Logo by Alegra Designs, alegradesigns@optusnet.com.au Last update 17 - May - 2008.

Bodzio Software Pty. Ltd.: We are based in Melbourne, Australia and have been developing loudspeaker system design software for personal computers since 1990. This site is intended to provide information about our WinXP™ programs: SoundEasy and BoxCad.

SoundEasy V15.0 has been released. This release is shipping with 30 User requested functions.

SoundEasy + EasyLab system is a complete modelling and measurement software package. ( for full description of the program features, please download the PDF manual below )
SoundEasy operates in time and frequency domains and models the complete design and advanced (Phase/SPL/Zin - constrained) optimisation process of multi-way loudspeaker system, including WMTMW arrays. The program allows for a complete characterisation of all drivers, including complex transfer function for sound pressure (amplitude frequency response) and input impedance. Direct data import functions from PC-based measurement systems are included. SoundEasy will even tell you if your imported phase is correct and will help you to correct it (using Hilbert-Bode Transform, HBT, during the import). Enclosure design includes 13 types of enclosures, including H/U Dipoles and handles multiple driver configurations. Up to 4 identical drivers can be placed on the front panel to analyse diffraction distortion and mutual radiation impedance. Large-signal analysis is provided and includes: BL(x) and Cas(x) non-linearity, port compression and thermal power compression effects. Our NEW, full-screen, scrollable, re-sizable CAD section of the program, handles all electronics of the passive/active system such as: complete and detailed passive or active crossover design, and time/frequency/impedance compensation circuits. The CAD system allows you to include advanced DSP components, like Linear Phase Filters, Time Delay Elements, and our own Super-Components, Mega-Components and Modular Crossover concepts, none of which can be implemented in standard, passive crossovers. 100 of popular filter/crossover types are built-in. Finally, complete system responses are obtained by taking into account mutual 3D alignment of the drivers on the front panel, including off-axis simulations, tilting and rotating drivers. As the Ray-Tracing Methods are really not suitable for low-frequency (below 300Hz) room modelling, we have implemented extensive evaluation of room and car cabin acoustics using Image Method and the powerful Finite Element Method for complex room geometries - ideal for 4 sub-woofer placement evaluation, including two dipole subwoofers. The FEM includes modelling of absorption at each node and allows you to include opened windows, carpets, heavy drapes, (any size) etc. in your analysis. The program is quite large. It contains over 60 plotting screens/control boxes for modelling various design processes and a number of "calculators" for performing specific modelling functions. There are also numerous dialogue boxes for customizing plotting and display functions. The program includes support for design and optimization of Transient Perfect crossovers. Also, a Digital Filter (FIR implemented as Fast Linear Convolution) function has been provided for auditioning your crossover design via sound card. Our implementation includes simulating sound propagation delays due to different spatial location of the acoustic centers of drivers. You can also write your own, and read WAV files. Small-Thiele loudspeaker model has been expanded by using FEM to model enclosure resonant modes.

Our Digital Equalizer has been implemented to enable perfect filtering with simultaneous equalization of ANY irregularities of SPL response curve. This has been accomplished by modifying the targeted filter transfer function by the inverse SPL response of the driver, and at the same time cancelling the parasitic "tails"of the SPL using Hilbert-Bode Transform. Our Equalizer allows you to audition your favorite audio-CD via the sound card and also includes simulating propagation delays due to different spatial location of the acoustic centers of drivers. This feature is significantly more advanced than typical Digital Filter - see SoundEasy Reference Manual, Chapter 9 for details. Filters and Equalizers up to 2x4-way can be constructed and evaluated with suitable, MME-compliant sound card.

Finally, Digital Room Equalizer (DRE) allows you to step out of the loudspeaker box and do something constructive with your room acoustic. The DRE is a HBT-based, minimum-phase equalizer, designed to put "final touches" on your room transfer function. It includes full-screen SPL pixel editor for precise modifications to your measured SPL curves and other processing tools. Please see SoundEasy Reference Manual, Chapter 14 for details. Will run on most 16-bit, full duplex, stereo sound cards.

EasyLab - Advanced is an expanded section of the SoundEasy program, dedicated to frequency and time domain measurements of the driver and room acoustics. The system incorporates 24 screens / large control boxes in total, including: Analogue (continuos tone, sine sweep, quick sweep, and gated sweep) and digital (MLS and pre-emphasized MLS) measurement screens have been implemented for measuring SPL and Zin. Both methods include powerful post-processing functions, including amplitude/time zoom-in on Impulse Response, scroll Impulse Response and analog input buffer, HB Transform for easy determination of acoustic center of the driver. Dual Channel Oscilloscope with built-in 6 signal generators: Sine Wave, Square Wave, Pink Noise, White Noise, Two-Tone and Tone-Burst. Next, Spectrum Analyser with various screen control option, THD display, and the same set of signal generators. Cumulative Spectra Decay (CSD) Analyser now includes Tone-Burst Waterfalls as well. There is also a Small-signal (T/S) and Qb extraction screen using Delta Mass and Delta Compliance methods, RLC Measurement screen, Distortion Analyser, including estimation of non-linear coefficients of BL(x), K(x) and Le(x) using truncated Volterra series expansion method, and finally, advanced Non-linear Parameter Measurement screen and modeller based on driver's differential equations and numerical differentiation. EasyLab employs extensively MLS-type of test signals, Hilber-Bode Transforms and curve-fitting methods in it's measurement system. "Curve Arithmetic" function for Digital and Analogue measurement functions is also provided. Your SPL field measurements can be saved as a raw-data files, so that you can perform all post-processing and presentation functions later, at your convenience - see SoundEasy Reference Manual, Chapter 16 & 17 for details. Tone burst testing method is also implemented. The next addition to the EasyLab system is RT60 measurement capability. The system incorporates Schoeder Backward Integration and two methods for noise reduction: Truncated and Subtracted.  THD/IMD measurement system has been added recently, and finally, a Cepstral Deconvolution function has been implemented in this release.

BoxCad is a sophisticated software tool (separate program) focused on enclosure analysis using acoustic impedance models and electrical impedance models - highly recommended for advanced designers. 10 models are built-in for your convenience, but you can let your imagination fly and invent an esotheric enclosure and analyse it using BoxCad - unlike using other loudspeaker modeling programs, you are NOT restricted to built-in enclosure models. Again, frequency and time domain analysis is available. The results of the analysis can be combined with active/passive circuits designed with built-in electronic CAD system. And yes!, you can model Passive Radiator Band-Pass enclosures of any type with BoxCad. If you are concerned with vent non-linearitiy during turbulent flow - perhaps PR system will satisfy your requirements. And how about an Acoustic Cannon ?.

Recommended Sound Cards or Digital Crossovers
1. For usage with EasyLab measurement system - you will need full duplex, 16-bit sound card, such as SoundBlaster Live 5.1, Delta 410 from M-Audio, Layla24 from Echo Digital Audio.
2. For Digital Filter and Digital Equalizer - we recommend more advanced cards such as, Delta 410 from M-Audio, FireWire 410, from M-Audio, Layla24, Darla24, Gina from Echo Digital Audio will provide you with 2-in and 8-out configuration. Many standard sound card can also be used for 1x2-way system emulation
3. For Modular Crossover - we also recommend more advanced cards such as, Delta 410 from M-Audio, FireWire 410, from M-Audio, Layla24, Darla24, Gina from Echo Digital Audio will provide you with 2-in and 8-out configuration. Many standard sound card can also be used for 1x2-way systems. Also, you can remotely program Behringer DCX2496 (V1.14) Digital Crossover using this functionality.

With our thanks to the Speaker Builder, Voice Coil and audioXpress publishers, you can now enjoy some of our articles on-line.

1. "Active Equalisation of Loudspeakers" in Speaker Builder, Issue 2 1997, based on BoxCad V1.1 capabilities..
2. "Computerized Loudspeaker Placement Part I" in Speaker Builder, Issue 1 1998, based on SoundEasy V3.00.
3. "Computerized Loudspeaker Placement Part II" in Speaker Builder, Issue 4 1998, based on SoundEasy V3.10.
4. "Low Frequency Acoustics of the Open Plan House". Based on SoundEasy V3.20.
5. "Loudspeaker Diffraction Distortion and Radiation Impedance" in Voice Coil, Volume 13, Issue 9, 1999. Based on SoundEasy V3.20
6."The Auto Passenger Compartment as a Listening Room". Published in Speaker Builder, Issue 1, 2000. Based on SoundEasy V3.30.
7." How Good Is Your Port". Published in audioXpress, September 2001.
8."Subwoofer Placement in NonRectangular Rooms". Published in audioXpress, Issue 9, September 2002.
9."Loudspeaker Motor Non-Linearity - The Simplified View". Soon to be published in Voice Coil magazine.
10."Multi-Way Transient Perfect Crossovers". Some ideas on implementing transient perfect crossovers in SoundEasy
11. "Acoustic Centre Evaluation". Locating AC using Hilbert-Bode Transform.
12. "Cone Break-Up Effects". Modelling of cone break-up using FEM.

The V15.00 release is our most powerful and easy to use upgrade to date and introduces a number of significant changes. These release is recommended for fast Pentium™ processors such as Pentium4™ 1.7GHz. 

List of improvements in SoundEasy V15  

  1. CAD - Component values displayed directly on the schematic. This requires the components to be spread around to make room for the labels. Also, all built-in circuits have new templates, that are suitable for the new labelling format.
  2. CAD - Component values on the schematic track tweaking process from TAB control.
  3. Enclosure Design - Algorithm improvements to Diffraction Screen.
  4. Enclosure Design – number of axis scales increased from 2 to 4.
  5. 3D Rotation screen shows Z-axis offsets now.
  6. Speaker type selected via “Configure System” button are automatically shown in “Front Panel” control box.
  7. New, improved Main Menu layout reflects better flow of design process.
  8. CAD  / System / Polar Plots m - UP/DOWN arrows implemented to tweak component values in component data entry dialogue boxes. “Tab” key moves the focus to next data entry field. CRTL key changes the step.
  9. CAD / System / Polar Plots - Mouse wheel scroll UP/DOWN implemented to tweak component values in component data entry dialogue boxes. “Tab” key moves the focus to next data entry field. CRTL key changes the step.
  10. CAD / System / Polar Plots - Left Mouse Button clicked on component auto-scrolls component into view in TAB list box for component tweaking.
  11. CAD  / System / Polar Plots - Component tweaking function in plotting TAB enhanced by using UP/DOWN arrows to select component, and LEFT/RIGHT key to tweak the value.
  12. Crossover Optimizer – optimization controls for “Zconstrained” moved to Optimizer TAB. New optimization algorithm for Zmin has been implemented and Slider to control the “Step” factor has been added.
  13. Crossover Optimizer – optimization controls for “Zconjugate” moved to Optimizer TAB.
  14. Crossover Optimizer - Left Mouse Button clicked on component auto-scrolls component into view in TAB list box in Optimizer.
  15. Crossover Optimizer – Layout re-arranged and component list box is changed to “multi-selection” type of list box.
  16. Crossover Optimizer - Accept New Values” button updates list boxes in CAD and TAB.
  17. CAD – Target plots on CAD plotting screen respond to scale settings. Also, target plots stay on screen during crossover optimization.
  18. Added Print button to Digital EQ dialogue.
  19. Added “Export EQ Curve” Digital EQ dialogue. This function exports Equalizer SPL curve for a single driver (typically the default driver). This curve can be used as a target for approximate optimisation of active or passive circuits.
  20. Added “Save File” button in TS Parameters Editor TAB.
  21. Partitioned Convolution Filter implements .WAV re-play at 48kHz and 44.1kHz.
  22. DF, DE default to MMC/WDM 8-channel settings for the sound cards.
  23. Spectrum Analyser shows +10dB/dec (white noise) and flat slope (pink noise) SPL for 1/3oct response for internal generators.
  24. Vertical SPL resolution scale is clipped to 1dB (max resolution).
  25. Added output LED indicators to Signal Generators in Oscilloscope and Spectrum Analyser.
  26. New algorithm for Phase Constrained and Zin Constrained optimization in System. Also updated dialogue box layout.
  27. Dongle serial number shown in ABOUT dialogue box.
  28. Graceful exit if there is dongle error.
  29. Enclosure internal pressure calculations corrected.  
  30. CAD Compare TAB enables hiding curves and has 25-charactes floating label box.

Copy Protection:  USB dongle.

SoundEasy Design Guide by John Kreskovsky, is now available from Music and Design -  http://www.musicanddesign.com. This is a "must read" for anyone interested in SoundEasy program and loudspeaker design and measurement.

Please review EasyLab capabilities, summarized in this file, and SoundEasy advanced algorithms summarized in this file.

BoxCad V4.00 Manual:

Chapter 1 - Introduction - Overview of the program and general specs
Chapter 2 - Operation - Entering data, using CAD and general operation
Chapter 3 - Background - Acoustical tools needed for this program
Chapter 4.1 - Theory - Enclosures - 10 enclosures detailed acoustical impedance schematics
Chapter 4.2 - Theory - Enclosures
Chapter 4.3 - Theory - Enclosures
Chapter 4.4 - Theory - Enclosures
Chapter 5 - Powered Subwoofer - Design example of powered subwoofers
Chapter 6 - Examples - Just a couple of examples

SoundEasy V15.00 Reference Manual:

Chapter_1 -  Introduction - Overview of the program and software functions performed. (NEW)
Chapter_2 - Editor Screen - Entering driver's data, complex transfer function, impedance models used, suspension systems, enclosure dimensions. 
Chapter_3 - Importing Data Files - IMP, CLIO, LMS, DAAS32, MLSSA, includes exporting data as well.
Chapter_4.1, Chapter_4.2 - Enclosure Design Screen - 13 types of enclosures, small and large signal analysis, lots of plots.
Chapter_5 - Enclosure Optimization - Sealed, vented and band-pass enclosure optimizations.
Chapter_6 - Enclosure Response To Rectangular Function - 13 enclosures in time domain, includes impulse, square wave.
Chapter_7 - Car Acoustics - Finite Element Method (FEM) used to solve low-frequency car interior problems
Chapter_8 - Using CAD System - Introduction to our powerful, full-screen electronic CAD system. (NEW)
Chapter_9 - Filter And Crossover Design - Passive / active / digital FIR networks, built-in filters, Linear Phase Filters, MC, crossovers and networks. (NEW)
Chapter_10 - Filter And Crossover Optimization - Advanced optimization of filters or complete crossover. Includes Conjugate impedance Opt.(NEW)
Chapter_11 - Crossover In Time Domain - Time domain response of the crossover/filter
Chapter_12 - System Response Module - 3D placement of drivers on front baffle, off-axis simulation and tilting drivers, vertical and horizontal plots. (NEW)
Chapter_13 - system Optimization - Complete system optimization, including off-axis and tilting drivers (NEW)
Chapter_14 - Room Acoustics - Image Method employed in low-frequency range to solve speaker placement. Includes DRE. Also some theory.
Chapter_15 - Finite Element Method - FEM theory and several of applications of this method to predict speaker placement in non-rectangular rooms. 
Chapter_16.1,  Chapter_16.2 - EasyLab Advanced [Linear] - Operation of all analogue and digital measurement screens Good examples of HB Transform usage .(16.1 NEW)
Chapter_17 - EasyLab Advanced [Non-Linear] - Two methods for extracting non-linear parameters and one non-linear modeller.
Chapter_18 - Recommended Design Sequence - Good overview of processes and program's applicability. Also, some computer issues discussed.(NEW)

You are also warmly invited to join our User's eGroup. Upgrades from 11.0/12.0/13.0/14.0 are available directly from Bodzio Software via email. Please contact us via email for your own copy. Payments options are explained in more details on the User's eGroup site.

Here are some of the users of SoundEasy package.

1. John Kreskovsky, is hosting "Music and Design" website with a numbers of references to SoundEasy. Please visit: http://www.musicanddesign.com

2. Chad Gray, invites you to visit http://chadgray.info/soundeasy, where you can find cool SoundEasy tutorials he has made. Chad can help you with woodworking too.

3. John Krutke from from "Zaph Audio" http://www.zaphaudio.com is another skilled user of SoundEasy.

4. George Soong is a very active member of our User's Group. Please vist his http://augene.blogspot.com/

Distributors of SoundEasy and BoxCad programs are:

1. ORCA, Design & Manufacturing Corp. 1531 Lookout Drive, Agoura, California 91301, USA. Phone: +818 707 1629, Fax: +818 991 3072
Link: http://www.orcadesign.com
2. Old Colony Sound Lab, PO BOX 876, Dept V97, Peterborough, NH 03458, USA. Phone: +603 924 9464, Fax: +603 924 9467
Link: http://www.audioxpress.com
3. Golden Age Music AB, Vitalisgaten 23, S-441 43 Alingas, Sweden. Phone: +46 322 66 5050, Fax: +46 322 66 5051
Link: http://www.goldenagemusic.se
4. W.A.R Audio 203/396 Scarborough Beach Road, Osborne Park, 6017 WA, Australia. Phone: +619 242 5538, Fax: +619 445 2579
Link: http://www.warco.com.au
5. AKKUS, ul. Kochanowskiego 17/66, 84-200 Wejherowo, Poland. Phone: +48 (058) 6723241, 0501 173793, Fax: +48 (058) 6774036
Link: http://www.akkus.com.pl
6. E-Speakers, Los Angeles, California, USA. Phone: +818 907-8942, Fax: + 801 457-3505
Link: http://www.e-speakers.com
7. OUTLINE,Via Leonardo da Vinci 56, 25020 Flero (Brescia), Italy. Phone: +39-030-358-1351, Fax: +39-030-358-0431
Link: http://www.outline.it
8. Musical Transparency DA, Gjærbrøndveien 67, 4886 GRIMSTAD, Norway. Phone: +9-797-9280
Link: http://www.musicaltransparency.com
9. Parts Express Inc., 725 Plesant Valley Dr. Springboro, OH 45066, USA. Phone: +937-743-3000, Fax: +937-743-1677
Link: http://www.partsexpress.com
10. Roppongi Kougaku Limited, 4-4-11, Roppongi, Mianto-ku, Tokyo, JAPAN. Phone: +81-3-3402-5567, Fax: +81-3-3-3402-5563
Link: http://www.ritlab.jp/shop/
11. Cyrus Systems Technology Limited, PO Box 90008-11-23 Taichung, Taichung City 40722, TAIWAN R.O.C., PEOPLE'S REPUBLIC of CHINA and HONG KONG. Phone:+886-4-2531-2506, Fax: +886-4-2531-8884

We are:
Bodzio Software Pty. Ltd.,

ABN 91 507 372 505
PO BOX 2345,
Rowville, 3178 VIC, Australia.

Fax: +613 9 755 7708 (International), or (03) 9 755 7708 (within Australia)
Phone: +613 9 755 7707 (International), or (03) 9 755 7707 (within Australia)
Email: bodzio@interdomain.net.au

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