Mobile Measurement
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PCDAQ Driver/Audio - FreeView Sound

FreeVIEW Sound is a virtual instrument application incorporating 

• Data logger
• Data analyzer / FFT analyzer
• Oscilloscope 

software that can be used with all sound cards capable of 16 bit resolution using the FreeVIEW Sound driver software.

It is intended for people who don't want or need to program their own applications and just want to capture, store and post process data offline or online.

Screenshot:

Features

• FreeVIEW consists of a these applications:
• Oscilloscope: Online display, shows directly captured data with trigger. Storage mode without trigger also available.
• Data logger: Writes data directly to disk for high speed operation without display.
• Offline display shows data that was written to disk in binary. Data reduction/compression methods (+) available as well for viewing large amounts of data.
• Chart recorder: for low speed recording up to 5kHz. Shows data while it is captured.
• Data analyzer: Data or signal post processing using simple text-based formula input. Extension to the Offline Display. Result is shown again in XY graph window. 8 formulas/graph windows, called "virtual channels", available. Without entering a formula, 8 separate graph displays plus the main display window exist that can be scrolled/zoomed independent of each other.
• Designed for Microsoft Windows® 95/98/ME, Windows® 2000 and Windows® XP operating systems.
• Stand-alone application, does not need installed programming language or additional application.
• Works with huge files up to 2GByte size, that is equivalent to 1G samples.
• Space-saving data storage, only two byte for one data point needed.
• GUI based, 800x600 screen resolution minimum required, 1280x1024 recommended for data analyzer. 1600x1200 points needed for showing all displays without overlap.
• Works with up to 8 channels at once.
• Zooming and panning implemented.
• Two markers in the display area for easy measurement and event identifiaction.
• Up to 8 virtual channels  Data of one or multiple input channels is preprocessed by user-defined formula and shown. There are lots of applications for these virtual channels: Conversion of physical units, for example, if thermocouple elements are used, or power calculation of two channels voltage and current, spectrum analysis, data filtering, only to give a few examples.
• Displays up to 65000 points per channel and more, depending on RAM and computer speed.
• Data reduction methods for accessing and displaying very large amounts of data:
• Skip: data in between in skipped, only every N-th point is shown. N ranges from 2 to 32768.
• Min/Max: A data pair is calculated from a block of N points. The pair indicate minimum and maximum value of the data set.
• Mean: The arithmetic mean value of N data points is calculated and shown.
• Seperate displays for input and virtual channels.
• Shows current computer's load. Issues warning messages if load is too high.
• Supports all card's features:
• Trigger capability
• All input voltage ranges
• Differential inputs
• Print Screen facility. Also usable with monochrome printers because different point types (signs) can be set. Supports color as well.
• ASCII data export directly from display window: Formatted numbers in real data format are written to disk. Data can be post processed with all major applications.

More information