The HiBy R6 has a system-wide PEQ with 10 bands.
To tame the somewhat shrill Eris, I came across the following post:
https://forum.headphones.com/t/harmonicdyne-x-zeos-eris-measurements-official-discussion/24153
The problem was - a 14-band EQ & a LowShelf for me as a bass lover - meaning 5 frequencies too many.
Since I couldn’t find a suitable tool for conversion, I wanted to find out if an LLM (Grok) could help me with a stunning result!
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Question:
Can you make a 10 band parametric equalizer out of these 15 bands?
PK = Peak, LS = Low Shelf
Preamp: -6.00 dB
Filter 1: ON PK Fc 90.0 Hz Gain -2.0 dB Q 1.41
Filter 2: ON PK Fc 600.0 Hz Gain -2.0 dB Q 1.70
Filter 3: ON PK Fc 150.0 Hz Gain -5.0 dB Q 1.10
Filter 4: ON PK Fc 220.0 Hz Gain -1.5 dB Q 2.00
Filter 5: ON PK Fc 300.0 Hz Gain -2.5 dB Q 1.20
Filter 6: ON PK Fc 1300.0 Hz Gain -9.0 dB Q 4.00
Filter 7: ON PK Fc 1250.0 Hz Gain 9.0 dB Q 1.50
Filter 8: ON PK Fc 3360.0 Hz Gain -2.5 dB Q 2.50
Filter 9: ON PK Fc 5900.0 Hz Gain -4.0 dB Q 3.00
Filter 10: ON PK Fc 8500.0 Hz Gain -4.0 dB Q 1.41
Filter 11: ON PK Fc 9400.0 Hz Gain -3.5 dB Q 5.00
Filter 12: ON PK Fc 12300.0 Hz Gain -3.0 dB Q 4.00
Filter 13: ON PK Fc 1665.0 Hz Gain 3.5 dB Q 7.00
Filter 14: ON PK Fc 1184.0 Hz Gain -2.0 dB Q 4.00
Filter 15: ON LS Fc 55.0 Hz Gain 5.5 dB Q 0.70
Grok:
To reduce the 15-band parametric equalizer to a 10-band version while preserving the overall frequency response as much as possible, we need to consolidate overlapping or closely spaced filters and prioritize the most impactful adjustments. The process involves combining filters with similar frequencies, averaging their gains and Q factors where appropriate, and ensuring the spectral shape remains consistent. Here’s the reasoning and the resulting 10-band EQ:
Analysis and Consolidation
1. Low Frequencies (55–300 Hz): There are multiple filters in this range (Filters 15, 1, 3, 4, 5). These can be consolidated into fewer bands by prioritizing significant adjustments and combining nearby filters.
• Filter 15 (Low Shelf, 55 Hz, +5.5 dB): This is a broad boost at the low end, critical for bass response. Keep it as is.
• Filters 1 (90 Hz, -2.0 dB), 3 (150 Hz, -5.0 dB), 4 (220 Hz, -1.5 dB), 5 (300 Hz, -2.5 dB): These are all cuts in the low-mid range. The most significant is Filter 3 at 150 Hz with -5.0 dB. Combine Filters 1, 3, 4, and 5 into a single peak filter by approximating their combined effect. A center frequency around 150 Hz (dominant cut) with a gain of approximately -3.5 dB (weighted average) and a moderate Q (around 1.5) captures the essence of these cuts.
2. Mid Frequencies (600–1665 Hz): Filters 2, 6, 7, 13, and 14 fall here.
• Filter 2 (600 Hz, -2.0 dB): A mild cut, can be kept as is or combined later if needed.
• Filters 6 (1300 Hz, -9.0 dB), 7 (1250 Hz, +9.0 dB), 14 (1184 Hz, -2.0 dB): These are closely spaced around 1200–1300 Hz. Filters 6 and 7 almost cancel each other out due to opposing gains at similar frequencies. Their net effect is minimal, but Filter 14 adds a slight cut. Consolidate these into a single filter around 1250 Hz with a small cut (-2.0 dB, similar to Filter 14) and a moderate Q (around 3.0).
• Filter 13 (1665 Hz, +3.5 dB): A distinct boost with a high Q, worth keeping as is for its specific effect.
3. High-Mid Frequencies (3360 Hz): Filter 8 (3360 Hz, -2.5 dB) is isolated and can be retained as is.
4. High Frequencies (5900–12300 Hz): Filters 9, 10, 11, and 12 cover this range.
• Filter 9 (5900 Hz, -4.0 dB): A significant cut, keep as is.
• Filters 10 (8500 Hz, -4.0 dB), 11 (9400 Hz, -3.5 dB), 12 (12300 Hz, -3.0 dB): These are all cuts in the high-frequency range. Combine them into two filters to reduce complexity:
• One around 9000 Hz (averaging 8500 and 9400 Hz) with a gain of -3.75 dB (average of -4.0 and -3.5 dB) and a Q of about 3.0 (blending their sharpness).
• Another at 12300 Hz, retaining Filter 12’s -3.0 dB and Q of 4.0, as it’s distinct at the upper end.
5. Preamp: The preamp setting (-6.0 dB) is retained to maintain overall gain structure.
Resulting 10-Band Parametric Equalizer
After consolidating, the 10-band EQ is:
• Preamp: -6.00 dB
• Filter 1: ON LS Fc 55.0 Hz Gain 5.5 dB Q 0.70
• Filter 2: ON PK Fc 150.0 Hz Gain -3.5 dB Q 1.50
• Filter 3: ON PK Fc 600.0 Hz Gain -2.0 dB Q 1.70
• Filter 4: ON PK Fc 1250.0 Hz Gain -2.0 dB Q 3.00
• Filter 5: ON PK Fc 1665.0 Hz Gain 3.5 dB Q 7.00
• Filter 6: ON PK Fc 3360.0 Hz Gain -2.5 dB Q 2.50
• Filter 7: ON PK Fc 5900.0 Hz Gain -4.0 dB Q 3.00
• Filter 8: ON PK Fc 9000.0 Hz Gain -3.75 dB Q 3.00
• Filter 9: ON PK Fc 12300.0 Hz Gain -3.0 dB Q 4.00
• Filter 10: (Unused, set to OFF or neutral)
Notes
• The consolidation prioritizes filters with larger gain changes (e.g., Filter 3’s -5.0 dB, Filter 9’s -4.0 dB) and distinct roles (e.g., the low shelf at 55 Hz).
• Overlapping filters (e.g., 1250 Hz and 1300 Hz) were merged by approximating their net effect, reducing redundancy.
• The Q values were averaged or adjusted to maintain the intended sharpness or breadth of each filter.
• This 10-band EQ should closely approximate the original 15-band response, though minor differences may occur due to the reduction. If precise matching is critical, you could simulate both EQ curves in software (e.g., FabFilter Pro-Q) to fine-tune.
