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RA - Response Area Data Collection

The program RA runs on the VAX/VMS computer and is used for single unit data collection with auditory (sound) stimuli.

It can be used to present many different types of auditory stimuli, e.g. tones, AM, Clicks, Noise etc. One or two channels of sound can be presented with many possible variations of Intensity (SPL), Duration Time, and Number of Reps. etc.

Upto two parameters (e.g. FREQ and SPL) can be varied systematically (or randomly) over a specified range. These are called the RA-variables, or more specifically, the X-variable and the Y-variable. Some possible RA-variables are FREQ, SPL, DELAY, FMOD, DMOD etc.

Unit (spike time) data can be collected with a user settable time base of 1.0 microsec or larger. All times are synchronized to the start of stimulus onset.

RA was developed at the University of Wisconsin - Madison, with support from the National Institutes of Health. It is available for use free of charge for any legitimate purpose. It is not guaranteed to be bug free, though we will make a reasonable effort to fix bugs if you report them to the address below. There is no warranty of any sort.

RA was first created in 1977 to run on a Datacraft 6024/5 computer (with 32 kWords of memory). It was converted in 1985 to work on VAX/VMS computers, and is still available for OpenVMS (both VAX and AXP). Currently (2002) a version for Microsoft Windows 9x/ME/NT/2000/XP is under development.

The following information is currently available online:

RA is supported on the following platforms:

     Microsoft Windows NT/2000/XP
     Compaq OpenVMS/VAX v5.5-2 or higher
     Compaq OpenVMS/AXP v6.2 or higher

Please send comments or questions to

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This page last modified on : 3/7/2002