analog instruments with the self-oscillating filter as only sound source if you wish.
For the sake of simplicity, the six analog sample channels are described together. The
HiHat channels and the multimode filter channels differ only in a few filter parameters.
7.1 Sample Engine
7.1.1 SMP Page 1 A (every sampling instrument including X Sample tracks)
7.1.1.1 Pitch < 000-127 >
Controls the pitch of the sample in semitones. A Pitch value of <055> is the nominal
playback pitch of the loaded sample. A very wide range of pitch transposition is
possible.
7.1.1.2 Start < 000-127 >
Defines the start point of the sample. The normal flash memory sample has a length of
64k samples or about 1.35 sec at nominal pitch <055>. The start point value finds the
closest zero crossing in a window of +/- 256 samples.
7.1.1.3 Stop < 000-127 >
Defines the stop point of the sample. The normal flash memory sample has a length of
64k samples or about 1.35 sec at nominal pitch <055>. The stop point value finds the
closest zero crossing in a window of +/- 256 samples.
44 ALPHA BASE Operating Manual
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