Friday, July 4, 2014

Sub Bass Triangulation...

Correct EQ-ing of the low frequencies of a song requires decent speakers and room acoustics. Even though we covered some mixing and mastering tricks before, sometimes we might find ourselves in situation in which we have to be away from home for longer periods of time, without access to our main gear.

If you have portable speakers and headphones that you can trust but you are unable to use them for detection of very low frequencies, there is still thing that you can do. Just make a combinator patch and insert it in the end of the audio signal chain. 

The signal inserted in the combinator goes into the first channel of a Line Mixer. An NN-19 device with a Matrix Pattern Sequencer attached to it goes into the second channel of the mixer. 

The output of the mixer goes into a Stereo Imager and the output of the imager is routed to the output of the combinator. 


The next thing you need to do is to find some commercial song which sounds the most similar to your track. Crop some short part of it`s drop and insert it as a sample in the NN-19. 

Set the separators of your track to loop the drop of your song. 

Use the first combinator assignable button to setup channel 1 of the mixer to solo when pushed on and channel 2 to solo when pushed off. This way you can toggle between the loop of your song and the loop of the sampled track easily.

Use the two combinator assignable knobs to manipulate the volume of those two mixer channels. 

The stereo imager in the end of the chain should have crossover at about 150-200 Hz (cutting at the low end you have trouble to hear). Use the second combinator assignable button to solo / unsolo the high frequencies only.

The idea behind the approach is to cut the low frequencies and then to scale the volume of the two tracks using the big VU meter as a helper.





Once the volume has been scaled, you can unsolo the low frequencies and see whether you have put too much sub compared to a professionally mastered track.

Note that this is only a rough approach.