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[Hipper]

This question is regarding conversion of bandwidth from octaves to S, perhaps via Q.

The background is that I have JRiver MC 18 on a PC used for headphone playing. I want to try out using the PC on my speaker system. This speaker system is in a well treated room and employs an equaliser, the Behringer DEQ2496. I used REW to measure the room and made manual adjustments to the Behringer's PEQ and GEQ. Both use octaves (1/3, 1/7 etc.) for defining the bandwidth. I thought this might be a simple job of exactly inputting the filters into JRiver. Why should it be so simple!

I note that JRiver's PEQ uses 'S' for bandwidth and the help pages say this needs converting from the usual 'Q' using a complicated formula. In others words what I have to do is convert octaves to Q then to S. I therefore have some questions please:

1. Does MC 18 use S for its bandwidth?
2. Is there a calculator that will convert octaves to S?
3. If not, I know of an octave-Q calculator, so is there a calculator that converts Q to S. The help pages mention an algebra calculator but firstly I can't seem to paste the formula in its box and secondly it means putting in two values for each calculation.

The alternatives I have are I think:

1. Getting some plug-in.
2. Using a 'link' (or 'bridge') from my PC USB to the Behringer's SPDIF.

What a pain!

Just to add, both systems have there own DAC but the speaker DAC is a treasured old one with no USB input.

[mattkhan]

https://yabb.jriver.com/interact/index.php/topic,129609.0.html will help

S is specifically for shelf filters though so this is not your problem

http://www.sengpielaudio.com/calculator-bandwidth.htm can show you how to calculate q from bw

The REW filter editor may also do this - https://www.roomeqwizard.com/

[Hipper]

Thank you. I see what you mean.

It's still a complicated business for a simpleton like me!