NAM conversion comparison
The same bass DI re-amped through the pedal with the official app's NAM conversion and with open-stomp's (both with the same open-stomp-converted IR), compared with the original NAM model and IR from TONE3000. All takes are time-aligned to the DI and loudness-matched to the reference before comparing.
Listen
Aligned and loudness-matched, so switching is instant and fair. Number keys switch source, space plays/pauses, ← → skip 5 s. Click the waveform, a time chart or a heatmap to jump there.
Tone: long-term spectrum
Average spectrum over the whole performance, 1/6-octave smoothed, relative to the reference's loudest band. The steep drop above ~5 kHz is the cab IR: bass cabs put out almost nothing up there. The shaded region is where the reference is more than 60 dB down.
Difference from the reference by frequency
Each conversion's long-term spectrum minus the reference's. 0 dB is a perfect match. The shaded region is where the reference itself is more than 60 dB down (essentially silence), so differences there don't matter.
Error over time
For every moment, how far each conversion's third-octave band levels are from the reference's (rms over the bands that are playing, dB; lower is closer). Averaged into 0.5 s steps. Below it, the DI input level and where each file clips.
Where and when they differ
Top: the reference's band levels over time. Below: each conversion minus the reference, per third-octave band. Red is louder than the reference, blue is quieter, gray is a match. Blank cells are silence.
Dynamics
Output level against DI input level (50 ms frames, median per 2 dB of input). Steeper means less compression.
Levels and clipping
The files as exported, before any matching.
Clip times
By band
Mean difference from the reference per third-octave band, over the moments that band is playing. Bias is the average (positive = louder than the reference), typical error the average size of the difference. The closer conversion is in bold.