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

Revision as of 02:22, 23 October 2026 RemmyLee (Hardware and system software pages from the Sony manuals)	Revision as of 02:27, 23 October 2026 RemmyLee (File format pages from the Sony File Formats manual)
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	+	---
	+	title: SEP (PS Multi-Track Sequence Data)
	+	type: format
	+	summary: Package of several SEQ data files managed as one file.
	+	category: File formats
	+	info: ID = SEQp
	+	---
	+
	+	## Overview
	+
	+	A SEP is a package that holds several [SEQ](/formats/seq/) data files. The SEQ data files are then managed as one file.[^ff43]
	+
	+	A program accesses one SEQ in a SEP by two numbers.[^ff43]
	+
	+	The first number is the ID returned when the SEP is opened. The second is the SEQ number.[^ff43]
	+
	+	The access functions are described in the Run-Time Library Reference.[^ff43]
	+
	+	## Structure
	+
	+	The SEP header has the following fields:[^ff44]
	+
	+	Table: SEP header
	+
	+	\| Field \| Byte count \|
	+	\| --- \| --- \|
	+	\| ID (SEQp) \| 4 \|
	+	\| Version \| 2 \|
	+
	+	Each SEQ in the package follows with its own header:[^ff44]
	+
	+	Table: SEQ entry in a SEP
	+
	+	\| Field \| Byte count \|
	+	\| --- \| --- \|
	+	\| SEQ ID \| 2 \|
	+	\| Resolution of quarter note \| 2 \|
	+	\| Tempo \| 3 \|
	+	\| Rhythm \| 2 \|
	+	\| Data size \| 4 \|
	+	\| Score data \| Any \|
	+	\| End of SEQ \| 3 \|
	+
	+	Figure 200 gives the tempo field as 3 bytes for SEQ 0 and 2 bytes for SEQ 1.[^ff44]
	+
	+	## References
	+
	+	[^ff43]: Sony Computer Entertainment Inc. File Formats. November 1998. Page 4-3.
	+	[^ff44]: Sony Computer Entertainment Inc. File Formats. November 1998. Page 4-4, Figure 200.