In this figure, there are three filters applied at different frequencies, as follows: Examine the following figure, in which amplitude is shown as the solid blue line and phase as the dotted blue line: The key point in understanding how rePhase works is that it allows you to adjust the amplitude and phase responses of the filter independently. We will cover each of these tabs in the examples below. The phase and amplitude correction features are accessed from the main set of tabs: The interface is quite intuitive and includes a graph of the predicted response and a large number of controls, many accessed via tabs: The rePhase user interface allows you to import a measurement from your measurement program and then manipulate the amplitude and phase of the correction filter. In this app note we will give an example of each of the two loudspeaker design scenarios above. While it is possible to use rePhase to correct for room issues, it is intended to be a loudspeaker design tool. RePhase accomplishes this by generating FIR filters that you load into an OpenDRC or miniSHARC. Implement a linear-phase loudspeaker crossover 'from scratch' Loudspeaker measurement with UMIK-1 and REWĬorrect/linearize the phase of conventional loudspeaker crossovers-whether digital or analog.Please see the following app notes for background information: To effectively use this app note, you will need to be familiar with some basics of acoustic measurement, loudspeaker design and DSP.

You will need a measurement program such as Room EQ Wizard (REW) and measurement hardware such as the UMIK-1 and a microphone stand. A miniDSP 2x4 HD (or its kit version) for a for 2 x IN, 4 x OUT configuration running the 2x4HD1 plugin.Ībility to run acoustic measurements.A miniSHARC kit and the miniSHARC 4x8 plugin for up to 4 input channels and 8 output channels (requires implementation of your own I/O via I2S).An OpenDRC-DA8 with a stereo digital input and 8 unbalanced analog outputs, and the miniSHARC 4x8 plugin.An OpenDRC-DI with stereo digital input and output, and the OpenDRC 2x2 plugin.rePhase can be downloaded from rephase official page. Example 1: correcting loudspeaker phase.With the aid of a real-time FIR filtering engine or 'convolver' such as miniDSP's OpenDRC or miniSHARC, the result is a linear-phase loudspeaker system. rePhase can also generate linear-phase crossovers. rePhase generates finite impulse response (FIR) filters that 'reverse' the phase shifts introduced by a loudspeaker crossover. RePhase is a Windows-based freeware program written by Thomas (aka 'pos'), a long time miniDSP community member.

Linear phase crossover for mac os