SEP (PS Multi-Track Sequence Data): Difference between revisions

Revision as of 02:27, 23 October 2026
RemmyLee
(File format pages from the Sony File Formats manual)

Revision as of 02:47, 23 October 2026
RemmyLee
(Formats: Sony paragraph voice; HMD, RSD extended files, full BS code book; sprite editor formats)

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## Overview

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A SEP is a package that holds several [SEQ](/formats/seq/) data files. The SEQ data files are then managed as one file.[^ff43]

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A SEP is a package that contains several [SEQ](/formats/seq/) data files, so that the SEQ files can be managed as one file. A program accesses one SEQ in the package by the ID number returned when the SEP is opened and by the SEQ number. The access functions are described in the Run-Time Library Reference.[^ff43]

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A program accesses one SEQ in a SEP by two numbers.[^ff43]

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The first number is the ID returned when the SEP is opened. The second is the SEQ number.[^ff43]

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The access functions are described in the Run-Time Library Reference.[^ff43]

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## Structure

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The SEP header has the following fields:[^ff44]

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The SEP opens with an ID and a version. Each SEQ in the package then follows with its own SEQ ID, timing fields and data size, and its score data runs to an end-of-SEQ marker. The fields and their byte counts are shown below.[^ff44]

Table: SEP header

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| Version | 2 |

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Each SEQ in the package follows with its own header:[^ff44]

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Table: SEQ entry in a SEP

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| End of SEQ | 3 |

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Figure 200 gives the tempo field as 3 bytes for SEQ 0 and 2 bytes for SEQ 1.[^ff44]

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Figure 200 of the manual gives the tempo field as 3 bytes for SEQ 0 but 2 bytes for SEQ 1. The table above follows SEQ 0.[^ff44]

## References