these pages last revised 
March 17, 2015

What's New

PRAXIS v2.52 

Having problems with soundcard glitches?  

We strongly recommend troubleshooting with the program "DPC Latency Checker" (free from Thesycon).  Great for testing for system time errors!

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Audio DiffMaker
v3.22
A paper about Diffmaker  was  presented at the October 3, 2008 AES Convention in San Francisco.
...find and isolate differences made to the audio signal by components or tweaks 

New  Example
DiffMaker "dyf" result files now available for download!

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VISTA:  
Praxis version 2.4x  is now compatible with Windows Vista (though many soundcards still aren't!!).  If you have the choice, though, stay with XP.  VISTA's sound card handling is less "measurement system friendly" than in previous Windows versions.

SEE NOTE ON SOUNDCARD MIXERS IN VISTA (revised 10 Nov 2007)

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Using the M-Audio Transit under VISTA.  M-Audio has a beta driver available, but using it can be tricky.  Read how here.

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Liberty Instruments, Inc. develops and markets audio measurement and analysis software and hardware for acoustics, designers of loudspeakers and electronics, engineers, and researchers. 

(1.41 2.49)

Downloadable Articles:

Distortion Isolation article and result wav files.
Updated May 7, 2006

Praxis users using the Audigy 2 ZS Notebook (and probably other Audigy 2 sound cards) should update to PRAXIS version 2.3x and also see the revised article
"Making 96kHz Sample Rate Measurements with PRAXIS on a Laptop
with the Audigy 2 ZS"

What makes a speaker sound good?  An exploration into measurements on a multimedia speaker (the now discontinued Monsoon MM1000 panel) subjectively determined to "sound good", to try to see what makes it tick.

Room Sound Convolution
    (Revised 6 Sept 2004)
pdf instructions and data files detailing how to use PRAXIS to archive and reproduce the sound of a room and sound system.  Can be used even in PRAXIS' no-cost "Free Mode".  Used in the SynAudCon Architectural Acoustics course.

Tracking down Audio Glitches
Settings and troubleshooting hints to use when  your computer and soundcard is missing samples, losing synch, or stuttering.

BUG info for Script Writers.  Check this if you are writing a Praxis Script in DelphiScript, and using more than two forms!

Ten Essential PRAXIS Tricks That You Can't Possibly Continue to Live Without Knowing

Taking the SynAudCon Architectural Acoustics course? Click here for an article with deatailed instructions and  the PRAXIS files you need!.(Works with PRAXIS in free mode).