Frequency Splitter Distortion?

gribelu · Oct 30, 2003, 07:43 PM

Hey
I'm trying to get a 4.1 setup with a 2.1 (cambridge soundworks digital) on the Digital DIN output of my sblive value and some shitty speakers on the analog rear out. BUT... i want to route the bass of the rear to the front speakers, wich have a subwoofer.
As you can see in the pic below, i'm using a Frequency Splitter on each of the rear channels, wich output the highs to the rear and the lows to the Stereo Mix, wich mixes that bass with the front channels... The only problem is that the sound that comes out of the Freq Splitters is distorted

... At high volume with the front satelite speakers disabled it's the most obvious.

DSP Setup

Could anyone please suggest something that would work better? ... best thing would be if i could output all the bass to the woofer through the LFE channel, but i don't think it's possible with my speakers.. or is it?

Any help will be greatly appreciated. Thanks in advance

Daniel Drummond · Oct 30, 2003, 08:09 PM

Insert a peak plugin right after the freq splitter and check if the level is too high. If it is, decrease the gain. Just and idea...

Daniel Drummond · Oct 30, 2003, 08:13 PM

Another idea: set your surrounder effect to 4.1 mode. Route front to front, rear to stereo mix and subwoofer to stereo mix. Stereo mix then goes to rear. Or remove the surrounder and do your connections straight from xrouting and see what you can achieve...

gribelu · Oct 30, 2003, 08:52 PM

Things is, that those rear speakers have UGLY low frequency output (up to about 150hz)... that's y i'm doing this... i only want medium and high frequencies on those, and the lows can only go to the front speakers, where the woofer is. If i simply check Bass Redirection in the Surrounder and mix it with the front channels, it's not good enough, because the front sattelite speakers do output some of the frequencies included in the 150hz... so that kills some of the stereo effect on the front channels, since the LFE channel is a mono channel... wich leads me to the Freq Splitter (or Lowpass...) again... and the slightly distorted sound problem...

Maybe i'm not understanding the purpose of Width slider? or something...

gribelu · Oct 30, 2003, 09:22 PM

i just finished testing all possible filters that have any chance of doing this, in theory. I used a Wave Generator and a Peak meter... unfortunately none of the filters simply 'split' the sound to output only the defined frequencies. Even the Surrounder, with Bass Redirection enabled, output higher frequencies to the woofer channel... the volume is lowered, but they're still going out... same problem with lowpass, freq splitter (heh, splitter) etc.

so...

... thatz how i feel right now

Daniel Drummond · Oct 30, 2003, 11:52 PM

Try using Max's parametric EQ (split the signal before it and run one with full bass and no highs and another with full highs and no bass)... Maybe that'll work...

gribelu · Oct 31, 2003, 12:49 AM

I thought about a chain of filters but i just don't have the GRPs to do it... it's a 10k1

I even thought about writting the dane source for the filter i need... i might just do that and maybe someone else will write the C++ code for it

Oct 30, 2003, 07:43 PM	#1
gribelu DriverHeaven Newbie Join Date: Dec 2002 Posts: 10 Rep Power: 0	Frequency Splitter Distortion? Hey I'm trying to get a 4.1 setup with a 2.1 (cambridge soundworks digital) on the Digital DIN output of my sblive value and some shitty speakers on the analog rear out. BUT... i want to route the bass of the rear to the front speakers, wich have a subwoofer. As you can see in the pic below, i'm using a Frequency Splitter on each of the rear channels, wich output the highs to the rear and the lows to the Stereo Mix, wich mixes that bass with the front channels... The only problem is that the sound that comes out of the Freq Splitters is distorted ... At high volume with the front satelite speakers disabled it's the most obvious. DSP Setup Could anyone please suggest something that would work better? ... best thing would be if i could output all the bass to the woofer through the LFE channel, but i don't think it's possible with my speakers.. or is it? Any help will be greatly appreciated. Thanks in advance

Oct 30, 2003, 08:09 PM	#2
Daniel Drummond DriverHeaven Senior Member Join Date: Dec 2002 Location: Brazil Posts: 1,137 Rep Power: 0	Insert a peak plugin right after the freq splitter and check if the level is too high. If it is, decrease the gain. Just and idea... __________________ www.palcomp3.com.br/ed

Oct 30, 2003, 08:13 PM	#3
Daniel Drummond DriverHeaven Senior Member Join Date: Dec 2002 Location: Brazil Posts: 1,137 Rep Power: 0	Another idea: set your surrounder effect to 4.1 mode. Route front to front, rear to stereo mix and subwoofer to stereo mix. Stereo mix then goes to rear. Or remove the surrounder and do your connections straight from xrouting and see what you can achieve... __________________ www.palcomp3.com.br/ed

Oct 30, 2003, 11:52 PM	#6
Daniel Drummond DriverHeaven Senior Member Join Date: Dec 2002 Location: Brazil Posts: 1,137 Rep Power: 0	Try using Max's parametric EQ (split the signal before it and run one with full bass and no highs and another with full highs and no bass)... Maybe that'll work... __________________ www.palcomp3.com.br/ed

Oct 30, 2003, 08:52 PM	Thread Starter #4
gribelu DriverHeaven Newbie Join Date: Dec 2002 Posts: 10 Rep Power: 0	Things is, that those rear speakers have UGLY low frequency output (up to about 150hz)... that's y i'm doing this... i only want medium and high frequencies on those, and the lows can only go to the front speakers, where the woofer is. If i simply check Bass Redirection in the Surrounder and mix it with the front channels, it's not good enough, because the front sattelite speakers do output some of the frequencies included in the 150hz... so that kills some of the stereo effect on the front channels, since the LFE channel is a mono channel... wich leads me to the Freq Splitter (or Lowpass...) again... and the slightly distorted sound problem... Maybe i'm not understanding the purpose of Width slider? or something...

Oct 30, 2003, 09:22 PM	Thread Starter #5
gribelu DriverHeaven Newbie Join Date: Dec 2002 Posts: 10 Rep Power: 0	i just finished testing all possible filters that have any chance of doing this, in theory. I used a Wave Generator and a Peak meter... unfortunately none of the filters simply 'split' the sound to output only the defined frequencies. Even the Surrounder, with Bass Redirection enabled, output higher frequencies to the woofer channel... the volume is lowered, but they're still going out... same problem with lowpass, freq splitter (heh, splitter) etc. so... ... thatz how i feel right now

Oct 31, 2003, 12:49 AM	Thread Starter #7
gribelu DriverHeaven Newbie Join Date: Dec 2002 Posts: 10 Rep Power: 0	I thought about a chain of filters but i just don't have the GRPs to do it... it's a 10k1 I even thought about writting the dane source for the filter i need... i might just do that and maybe someone else will write the C++ code for it