Passive Speaker Designer (PSD) - Lite
· FRD/ZMA file import
o Includes format checking to reject header and trailer data and allows any non-numeric delimiter
o Allows browsing web-based directories and directly imports web files
· Response Editor tool to browse the FRD/ZMA data, edit individual values, and scale the entire data set.
· FFT-based phase extraction algorithm to ensure measurement data is minimum phase
· Additional Delay tool to add/subtract a fixed delay to the measurement data
· Minimum group delay calculation
· Allows selecting between Single Driver, 2-Way and 3-Way designs
· Configuration used to dynamically configure other menus in the program
· Color customization that is saved with the project data
· Chart customization, including colors, line widths, backgrounds, grid and 3D
· On-line Help files that provide both “how-to” and “how it works” assistance
· Graphics scaling algorithms to resize the windows and chart zoom.
· Printing support for all charts
· Data save routines for most modules to export the data.
· Schematic-based user entry for intuitive crossover design
· Mouse wheel cycles through common inductor, resistor and capacitor values
· Use of background processing ensures a responsive user interface
· Wide choice of schematic modules to implement nearly any crossover topology
· Tabbed-based driver and chart selections to simplify the interface and ensure usability on laptops
· Allows drawing cabinet front and side views with up to 20 corners for each view
· Calculates internal volume using external dimensions and wall thickness.
· Calculates driver volume and adjusts the internal volume calculation to account for bracing and port volume
· Calculates driver offsets according to location on the baffle and front baffle angle, and automatically updates the Crossover Module with the offsets
· Uses a ray-tracing algorithm to model Baffle Step and edge diffraction
· Allows modeling open-back cabinets by using additional ray-tracing from the back of the driver
· Multi-threaded design takes advantage of multi-core CPU’s for the ray-tracing
· Models woofer low-frequency response using the accurate Benson model
· Models sealed, vented and passive radiator designs
o Plots SPL, Excursion, Impedance and Consumed Amplifier Power
· Provides a splicing tool to replace the measured response with the more accurate modeled response below a specified frequency
· Provides a “what-if” tab for quickly evaluating various woofer alternatives
· Allows calculating the response of both the woofer and midrange
· Calculates the effective power from rated power and driver resistance
· Models the system response to a wide range of active filters commonly used for woofers:
o Low pass and high pass, up to 8th order
o 5-band Parametric equalization
o Linkwitz Transform
o Rumble/boost filters used in subwoofer plate amplifiers
· Provides schematic-based interactive tool for calculating component values for the Linkwitz transform and Rumble/boost filters
· .NET development tools for best compatibility with Windows
· All attributes and key states defined by a Loudspeaker Object Model
o Documented in a Help file accessible from the opening menu
o Defines the schema for the XML Save/Load file
o Supports interoperability with other design tools that use the same object model
· Extensible framework that supports both passive and active loudspeaker design
o PSD: Superset of PSD-Lite that includes driver, component, and amplifier databases
o ASD: Active Speaker Designer for controlling DSP
· Driver support for USB interface to control real-time hardware
o Allows expansion to address driver and system response measurements
o Allows real-time control of DSP for interactive response adjustments