Tonal Balance

[Reylon]

Hi Guys,

Any knowledge on creating a tonal balance?
There are 4 bands in my EQ and I would like to have 4 "vu meters" for each band/frequency
low, mid, treble, high... show the current gain of each frequency....Something like this.

[Natan]

@Reylon
You need to split your audio Signal into 4 L - Lm - Hm - H channels, using eq and routing matrix. or Script node.
and then script meters to read Each frequency band.

Not a Simple task!

[Lindon]

@Natan said in Tonal Balance:

@Reylon
You need to split your audio Signal into 4 L - Lm - Hm - H channels, using eq and routing matrix. or Script node.
and then script meters to read Each frequency band.

Not a Simple task!

..and watch for the phasing too...

[Christoph Hart]

This can be achieved with a network of linkwitz-riley filters that guarantee the same phase response for each band (every band needs the same amount of filters so you need to fill up "empty" spots with allpass filters).

[Lindon]

@Christoph-Hart said in Tonal Balance:

This can be achieved with a network of linkwitz-riley filters that guarantee the same phase response for each band (every band needs the same amount of filters so you need to fill up "empty" spots with allpass filters).

cool - I didn't know this - useful...

[Matt_SF]

@Christoph-Hart Interesting ! Do the frequency of the Allpass filters matter when building this kind of network ?

[Reylon]

Sounds interesting but crazy hard to do for a beginner any further help would be highly appreciated.

[Matt_SF]

@Christoph-Hart I tried multi-banding a FX with linkwitz-riley filters like this :

But when analyzing the plugin with PluginDoctor, I'm getting this :

So clearly I'm missing something... Any clue ?...... Peeeeease :)

[DanH]

@Matt_SF how does it look without the all pass filters?

[Matt_SF]

@DanH it looks the same...

[Christoph Hart]

@Matt_SF Yeah, setting these up is super complicated (and I'm working on a template system that creates these for you with the correct parameter connections and values for a correct 2/3/4 band split.

But you're almost there. The frequencies of the Allpasses must match the other filters for a linear phase response, so that each band goes through the same filter coefficients:

Lo:

LP: 200 Hz
AP: 800 Hz

Mid:

HP: 200Hz
LP 800 Hz

High:

AP: 200Hz
HP: 800 Hz

So basically each band needs two filters to be set at 200 and 800 Hz and then you need to set the mode to Allpass for some filters to get the frequency split behaviour.

[Matt_SF]

@Christoph-Hart aaaaaah I get it. Thanks a lot for the info!
And if you make a template for this, it'll be awesome.

[orange]

@Christoph-Hart said in Tonal Balance:

I'm working on a template system that creates these for you with the correct parameter connections and values for a correct 2/3/4 band split.

+1 for Up to 5 bands

[Natan]

@orange said in Tonal Balance:

@Christoph-Hart said in Tonal Balance:

I'm working on a template system that creates these for you with the correct parameter connections and values for a correct 2/3/4 band split.

+1 for Up to 5 bands

Add another +1 on top of that :gem_stone:

[Reylon]

@Christoph-Hart +1 from me too!

[Natan]

@Christoph-Hart I CLearly Hear The Changes by Bypassing the Scriptnode module, any Idea ?

This is Just like what you mentioned above about Frequencies :/

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[Christoph Hart]

@Natan why did you mix jlinkwitzriley nodes (the JUCE ones) with the filters.linkwitzriley? I'm pretty sure their internals are a bit different so this will not work.

[Natan]

@Christoph-Hart
LOL, I'm OUT

Gonna Fix it Now LOL

[Natan]

@Christoph-Hart That's did the trick :) :folded_hands: Legend :gem_stone:

[Christoph Hart]

Alright, I've just pushed a few templates, including frequency splitter up to 5 bands, a dry/wet mixer, and some other utility structures.

If anybody has ideas for more templates, let me know, they are pretty easy to add.