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Chapter 3
Theory of Operation
Theory of Operation
Th
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Waveform Sequencer Function
Sequencing provides a method of waveform memory compression using a
play table, sequencer memory, and waveform memory. The sequencer
controls how waveforms are accessed and performs the following functions:
• determines the order of play for waveforms stored in memory
• enables the construction of long waveforms from shorter or repeated
segments
• responds to external triggers
• offers several modes of segment advance
• outputs markers
Sequencer Memory
The sequencer memory contains instructions on how to play through the
waveform memory. It can hold up to one million segments (waveforms with
a specified loop count).
Waveform Memory
The waveform memory contains Channel 1 and Channel 2, and output
marker data.
Basic Sequencing
A sequence is a sequential list of segments and may occur anywhere in the
sequence memory.
The waveform playback of each channel is directly controlled by the
sequencer. The sequencer supplies the memory pointers necessary to create
analog signals from the digital data stored in memory. In addition, the
sequencer provides the capability to create sequences made of multiple
waveform segments. This is helpful when constructing long waveforms with
repeating segments. A long waveform might consist of repetitive data that
can be stored as single segments and repeated in the sequencer. This extends
the waveform play time achievable with the available memory.
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