Multi-Sub Optimizer Reference Manual

Overview of Use

To use Multi-Sub Optimizer (MSO), you perform the following steps:

  1. Decide whether you want to optimize the subs and their integration with the main speakers, or just the subs by themselves.
  2. Determine how you will configure your AVR and DSP devices before making measurements. [Details: reference section]
  3. Measure the frequency response of your subs, and optionally your main speakers, at multiple listening positions using separate measurement software. [Details: reference section]
  4. Export a text file from your measurement software in FRD format for each measurement. [Details: reference section]
  5. Import the text files into MSO. [Instructions: tutorial] [Details: reference section]
  6. Define filter channels for your subs and mains. [Instructions: tutorial] [Details: reference section]
  7. Add filters, delays and gains to these channels as desired. [Instructions: tutorial] [Details: reference section]
  8. Examine and alter gain, delay, and filter parameter values manually at any time as desired. [Details: reference section]
  9. Associate measurements with the filter channels you've defined. [Instructions: tutorial] [Details: reference section]
  10. Assign measurements to measurement groups (listening positions). [Instructions: tutorial] [Details: reference section]
  11. Make a graph of your measurement groups (listening positions). [Instructions: tutorial] [Details: reference section]
  12. Specify optimization options. [Instructions: tutorial] [Details: reference section]
  13. Run automatic optimization. [Details: reference section]
  14. List all filter parameters in a filter report. [Details: reference section]
  15. Enter the calculated filter parameters into your DSP device. If you're using a miniDSP device, tedious manual filter parameter entry is not necessary. Instead, export biquad text files from MSO and import them into the output channels of the miniDSP device.
  16. Measure your system with the filter parameters set up as calculated by MSO and loaded into your DSP device. Do these measurements with all subs energized at once.
  17. Export the final measurements as .FRD files from your measurement software.
  18. Import these measurements into MSO as plot-only measurements.
  19. Plot these imported measurements on the same graph that contains MSO's predicted measurements.
  20. If there's a significant mismatch between predicted and actual measurements, you'll need to track down the discrepancy and correct it.

These steps are explained in more detail in the following pages.