On Wed, September 7, 2016 11:06 am, bricolodu wrote: > By the way according to the box my 2" speaker is in, without any settings, > I can go down to less than 60 Hz ! But then, the size of the box is too big, > around 5L and I want 0.5L ! 60 Hz is not so bad, so maybe two different settings for the 5l box and the 0.5l box. > /I think that trick works best when the speaker system can get down to > within one octave of full bass response, so down to below 80Hz for sure, / > It is the case with the 5L box, I can even listen to 30 Hz although > attenuated ! What you are trying should work OK with the 5l box. I'm not sure about the 0.5 l box, that will depend on the low frequency cutoff for that system, which > /You may also need something like a speaker crossover, where > only frequencies below the bass cutoff of the speaker system are sent to > the distortion circuit,/ > This is what I'm doing, a low pass that cuts everything above 200 Hz > first. Too high, if the box can output to 60Hz, then the cutoff should probably be around 60Hz to 80Hz (see what sounds best). The idea is to fool the ear into hearing what is not produced, with the low pass at 200Hz then you would add extra harmonics to frequencies which are being produced by the speaker already, that will likely make the sound "muddy" or "thick," maybe you would use some other word to describe, but probably will not be the sound you want. > /then the output of that goes through a high pass to get rid of the low > frequencies which cannot be reproduced by the speaker, / Why ? To lower > distortion ? Yes, my assumption is that if the speaker cannot make audible output at those low frequencies, if you send the low frequencies anyway it will add distortion. Since that is what you are trying to do with the plugin, obviously the speaker does not add distortion in a way that you find sounds good, so best to avoid it. > What cut-off Frequency ? The lowest frequency where the speaker has full output. I think by the way you described the 5l box that would probably be around 50Hz or 60Hz (since you said 30Hz is very attenuated definitely above that). > It will be very limited if I use the > 0.5L box, the natural cutoff frequency of the box is around 150 Hz. That is probably around the limit where this technique could work. Even 150Hz is a bit high, 100Hz or 80Hz would be better. > /and the harmonics added back in to the original source to create the > illusion. / > This is what I'm doing. OK, you may be in the right direction, just off in the settings. Try lowering the high pass to 100Hz or lower, let the speaker play what it can play naturally, and only add in harmonics for frequencies the speaker cannot play naturally. The speaker can play 100Hz to 200Hz no problem, so don't make changes there. I do not know the answer to which plugin would work best to generate the harmonics. Perhaps someone can suggest a plugin more suitable, but you can start by experimenting with the changes to the filter frequencies. -- Chris Caudle _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
