True Audio: Audio Spectrum Analyzer and Loudspeaker Design Software

About TrueRTA | TrueRTA FAQs | TrueRTA Download Page | TrueRTASupport Page | Order TrueRTA!

TrueRTA audio spectrum analyzer software, in combination with your PC, provides a test capability that would normally require thousands of dollars worth of traditional audio test instruments. Now you can afford the powerful audio testing capability normally seen in better audio research and design laboratories! TrueRTA Level 4 exceeds the performance of many $3,000.00 laboratory analyzers for only $99.95!

NEW v 3.5 for Windows 7

The new version is fully compatible with Windows 7 and now allows selection of audio devices from within the software. Quick Sweep now operates reliably at all signal levels. Many small improvements and bug fixes have been made. A revised Quick Start section fully details setup under Windows XP and earlier, Vista and Windows 7. Application Note 1 covering self test of the PC sound system has been greatly expanded and should now answer many of your questions and get new users started using the software more quickly.

Screenshot of Spectrum Analyzer in Bar Mode

A New DIY Project:
The Murphy
Corner Line Array

TrueRTA Includes: ► Real Time Analyzer
	1 Octave FREE! 1/3 Octave $39.95 1/6 Octave $69.95 1/24 Octave $99.95
►Signal Generator
► Digital Level Meter
► Oscilloscope
Click Here to learn more about TrueRTA!
Read about TrueRTA Level 4 from Acoustic Software Reviews

Follow the buzz
How to Use TrueRTA
at the
Audio Forum!

Questions about Sound Cards, Mics or Calibration?
Click here: TrueRTA FAQs

New to Real Time Analyzers? Click below to go to the Audio Visual Science Forum:

Read the .pdf Affordable Audio Review:

		Level - 1	Level - 2	Level - 3	Level - 4
Product Price:		1 Octave FREE!	1/3 Octave $39.95	1/6 Octave $69.95	1/24 Octave $99.95
General Product Specifications:
	Fully Adjustable Frequency Scale (10 to 50 kHz)	�	�	�	�
	Fully Adjustable dB Scale (+20 dBu to -160 dBu)	�	�	�	�
	Adjustable dB SPL Scale (+180 dB SPL to 0 dB SPL)	�	�	�	�
	Data Import	�	�	�	�
	Data Export	�	�	�	�
	Project Files Saves all Data and Notes	�	�	�	�
	Sampling Frequencies up to 96 kHz	�	�	�	�
	Prints Detailed Reports in Color and B&W	�	�	�	�
Real Time Analyzer Specifications:
To 50 kHz!	1/1 Octave Real Time Analyzer	�	�	�	�
	1/3 Octave Real Time Analyzer		�	�	�
	1/6 Octave Real Time Analyzer		�	�	�
	1/12 Octave Real Time Analyzer		�		�
	1/24 Octave Real Time Analyzer		�		�
	Cursor Readout of Data	�	�	�	�
	20 Memories which can be overlaid	�	�	�	�
	Data Utilities (Average, Smooth, Shift, Sum & Difference)	�	�	�	�
	Automatic Measurement Notes as well as your own notes	�	�	�	�
Advanced Frequency Response Measurement:
Quick Sweep (Based on a digitally generated chirp)				�	�
Signal Generator Specifications:
	Square Wave (adjustable)	�	�	�	�
	Triangle Wave	�	�	�	�
	Saw Tooth Wave	�	�	�	�
	Impulse Wave	�	�	�	�
	Sine Wave, 5 to 48 kHz	�	�	�	�
	Pink Noise	�	�	�	�
	White Noise		�		�
	Digitally Generated Sweep			�	�
Oscilloscope Specifications:
	Dual Trace 48 kHz Scope	�	�	�	�
	Freeze Display	�	�	�	�
	Measurement Notes	�	�	�	�
	One Trace Saved with each Project File	�	�	�	�
Digital Multi-Meter Specifications:
	Volts RMS	�	�	�	�
	dBu (rms and peak)		�	�	�
	Crest Factor in mV/mV			�	�
	Crest Factor in dB			�	�
	Optional Printing of the on screen meter displays	�	�	�	�
Calibration Specifications:
	Line-In and Line-Out Level Calibration	�	�	�	�
	SPL Calibration	�	�	�	�
	Relative Mode	�	�	�	�
	Microphone Calibration Files	�	�	�	�
	X-Curve / House Curve	�	�	�	�
	PC Sound System Calibration			�	�
	Digital Sweep Calibration			�	�

Click Here to learn more about TrueRTA!

Click Here to download the FREE TrueRTA Level 1
Level 1 NEVER EXPIRES! Vista Compatible!

Read What Our Customers Say About TrueRTA!

"I find this quite an amazing package. To put this amount of test gear together in earlier days would have cost me tens of thousands of dollars. Very nicely designed, very user friendly, and tells me all I need to know in a quick and efficient way. I take my hat off to your designer !! - Arthur"

�Not sure I need the 1/3 octave BUT I have used the free version so much I feel compelled to pay you for your efforts. This is a great program and an indispensible tool for managing feedback at live events.
� Joe�

"I have a 20-year old 1/2 octave hand held from Heath Kit. It just can't compare to your program.
Just to look at the 1/24 octave was worth $100.00. This is truly a cool program that fills the need
of someone like myself who can't justify $3000.00. for an upgrade!" - Ray

"Congratulations on your accomplishments, this is a neat software analyzer." - Pietro

"Love the product! I've run some tests on some of my favorite recording
equipment and found your software to be right on the money. Keep up the good work!" - Tom

"What an easy to use and useful tool. Very cool!" - Mike

"Excellent, Practical Software for the Audio Engineer'" - Leslie

"A very good value on a very useful tool." - Bob

"Impressive software, Thanks!" - Bill

Introduction to Loudspeaker Design
	"I highly recommend this book to anyone entering the difficult but rewarding, area of speaker design. I found it a pleasure to read." Read the Speaker Builder Review! Introduction to Loudspeaker Design' is written for hobbyists, students, technicians and engineers seeking an overview of the technology of loudspeakers. Starting with a brief history of audio developments the book begins by introducing the concepts of frequency, pitch and loudness and proceeds to develop the idea of a loudspeaker as a system. The book covers such topics as loudspeaker design tradeoffs, spatial loading, diffraction loss, cavity effect and enclosure construction. A complete chapter is devoted to the subject of crossover design. The appendices contain technical references, design aids and a chart depicting 18 different loudspeaker enclosure types.
Chapter Headings include: Audio Basics Loudspeaker Basics Advanced Loudspeaker Topics Enclosure Design & Construction Crossover Design Driver Parameter Measurement Frequently Asked Questions
Click here to learn more! Click here to order!

Audio Books

Free Demos

Audio Topics

From True Audio

'Introduction to Loudspeaker Design"
by John L Murphy

The book for hobbyists, technicians, and engineers seeking an overview of the technology of loudspeakers.

"I cannot imagine a better 'Introduction to Loudspeaker Design' than this book"

The perfect companion to our software! Buy Both and SAVE!

Only
$24.95!

	Order ILD Now!
	Read the full book review
	Read About ILD!

True Audio, in Association with

Invites You to Visit
The Audio Engineering Bookstore

Lancaster's Active Filter Cookbook
by Don Lancaster

Loudspeaker Design Cookbook
by Vance Dickason

to the Bookstore

Download our Real Time Analyzer!
	TrueRTA Level 1 for Windows 9x, NT, ME, 2000, Vista, XP

Download a Demo of our software and see for yourself what loudspeaker design is all about!

	Get the WinSpeakerz demo and Demo Manual! for Windows 9x, NT, ME, 2000, Vista, XP
	Get the Audio Concepts Demo for Windows 9x, NT, ME, 2000, Vista, XP
More Free Stuff

	Download a Box Chart for Windows
	Download a Baffle Reaction Radiation Spreadsheet
	Download a SPL to % Efficiency Conversion Chart
	Download a Linkwitz Transform Circuit Design Spreadsheet

	Murphy on Tubes vs. Solid-State
	Echo, Reverb and Time Delay Effects
	John Murphy's Posts on Audio Topics

Speaker Topics

	Overview of Crossovers
	Overview of Crossovers-II
	Linkwitz-Riley Crossovers
	Neutralizing L(e) with a Zobel
	Design a Linkwitz Transform Circuit

Audio Links

	Organizations
	Speaker Driver Manufacturers
	Speaker Component Sources
	Speaker System Manufacturers
	Speaker Suppliers
	Speaker Reconing
	Audio Search Engines
	Other Audio Sites
	Woodworking Sites

Catalog

Reviews

Customer Comments

Meet John Murphy!

	Windows software
	Book - ILD
	Amazon Book Store

	Speaker Builder reviews Introduction to Loudspeaker Design
	Secrets of Home Theater and High Fidelity reviews WinSpeakerz
	Voice Coil Magazine on WinSpeakerz

"I use WinSpeakerz frequently. It's extremely easy to use, fast, accurate and helpful. It provides a quick way of trying many "what if" scenarios. Any speaker designer from beginner to pro will find WinSpeakerz to offer exceptional value. Highly recommended!"

Mike Dzurko,
President,
Audio Concepts Inc.