Most Transparent Multiband Splitter

VST, AU, etc. plug-in Virtual Effects discussion
KVRian
579 posts since 4 Jan, 2007

Post Thu Sep 30, 2021 11:49 am

WTF is based on IIR subtraction, that's why it doesn't introduce latency. ReaFIR is FIR, so it shouldn't have these problems and almost null with the original signal if latency compensation is setup correctly. Weird.

KVRian
703 posts since 13 Feb, 2013

Post Fri Oct 01, 2021 2:35 am

Please don't think that linear phase filters are better. They are just different. There is no perfect filter. There is no invisible crossover.

The idea of multiband is that the benefit is bigger than the harm you do. What works best depends on the material and processing you do. Even the slops makes a big difference.

I think a x-over filter should offer some different filter types and also some slopes, so that you can try what works best for every case.

For example. I would never use linear phase for lows in a kick (pre-ringing, they do also smear the transients, in this case worse than minimal phase). And would never use minimal phase for parallel processing of the same signal (comb filtering due to phase shift).

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KVRian
1042 posts since 14 Apr, 2008 from /* whitenoise */

Post Mon Oct 04, 2021 3:02 am

A implementation of the Linkwitz Riley filter for splitting as Max4Live device.
Includes an article about how it's build an some math stuff I don't get :D

https://www.metafunction.co.uk/post/the ... on-live-10
/* whitenoise */ /* abandon */ /* reincarnated */

KVRian
579 posts since 4 Jan, 2007

Post Mon Oct 04, 2021 11:32 am

midi_transmission wrote:
Fri Oct 01, 2021 2:35 am
Please don't think that linear phase filters are better. They are just different. There is no perfect filter. There is no invisible crossover...
x1000. I couldn't agree more.

What you described is exactly how I did on MixMaxtrix, now there is only the linear phase one left to do.

KVRian
579 posts since 4 Jan, 2007

Post Mon Oct 04, 2021 11:42 am

midi_transmission wrote:
Fri Oct 01, 2021 2:35 am
... And would never use minimal phase for parallel processing of the same signal (comb filtering due to phase shift).
Notice that it is possible to recreate the allpass response of a given linkwitz Riley filter, so one sends the dry signal to the allpass chain and the wet signal to the crossover. I left that out of MixMaxtrix, as I found that each band's dry/wet would achieve the same when internal processing and it could probably be not obvious to everyone what that fx would be for.

Alternatively, a more bruteforce solution is to apply the same crossover with no processing to the dry signal.

KVRian
1173 posts since 23 Sep, 2004 from Kocmoc

Post Tue Oct 05, 2021 6:40 am

noiseresearch wrote:
Mon Oct 04, 2021 3:02 am
A implementation of the Linkwitz Riley filter for splitting as Max4Live device.
Includes an article about how it's build an some math stuff I don't get :D

https://www.metafunction.co.uk/post/the ... on-live-10
Thanks for this! I will surely try on next time when needing to split up stuff. :tu:
Soft Knees - Demoscene - Live 10 - Diva - Omnisphere - Slate Digital VSX - TDR - Kush Audio - Fabfilter - PA - Valhalla - Fuse - Pulsar - NI - OekSound etc...

KVRian
703 posts since 13 Feb, 2013

Post Tue Oct 05, 2021 10:30 am

rafa1981 wrote:
Mon Oct 04, 2021 11:42 am
Alternatively, a more bruteforce solution is to apply the same crossover with no processing to the dry signal.
Yes, thanks for this addition. I was thinking more general, that I would never use an eq on just one channel. But for the case x-over it's worth to mention.

KVRist
128 posts since 19 Jun, 2021

Post Thu Oct 21, 2021 3:46 pm

DMG Multiplicity claims to have "bit transparent" crossovers. So until the signals are altered, it remains identical to the source audio.

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