inguz;205126 Wrote: > Graphs for low frequency response depend very heavily on the length of > the impulse response measurement, or the length of the FFT window used > to analyze it. The difference in your red and green chart lines is > probably just that REQW used a shorter measurement window.
You are correct sir! REQW uses a much shorter impulse sweep than Inguz, but why would that shift the frequency peaks and nulls values compared to Inguz? In particular look at the huge null at ~60Hz vs. ~80Hz. I don't understand that part. inguz;205126 Wrote: > Aha! REQW does third-octave smoothing of course. It doesn't import the > file format I use for impulse responses, though (64-bit-float, stereo > WAV). So I saved the impulse response as 16-bit WAV first. My brain must not be working this morning. I know you're trying to show me something here, but what I think I'm seeing just looks like two slightly different versions of the REQW sweep. inguz;205126 Wrote: > But we can see measured impulse responses with objectively large > defects, and yet they "sound good" in some way, and correcting for > those defects (in this case by flattening the frequency response and > adjusting the early part of the time/phase response to be closer to > ideal) makes it "sound worse" in some ways. Weird. I wonder if this has something to do with the type of speaker I have. As it seems you looked at the website you can see that mine are not direct radiators. Nor are they "omnidirectional" like the classic Ohm Walsh designs; their design is meant to approximate a point source - albeit in a way that is a bit more complex than the typical omni. I wonder if, because of this, taking a response measurement across many points would be more in line with getting a real assessment of the response characteristics, more so than a direct firing speaker. I'll give your suggestion a try! It looks like it's going to rain here today, so I have a ready made excuse to stay in! -- tonyptony ------------------------------------------------------------------------ tonyptony's Profile: http://forums.slimdevices.com/member.php?userid=3397 View this thread: http://forums.slimdevices.com/showthread.php?t=35615 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
