Appendix C - Avalon Vs. Tb-303 Sequencer - Abstrakt Instruments Avalon Reference Manual

APPENDIX C - AVALON VS. TB-303 SEQUENCER

1 AVALON VS. TB-303 PATTERN STRUCTURE
The pattern structure of the Avalon and TB-303 differs in the way that pitch & time data are stored. The Avalon saves pitch & time attributes
together as a pattern step. The TB-303 has independent pitch and time steps for each pattern, they are not saved 1-to-1 as a pattern step.
1.1 AVALON PATTERN STRUCTURE
As shown below, pitch & time attributes are saved together as a pattern step.
Every time the pattern step is advanced both pitch & time attributes are advanced, hence a series of pitch & time attributes always correspond 1-to-
1 to define a pattern step.
Pattern steps correspond directly to the step button indicators on the control surface of the Avalon:
1.2 TB-303 PATTERN STRUCTURE
TB-303 pitch and time attributes are always programmed separately. A pattern consists of independent sequences of pitch steps and time steps.
Pitch step attributes are only advanced when a note event occurs in the sequence of time steps. As a result, the series of pitch step attributes does
not always correspond 1-to-1 with the series of time steps. Specifically, if a tie or rest is programmed on a time step, the pitch step is not advanced.
This is shown in the graphic below - Time Step 3 does not have a note event programmed, it's a tie/rest, so the pitch step is not advanced.
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AVALON - Reference Manual