Hugh, I don't have a mic, but I have an SPL meter. Although the meter is cheap, I believe it has been calibrated.
I am able to plot the FR curve with test tones and a spreadsheet. I've got data with and without equaliser (obviously, I'm looking for a flat response with equaliser). By plotting the difference in db, I can see the actual effect of the equaliser. I will post graphs a bit later... At the moment I'm using the 9 band equaliser, and according to my measurements its effect follows nice diagonals between the 9 points. Good work :-) Except, one fly in the ointment is the bass area. The effect of the equaliser seems to be much less at lower frequencies. I have some pretty big troughs and peaks in a narrow band of frequencies in the bass, and the equaliser is not modifying the signal as dramatically as the equaliser settings are asking it to. (The real effect of the equaliser settings at higher frequencies seems to be much greater and certainly nearer to the settings.) So my questions are: 1. Is it possible to have a *setting* of more than +/- 12db for the equaliser, or is there a technical reason why the effect of the equaliser diminishes at low / narrow frequencies that makes this pointless? 2a. Would a room correction filter display the same type of behaviour as above? 2b. If not, do I need to do a frequency sweep with a mic, ADC etc? Or, is it possible to artificially create a WAV file from my existing measurements? Many thanks, Darren -- darrenyeats Monarchy CLD-M401 transport or SB3 -> Sony DAS-703ES DAC -> Krell KAV-300i -> PMC AB-1 (home-made room treatments and supports) ------------------------------------------------------------------------ darrenyeats's Profile: http://forums.slimdevices.com/member.php?userid=10799 View this thread: http://forums.slimdevices.com/showthread.php?t=26005 _______________________________________________ plugins mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/plugins
