Teac LX Series, Instruction Manual, Page: 15 / 148

About TAFFmat
1-5
ch 1
ch 2
ch 3
ch 4
ch 5
ch 6
ch 7
ch 8
1/6000 sec
Order of recorded data
About TAFFmat
TAFFmat (an acronym for Teac Data Acquisition File Format) is a file format composed of the following:
z
a data file containing A/D (analog to digital) converted data. The file is in binary format with the
extension dat.
z
a header file containing information such as recording conditions. The file is in text format with the
extension hdr.
This document uses the term ID to refer to a collection of data collected from the start of recording on the LX
series until the recording is stopped or paused. For each ID, one data file and one header file is recorded.
A voice memo is recorded as a WAV file with the extension wav.
The above files share a common file name, to which is appended an ID number. When a new file name is
specified, this ID number becomes 1. Each time recording starts, this number is incremented by 1.
A/D-converted data is recorded as 2-byte integers from -32768 to +32767. Negative numbers are
expressed as complements of 2. The byte order is from the lower bytes to the higher bytes. The data order
is as follows: first sampling channel order -> second sampling channel order ->...-> last sampling channel
order. At the LX series, ADC value +/- 25000 repr/- 100 % of the input range.
This document uses the term scan to refer to a collection of data resulting from one sampling. A data file is
a collection of scan repetitions.
Example:
Data of 1 scan when the sampling frequency is 6 kHz:
Standby
REC
Start
FWD
Pause
PAUSE
Resume
FWD
Stop
STOP
Aaaaa001.dat
Aaaaa001.hdr
Aaaaa002.dat
Aaaaa002.hdr