Excerpts from fons's message of 2010-09-30 00:11:32 +0200: > On Wed, Sep 29, 2010 at 11:33:37PM +0200, Philipp Ãberbacher wrote: > > > Wow, those dips are pretty deep.. about 25 dB.. > > In theory they'd go to minus infinity. What is worse is that they > are also quite wide at the -3dB points. Afaik, -3dB == cutoff frequency, at least with those passive electronic single pole low/highpass filters. So If I understand that and read the picture correctly, you refer to the frequency range between the cutoff of the low-band and the lower cutoff of the mid-band, which is about 300Hz, as well as the upper cutoff of the mid-band and the cutoff of the high-band, which looks even wider to me, about 400Hz. Those poor notes, if they fall into those holes they'll have a hard time coming out again :) I also wonder a bit why the 3kHz dip is at 3.1kHz.. > > Do I understand your hint correctly when I guess that if you invert the > > mid band and add it at the right level the whole thing would end up more > > or less flat? > > Just inverting it will produce a sum response that is more or less > flat. It will have bumps of a few dB instead of the deep dips, but > this can be corrected to some degree by adjusting the filter params. Just as I expected. Hurray for DSP by pictures :) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
