The speaker presumably thinks that there is an aspect of "sonic interaction" that transcends mere "performance" -- some sort of collective ambience or atmosphere that is more than just the sum of the individual sounds the musicians make and is therefore harder to capture on a recording. The expression has a faint whiff of BS to me.
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NewguestMaybe the term "sonic interaction" says that on the recording they wanted to capture not only their own performance, but also the reaction of the audience to their show.That's not how I understand it.
NewguestOn second thought I think it's all about them playing in a studio.
NewguestThey want to capture not only how the play, but also a moment on tape that could never be captured quite the exact same way againThe difficulty I have is in understanding the distinction between "performan