Seeking Help Converting Posted Parameters to Neutron Equalizer
Jun 10, 2015 at 1:02 PM Thread Starter

#### fauxpossum

I have a pair of Westone 4 IEMs.
I'm using the Neutron app on Android.

I'm trying to configure the parametric equalizer
using the numbers from Lunatique [thanks for your effort, by the way].

If I understood them correctly, they are for :
center frequency [Hz] --> gain [dB] --> bandwidth in octaves [oct]
00150 Hz ------------------> -03 dB -----> 2.37 oct
05500 Hz ------------------> -03 dB -----> 1.02 oct
10000 Hz ------------------> -10 dB -----> 0.60 oct
20000 Hz ------------------> +10 dB ----> 1.13 oct

The Neuron equalizer expects the parameters as follows:
low cutoff frequency [Hz] ----> gain [dB] --> Slope [Q]
center frequency [Hz] --------> gain [dB] --> bandwidth in octaves [oct]
center frequency [Hz] --------> gain [dB] --> bandwidth in octaves [oct]
high cutoff frequency [Hz] --> gain [dB] --> Slope [Q]

I could easily convert octave bandwidth to Q with a converter, as recommended.
2.37 oct --> 0.545313 Q
1.13 oct --> 1.24466 Q

But I feel that the original plot gives a set of band pass parameters,
and not high pass and low pass parameters as the equalizer expects at the ends.

Are there any recommendations for the conversion?

If it is simple, my best guess is
to treat the high and low frequencies are band passes also:

f.min = f.center - 0.5 * BW
f.max = f.center + 0.5 * BW
BW = f.center / Q

f.min = 150 - 0.5 * (150 / 0.545313) = 12.4643
f.max = 20000 + 0.5 * (20000 / 1.24466) = 28,034

Thus:
frequency [Hz] -------------------------> gain [dB] --> slop [Q] or bandwidth in octaves [oct]
f.min 00012.4643 Hz ------------------> -03 dB -----> 0.545313 Q
f.cntr 05500.0000 Hz ------------------> -03 dB -----> 1.02 oct
f.cntr 10000.0000 Hz ------------------> -10 dB -----> 0.60 oct
f.max 28034.0000 Hz ------------------> +10 dB ----> 1.24466 Q