I did this for myself but someone else might find it useful:
It's the measured effect of the +/- 13 step Bass, Mid and Treble controls on the Vauxhall Insignia Navi 900 (Intellilink RF900 Navi) system.
https://docs.google.com/spreadsheets...at=interactive
Looks like it's about 1dB per click, with Bass being a low shelf, Treble being a high shelf, and mid being a peaking filter at 1k.
It's the measured effect of the +/- 13 step Bass, Mid and Treble controls on the Vauxhall Insignia Navi 900 (Intellilink RF900 Navi) system.
https://docs.google.com/spreadsheets...at=interactive
Looks like it's about 1dB per click, with Bass being a low shelf, Treble being a high shelf, and mid being a peaking filter at 1k.
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