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Parametric EQ - potential bandwidth bug - Printable Version

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Parametric EQ - potential bandwidth bug - ted209 - 06-17-2020

A minor issue, but I've notice some strange behaviour around what is accepted for the "Bandwidth" for the parametric EQ (using the latest MoodeAudio 6.5.2):

The tooltip says "you must enter a value between .12 and 8", but I found that:

0.12 - works
0.13 - "you must enter a valid value"
0.14 - "you must enter a valid value"
0.15 - works
0.16 - works
0.17 - "you must enter a valid value"
0.18 (and above)- works

I discovered this as I wanted to use 0.14 (having converted Q factor of 10). 0.15 is close enough, but thought I'd flag this up anyway.

Thanks!


RE: Parametric EQ - potential bandwidth bug - rhizomusicosmos - 06-17-2020

It could be a limitation in the filter slopes available in the underlying maths used to model the filter and not necessarily a bug. FIR filters are limited in complexity by the number of taps, for example, though I suppose the Parametric EQ in Moode is IIR. I don't know where @Tim Curtis sourced the PEQ module from -- is it up on GitHub?


RE: Parametric EQ - potential bandwidth bug - Tim Curtis - 06-18-2020

It's from the CAPS project
http://quitte.de/dsp/caps.html

@ted209, are you referring to an input validation issue?

I'm able to enter 0.14 no problem.


RE: Parametric EQ - potential bandwidth bug - ted209 - 06-18-2020

Thanks for the replies - I've just done some more testing.

It's an issue with the Edge browser only - I have no such problem with Chrome and Firefox.