Data Recorder Options

Tool Options

  • Max File Length
    The Data Recorder streams data to audio files. A single audio file will be limited to the length specified, here, in hours, minutes, and seconds. Tap on the time to reveal a picker control with which the maximum duration may be specified, up to 2 hours, 59 minutes, and 59 seconds. Tap on the time again to hide the picker control.

Auto Start Triggering

  • Enable
    Recording can be configured to automatically start after the source channel signal exceeds a specific threshold. Use the Enable switch to turn this feature on or off. When this option is enabled, pressing the record button will put the tool in 'Record' mode, although no data will be recorded until a trigger event occurs. While the tool is in 'Record' mode, but before a trigger event has occured, it will display 'Waiting for Trigger' in its status display (to the right of the Record/Stop and Start/Pause buttons).
  • Source
    Any available input or output channel may be selected as the source for the trigger. All recorded channels will be simultaneously triggered from the source channel, regardless of which input and/or output channels have been selected for recording.
  • Threshold
    A trigger event occurs when the source channel signal exceeds some user-defined threshold value, at which point recording will begin (including data that precedes the trigger event, as specified by the pre-trigger delay). Specify the threshold value in the text box.
  • Pre-trigger Delay
    The pre-trigger delay specifies how much of the raw time signal is to be preserved and included in the recording prior to the trigger event. You may specify a value between 0 and 100 ms.

File Options

  • Include Location
    When this option is enabled, the latitude, longitude, and altitude at the time of the measurement will be embedded within the audio file and included in optional info files (see below). Horizontal and vertical accuracy (in meters) will also be included.
  • Audio File Format
    Data can be saved in AIF, CAF, or WAV audio files.
  • Filename Suffix
    To make sense of multiple files written in a single recording session, each file can be assigned an auto-incremented numeric suffix (Counter) or a compact suffix indicating the date and time the file was saved. The suffix will be appended to the end of the filename as indicated in the Data Recorder's main display.
  • Save Info File
    The Data Recorder embeds metadata within the audio file (chunkID: 'FHdr') including date, time, location (if enabled), input channel details, and sensitivity calibration information. This metadata can also be optionally saved to a separate info file for easy retrieval. The info file will have the same name as the audio file.
  • Info File Format
    The info file can be saved in CSV, TXT (tab-delimited), or MAT-file format.
  • Keep Recording
    To allow the recording to continue after the maximum file length has been reached for the current recording session, switch this option on. When one file is finished, another will be recorded to, up to the File Limit described below. This option will only have an effect if the File Limit is greater than 1.
  • File Limit
    If the Keep Recording option is enabled and File Limit is greater than 1, the Data Recorder will stream to a new audio file each time the current max file length is reached, until the file limit is met. So, for example, if the maximum file length is 1 hour, Keep Recording is enabled, and File Limit is 8, the Data Recorder, if allowed to run long enough, will capture 8 hours of data which will be split into 8 audio files.