Is there a way to sidechain multipressor?

I am trying to cut about -4db at 2K from a karaoke track but only when vocals are present. I think the best way to do this is by sjidechaining multipressor. Thank you!

Raj

Posted on Feb 7, 2019 11:22 AM

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10 replies

Feb 7, 2019 12:20 PM in response to raj_sangeet

You can't apply a side-chain to the Multipressor. However, here is a quick way to reduce vocals from a track:


  • place a stereo gain plugin on the track (if your track is mono, this technique won't work)
  • phase invert one of the channels (e.g., phase invert the left channel)


Since the vocals are typically mixed in the middle, this will cancel out most of the vocals.


Unfortunately, low frequency instruments (bass, kick drum) are also mixed in the middle, so those go away too. A slightly better but more complicated way to do this is to:


  • route the track to a new bus (say, bus 10)
  • set bus 10 to No Output
  • create a send from bus 10 to bus 11
  • add the gain plugin as described above to bus 11 (make sure to remove it from the source track)
  • create a send from bus 10 to bus 12
  • add a linear phase EQ to bus 12
  • set the lowpass filter to ~200 Hz


The two busses 11 & 12 will combine to give you back the low-end (bus 12) and the mids/highs without vocals.

Feb 8, 2019 4:06 AM in response to raj_sangeet

Thank you so much for replying rzazula. A great trick you taught me. I should have been little bit more descriptive, I actually have one separate track for karaoke and second track for vocals. I want to make little bit more room for the vocals so they are a bit more upfront. I could do this manually by automation but wondering if multipressor will work. Thanks again

Raj

Feb 8, 2019 8:15 AM in response to cigame

Cigame, Thank you so much for this trick. I have setup a compressor on Karaoke track and set the side chain (the one on very top right) to vocal channel. Selected 'Side Chain' from 'Side Chain/Output'. Filter is 'off' and Frequency set to 2K. Q is set to middle. I do see it pumping when vocals come on, compressing about 5 db. Am I doing it right? Thank you so much.

Feb 8, 2019 11:41 PM in response to cigame

Wrong, does not matter how you filter side chain, compressor will duck out full spectrum, that's it how it works ! For your problem, you need multiband compressor or something like a dynamic Eq with side chain ( for example Izotope etc.). For me best is Trackspacer from Wavesfactory. Also, you can try mid EQ from Logics on board EQ in MS mode for static removing problem frequencies.

Feb 10, 2019 3:36 AM in response to Ed Egned

You are technically correct, but if you look at his use-case, he really just wanted to duck the music so the vocal stands out on top. I think the side chain on the standard compressor will do a good job.


But, as you say, it isn't dropping a certain frequency range, it is just reacting to that range on the input and reducing the full spectrum.

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Is there a way to sidechain multipressor?

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