The same original source, the same chain. A has Auto EQ off; B applies Auto EQ after Impact. All other stages are identical.
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A · Integrated loudness—
B · Integrated loudness—
Measured average spectrum
A · OFFB · POST
Numerical spectrum values
Raw values. B−A includes all chain interactions. In matched mode, the plot adds the matching gain shown below.
Hz
A · dBFS
B · dBFS
B−A · dB
22
-49.82
-50.18
-0.37
28
—
—
—
34
-40.08
-40.41
-0.33
43
-32.61
-32.94
-0.33
53
-31.49
-31.81
-0.32
66
-32.8
-33.14
-0.34
81
-31.44
-31.71
-0.28
101
-30.35
-30.56
-0.21
125
-33.12
-33.19
-0.07
155
-32.88
-32.74
0.14
193
-35.76
-35.29
0.47
239
-35.91
-35.38
0.53
297
-36.5
-35.81
0.68
369
-38.74
-37.84
0.9
458
-41.79
-41.1
0.68
568
-40.98
-40.15
0.83
705
-47.43
-46.33
1.09
874
-46.55
-45.05
1.5
1085
-52.34
-50.61
1.73
1346
-51.79
-49.93
1.86
1671
-58.28
-54.62
3.66
2073
-58.68
-55.57
3.11
2573
-63.15
-60.35
2.8
3193
-60.3
-57.56
2.74
3962
-57.51
-54.89
2.62
4916
-55.0
-52.81
2.19
6101
-51.94
-50.46
1.48
7571
-48.94
-48.2
0.75
9395
-46.38
-46.18
0.2
11659
-43.53
-43.58
-0.05
14468
-41.47
-41.62
-0.15
17954
-39.53
-39.69
-0.17
Average over the complete 16-second excerpt, 32 logarithmic bands. Gaps indicate bands without a resolved FFT bin. A static final-output plot, not the internal Auto EQ curve. Matched mode includes the constant matching gain.
What to listen for
Compare bass weight, chord body and percussion attack. A/B switching preserves audio position; a 20 ms crossfade reduces switching clicks. Both sources run on the same audio clock.
“Raw level” preserves rendered levels. “Matched loudness” uses a constant gain calculated from integrated loudness; it adds no compression.
Source and method
Original instrumental generated procedurally for Soundvex, without external recordings or samples. This is an illustrative demonstration, not a track from a station catalogue.
44.1 kHz stereo, 16-bit PCM WAV. Seconds 20–36 of a 36-second programme, with a common 5 ms boundary fade. Adaptive-leveling profile, bass +1.2 dB, AGC off, Bass EQ off, 2 dB reserve.
Measurements and provenance
Measurement
A · OFF
B · POST
Raw LUFS
-20.9 LUFS
-20.8 LUFS
Raw true peak
-3.9 dBTP
-4.0 dBTP
Excerpt LRA
0.9 LU
1.1 LU
Matching gain
0.0 dB
-0.1 dB
R128/true peak measured with FFmpeg ebur128. LRA from a short excerpt does not characterize an entire programme. Spectrum uses 4096-sample Hann windows, hop 2048 and mean stereo power.
Exact render identity
auto-eq-original-groove-v2 · v2 Engine: 02ffb90ea2ff1f869fded45f07c4d3a63d2c5c5771f65c8af6addc0d4af6e337 A SHA-256: 877b287e75c33a35a835e135782eafcc31481e9f390c69721dcea24ca4b5f202 B SHA-256: aa7bff7945249afaa84e37bd9caeb4c792c90f4d55fa67f5da92e0a952b1579b