(Non-)rectangular room shaping

Hallo, I have another stupid question: I think it is common to avoid rectangular rooms with its parallel boardes. In "Sound Studio Construction on a Budget" the author descripes a control room (but I mean recording/live room as well) as a rectangular heavy wall contruction with inner relatively lightwight wall construction to avoid flutter echos in the high and mids only. He said that a nonrectangular outer wall has no advantages, there are also modes, but there peaks and nulls are undeterministic due to unregular room shape (e.g. trapezoid). In the excamples in this forum and on John pages it seem that the inner wall is such a relatively lightwight wall. Deflecting highs and mids. And the basses are treathed with bass traps in the corners and holes. Is this right? Thomas

yes. (wow, that was short! :mrgreen: )

Thanks. Nice to see that I begin to understand...;-)