Lecture 10 – bucket

1 Mastering

1.1 EQ

  • Start with EQ
  • look for ultra low frequencies that might be reducing your headroom

1.2 Compression

  • Use a low ratio, 1.5-1 maximum, keep the compression subtle
  • The threshold is low then the compressor won’t work very hard
  • Aim for 2 or 3dB of reduction
  • Maybe use compression on individual channels at the mix stage
  • Attack and release times are generally slow

1.3 Limiting

  • Some limiters have oversampling
  • Oversampling takes the audio signal and doubles or quadruples the samplerate so that it can look for inter-sample peaks
  • Don’t use much of this 2 to 3dB of gain reduction is appropriate for mastering
  • Consider going back to the mix to sort out the massive peaks if your limiter is too present, you’re aiming to set the limiter so that you don’t really notice it

1.4 Loudness

  • YouLean loudness meter
  • True Peak
  • Peak to loudness ratio

1.5 How to listen

  • Work on other people’s projects
  • Best thing to do is something extreme with the settings in order to

hear what’s going on then scale them back into something subtle.

Ambsionic Mixing

Here are some bFormat IRs and a nice script to split the files into a format that will work with Reaper’s ReaVerb as shown in class:


The script simply uses sox to convert the 4 channel files from the bformatIRs to two two-channel files to add to two different instances of the reaverb plugin.

Call the script when you’ve put it somewhere sensible, I leave my scripts in dropbox, so, cd to the directory where your IRs are kept

cd directory/of/irs

then run

bash ~/Dropbox/shellscripts/makeIR.sh IRforReaper wav  FuMa

This will make you a folder called IRforReaper, deal with all the wav files and make sensibly named files for the IR reverb.

Here’s a tidy version of the Reaper session


Metadata injection

Always useful, refer to this post:

MetaData – 3