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low-pass mono-izer ?

Posted: Sun Aug 11, 2013 11:06 pm
by Mister Natural
let's say high-passing back to stereo at something like 150hz . . .

how do I set up using native non-MAX efx in LIVE8 ?

thanks

Re: low-pass mono-izer ?

Posted: Sun Aug 11, 2013 11:41 pm
by timday
i'd try two chains in a live rack, EQ8s for the crossovers, utility on the mono chain set to mono-ise the track.

Re: low-pass mono-izer ?

Posted: Mon Aug 12, 2013 12:17 am
by florian_bl
I made a rack for this using Ableton Live plug-ins only. Explanation (for the one knob) and download here: http://florianbl.tumblr.com/post/159432 ... -mastering

Re: low-pass mono-izer ?

Posted: Mon Aug 12, 2013 4:50 pm
by Mister Natural
florian_bl wrote:I made a rack for this using Ableton Live plug-ins only. Explanation (for the one knob) and download here: http://florianbl.tumblr.com/post/159432 ... -mastering
THAT ^ is exactly what I was looking for

thanks !

Re: low-pass mono-izer ?

Posted: Mon Aug 12, 2013 7:34 pm
by jaomumu
EQ8 mid/side mode > cut the bass in the side channel - thats all 8O :wink:

Re: low-pass mono-izer ?

Posted: Mon Aug 12, 2013 7:40 pm
by marcoskohler
How do dedicated plugins normally do this though? Do they just cut the bass in the side channel? Or do they collapse the side bass to the middle, which could lead to some phasing issues?

Re: low-pass mono-izer ?

Posted: Mon Aug 12, 2013 8:43 pm
by jaomumu
marcoskohler wrote:How do dedicated plugins normally do this though? Do they just cut the bass in the side channel? Or do they collapse the side bass to the middle, which could lead to some phasing issues?
All Mid/Side processors transforming the (2channel) Left/Right signal into a (2channel) Mid/Side signal. Means the Mid channel is transformed by "Left plus Right" (which is actually a pure mono mix) and the side channel is transformed by "Left minus Right (Left + phase inverted Right)".
In the side signal you will find every information which is not mono (the difference of Left and Right).
After this transformation you can do individual processing on the Mid (mono) and on the Side (difference) channel as well. After those processing they will be mixed back to the normal stereo signal.
The processing of the EQ8 is obviously a EQing.
If you have massive phasing problems in between the left and the right channel then indeed this could lead to a problem (also like the methods the other users mentioned above) because, as stated above, the Mid signal is a pure mono mix.
For example it might be possible that you will loose some power in the bass.
Then you could try to balance this with a bass boost in the mid signal.
The advantage of Mid/Side processing (especially when trying to get the bass frequencies to mono) is, that there is no further filtering necessary (which could lead to extra phasing problems).
Also the transformation into a Mid/Side signal is mathematically very easy and therefore very cpu-friendly.

As a extra information to this theme: Also in the early days of cutting vinyl there was Mid/Side processing involved (for example the Fairchild compressor with a Mid/Side mode on board).