![]() If it's linear each major third (1/3 oct) should take about 50ms or less (1500ms/31). QS takes about 1500ms and it goes 10Hz-20kHz. Now we come to TrueRTA and it's Quick Sweep. If a good decay is say 600-800ms then that 250ms would be quite correct. Here (bottom) they actually show a formula for this. It is said that it takes about 250ms signal to get those room modes ringing. ![]()
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