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SIGNAL Sound File Format

Application Note 5 7

File Header Block #2

User-Defined Label Fields

1-4 L BLAB1 16 characters

... ...

37-40 L BLAB10 16 characters

User-Defined Axis Labels

41-55 L XLAB X-axis label (60 characters)

56-70 L YLAB Y-axis label (60 characters)

Reserved for System

71-128 N Reserved

Format Differences between SIGNAL and RTS

SIGNAL and RTS sound files follow the same format, and can generally be interchanged

freely. Note that the RTS reads and writes only time files, while SIGNAL writes time,

spectrum, and spectrogram files. SIGNAL and RTS sound files differ in the following

respects.

1. RTS sound files are written in integer format, while SIGNAL sound files may be

stored in integer or real format. Thus SIGNAL will accept all RTS files, but to

export from SIGNAL to the RTS, SIGNAL must store the file in integer format

(using the INTWRT switch or W /I).

2. SIGNAL and the RTS write different file ID's in the PGM_STAMP and

PGM_VERSION elements, which can be used to identify file origin. SIGNAL 3.1

writes "SIGP3.10" and RTSD 1.1 writes "RTS 2.20". SIGNAL 4.0 and RTS 4.0

write "SIGP4.0x" and "RTS 4.0x", where "x" is the minor version number.

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Engineering Design NIDisk Guia do Utilizador Página 11