• HifiVoice
• Audio
  • Milestones
    • Inspiration Stage
    • Ceramique Stage
    • Wooden Stage
    • Acoustical Stage
    • Measurement Stage
    • Electrical Stage
    • Financial Stage
    • Information Stage
      • Audio
      • Acoustics
      • Music
      • Software
      • Terminology
      • Literature
      • Web
    • Conclusions
    • Acknowledgements
  • Classic 25
  • iPod
  • DIY DAC

Software

Speaker Workshop

Filter design software (PC, freeware). The simulated response calculated by this software is reported to have good correlation with the real results, so this makes crossover filter design much more predictable and repeatable. The software expects that measured curves of the units are provided by means of so-called.frd files. The electrical impedance and phase are provided by means of a so-called .zma file. They need to be imported, and subsequently filter circuits can be built graphically (about any topology is allowed!), and simulated. An example project file can be found on the downloads page.

Fuzzmeasure

Speaker measurement software, (Mac, shareware). It is user-friendly software, that is true plug-and-play. Starting-up, connect the MobilePre, and after a few seconds the first measurements are there!! Highly recommended, my PC-friends even say they have a good reason to switch from a PC to a Mac because of this program! :)



Measurements can be done by using MLS, pink MLS, or frequency sweeps. The program allows simultaneous display of different measurements by selecting them in the left pane. Curves can be subtracted for compensating for deviations in the measurement equipment, and processed with different FFT windows and smoothing. I haven’t calibrated the setup yet, so I can only perform relative measurements, which is sufficient for speaker design.

For the PC, a nice alternative is the shareware program Arta.

Links

Some more info on measurements:
- Muller and Farina explain how sweeps can be used to obtain impulse response and distortion curves.


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