I'm from visual arts background and so, I'm not familiar with technical aspects of sound design. But I'm exploring and learning everyday.
Currently, I'm working on a sound art project, for which I'd need to subtract Audio Signals of Clip B from Clip A to extract the signal difference between the two clips.
Clip A - Field recording of a particular space [ l ] during day time, the crowded hour
Clip B - Field recording of the same location [ l ] during night time, after the crowd has dispersed
So far I've come across some articles on Audio DiffMaker - a Signal Difference Extraction Software, which does exactly what I'm looking for. However, I'm using Mac OS, so I'm unable to use the program. It's not practical for me to run Windows on Bootcamp as all the other programs I use regularly are on Mac platform.
Is there a program that does similar job as Audio DiffMaker? Would Audicity or Ableton Live 9 has the option to extract the Signal Difference from the 2 audio clips?
Looking forward to your constructive advice and suggestions. Many thanks!
15 Oct 2015
Hi! Thanks a lot for your replies.
And thank you @he_artburns for your detailed advice. You perfectly understood what I was trying to achieve with this experiment. I now understand better why it wouldn’t work with programs like Audio DiffMaker in my situation, and how it might work with the “trick” as you've suggested.
My project is about narrating sonic memories of people and spaces. Just like @he_artburns has mentioned, I’m extracting the “sound of the world”, or rather, sonic memories of the people from a particular space within the world. I hope to measure the weight of these memories, to understand the VOID it would create on the other spectrum, if they were to be removed, from this world.
I've tried to look for similar plug-in's to Waves X-noise, which is either free or will not cost as much, but without much success. What is your opinion on H-EQ Hybrid Equalizer and Z-Noise? I also have Adobe Audition installed. Will that work too?
Pardon me please, if I’m asking the question to something that has an obvious answer. I’m unsure how to go about processing this: “...build a destructive EQ with troughs at every major peak you can see on the spectogram and hear in the night sound. Then copy that EQ shape onto a track with the day sound…”. Could you tell me what this process is called, so that I could read up/ explore more on this?
Thank you :)