Another update:
I was getting intermittent results in the lower frequencies (sub and bass) and identified the root cause being the RT (Ringing Truncation) phase of DRC-FIR. Once disabled (will revisit later in more detail), the low frequency amplitude corrections consistently snapped into place.
The following are 4 actual sweeps (sub,bass,midrange and tweeter), corrected individually, test convolved individually and merged into an aggregate test convolution of all 4 drivers.
I am working on the better automating the phase integration between the 4 drivers next with current state shown in the last plot (with no FDWing enabled). The phase discontinuity between the bass and midrange panels exhibits itself in a non-flat summing across the XO region (as seen in the waterfall plot at 250Hz) which hopefully will be shortly automated.
Plot windows are displayed with Blackman-Harris-4 windowing, no FDWing and 1/48th/octave smoothing for readability.
176.4kHz sampling rate, 256K taps.
Waterfall using 1/3rd octave smoothing.
Crossover points at 50Hz, 250Hz and 3kHz.
I was getting intermittent results in the lower frequencies (sub and bass) and identified the root cause being the RT (Ringing Truncation) phase of DRC-FIR. Once disabled (will revisit later in more detail), the low frequency amplitude corrections consistently snapped into place.
The following are 4 actual sweeps (sub,bass,midrange and tweeter), corrected individually, test convolved individually and merged into an aggregate test convolution of all 4 drivers.
I am working on the better automating the phase integration between the 4 drivers next with current state shown in the last plot (with no FDWing enabled). The phase discontinuity between the bass and midrange panels exhibits itself in a non-flat summing across the XO region (as seen in the waterfall plot at 250Hz) which hopefully will be shortly automated.
Plot windows are displayed with Blackman-Harris-4 windowing, no FDWing and 1/48th/octave smoothing for readability.
176.4kHz sampling rate, 256K taps.
Waterfall using 1/3rd octave smoothing.
Crossover points at 50Hz, 250Hz and 3kHz.