FabFilter User Forum

*FEATURE REQUEST* Pro-Q 3/4: Yin-Yang (REIMAGINED)

This would be a great feature for Pro-Q, regarding the relationship between frequencies based around 1k (yin-yang), useful for:
• reducing a frequency w/ buildup while adding back an opposing frequency.
• precision rebalance when mastering.

Example - I have a preset with:
• -0.01 dB at 250 Hz
• +0.01 dB at 4k
So that, if there was build up at 250 Hz, that reduction could be balanced out by adding back some 4k.

The plus/minus values allow us to [select + ⌥ + drag] to simultaneously move nodes in opposing directions (one gains up, the other gains down). But if you want to target a different frequency, then you have to also calculate the opposing frequency.

It would be extremely useful if we were able to set a node at the desired frequency, then generate 'node 2' based on the multiple/division around 1k.

Examples of yin-yang pairs:
• 250 Hz build up and 4k counterbalance (÷ into 1k, 4 times)
• 4k build up and 250 Hz counterbalance (× into 1k, 4 times)
• 83.33 Hz and 12k (÷/× into 1k, 12 times)
• 100 Hz and 10k (÷/× into 1k, 10 times)
• 500 Hz and 2k (÷/× into 1k, 2 times)
The common ones are easy to remember, but any other frequency requires breaking out the calculator.

GUI:
Maybe you could colour that second node as a yin-yang symbol (half black, half white), but inherit the same colour shadow as node 1. That way, if you needed another yin-yang pair, each pair would be distinct.

When moving node 1, node 2 would "orbit" around 1k, automatically changing its frequency depending on node 1. Understandably, the corresponding frequency (node 2) would likely jump around a little due to it being a multiple of node 1 (aka. jumping to the next multiple), which could either be a useful visual giveaway that you're using a yin-yang pair, or it may look like a glitch if smoothing isn't applied.

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This next bit may be too confusing for users... but here's the idea:
On rare occasion, you might need a third node, to really emphasise the move (think of node 2 becoming the "mid range band"). What if the additional nodes were labeled with "Y↑" or "Y↓", so you could dictate their position (up or down) with just one click. These arrow labels would also prevent the user from needing to set plus/minus dB values to determine whether a node gains up or down.

Thanks for reading,
All the best!

Ryan
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