Sorry to bring up and old thread here, but has anyone used any RTA software on a computer using the soundcard? I've experimented with an older program called SpectraLab and it seems to work well. Any thoughts on calibration? How far out could it be?

Mark

 

I used to use one called "Freqanal" I got it from download.com and it worked really well. for either real time, or averaged measurements.

 

are you sure thats not freakanal

 

MLSSA takes a long time to compute results?? Not that I've ever seen...maybe on a 8086. It's drastically faster, more accurate, and offers the best noise immunity as compared to any swept sine wave system (such as LMS). MLSSA or any MLS (Maximum Length Sequence) based programs are very much preferred for production because they are soooo fast.

Clio is the most universal because it offers swept sine and MLS measurements both with true acoustic phase measurement capability. LMS can do phase via a minimum phase transform but its not true acoustic phase rather a minimum phase calculation based on the slopes in the frequency response.

IMHO, Cliolite is the best professional type system cost vs performance wise @ $599US.
http://www.e-speakers.com/products/cliowin.html

IMHO, TrueRta is the best laptop/soundcard type system cost vs performance wise @ $40-100US.
http://www.trueaudio.com/rta_abt1.htm

Both systems require calibration for optimal accuracy.

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[ May 04, 2005, 08:37 PM: Message edited by: Sphinx ]