Instant Crossover Prototyping

[mazeroth]

Just posted this over at the driverhaven.net forums. Wondering if you guys could help me out?

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I have an Athlon 1.4ghz with a Sound Blaster Live! Value CT4670 that has NOTHING loaded on it besides Windows XP and the KX drivers. I want to use this computer 100% for active crossover duty for my speaker building hobby. I have the newest release, 3538-debug. In the bottom right side of my screen it says: CT4670 10k1 [d800]

I've read every thread I could and have fiddled with this awesome program for hours and can't seem to figure out how to use this for what I need to do. I would like it to function as a 24db/octave crossover for a set of 2-way speakers I'm building. I wouldn't mind using an equalizer with these to help tame them if they need it.

Can this be done with the old Sound Blaster I have or do I need the newer, 10k2 chip? If you could show me any tutorials on how to achieve something like this I would GREATLY appreciate it. Heck, I can't even figure out all the sound directing lines under the kX DSP window!

I'll keep searching and reading and I do GREATLY appreciate any information you can provide me!

Thanks!

[noisenyc]

this is looking good, i ordered a compatible card to get this fun going.

for you US guys J&R has the goods for 30 clams.

http://www.jr.com/JRProductPage.process?Product=2013347

not the hottest one but the price is right...

thanks for the tippage

[bzdang]

Hi Mazeroth, I wish to help you but I have been (and will be) very busy over the holidays. Can you search here in diyaudio for 'bzdang' posts, many of them pertain to kxproject and you may find the info that you require in some of them. I will also recommend that you download the 3537 version of the driver and the ufx plugin for 3537, as 3538 is under development and is unfinished. I don't know if the LR crossovers and parametric EQ are available for 3538 version yet.
Cheers, I will look in to this thread from time to time.

[morbo]

Just wanted to say thanks very much bzdang for bringing this to my attention. I went out and got a cheap Live card, and last night finally installed it and got the whole setup up and running. From start to finish it took maybe 1.5 hours to get a simple 2 way crossover going. This is great, it lets me get an idea for how the drivers interact and what slopes might work before I get down to the 'serious' passive XO design. Also, it will come in very handy for putting a subsonic filter on my new nearfield monitors which should make them virtually indestructible! Thanks again!

[Chris8sirhC]

Right now you can get a 2ghz+ computer at best buy for about $250 after mial in rebates. The only other thing you need is the sound card. Super cheap digital active crossover.

[bzdang]

Yes, for those of us who live in front of our computers, it is a great thing. Terrific for subwoofer filtering too, even if you have passive filters in the satellites.

[wigginjs]

Just got my 3-way active speaker hooked up to my Creative Audigy2 via my 3-channel BrianGT LM3886 gainclone amp. I'm hearing a pretty loud hiss on all three channels (out of the tweeter, mid, and bass drivers) and I've isolated it to the Audigy2 card. When I have a different input connected to the gainclone I don't hear it and even when I remove the input from the Audigy2 card I still hear it. I even tried the Audigy2 outputs on a different amplifier connected to different speakers and I still hear it. I don't have a problem with this kind of noise on my Hercules Fortissimo III card in the same PC. The noise (a sort of hiss/hum) is much stronger in the tweeter than the mid, and stronger in the mid than the bass. It also seems unaffected by the "gain" controls in the KX DSP. I'm wondering if anyone else has run into this kind of noise coming from one of the creative cards, could this possibly be caused by a mis-configuration of the KX Project drivers? Help! =)

[bzdang]

I'll try to help. Can you post or send me screenshots showing your DSP window and the first four configuration panels of the kxmixer?
[master, ins/outs, recording, and AC97]

[wigginjs]

Here they are, thanks a bunch for your continued help =).


Pic 1
Pic 2
Pic 3
Pic 4 Pic 5

They seem to be messed up, I've got to run right now but I'll fix them later.

[bzdang]

I can see that you've used the 'prolog' object to get audio into the DSP, try replacing it with 'Src' from the ProFX group, double-click it and select FXBus 0/1 from the available choices.

Then replace the output object [I can't see which one you're using but it's probably epilog] with 'k2lt' from the ProFX group, it has a dialog box to assign physical outputs to pairs of its 'terminals'.

Then go into kxmixer and mute all of the AC97 stuff.

How are you controlling volume of your system? I crank the volume in the kxmixer and in any playback software, and then adjust input pots on my amplifiers to set a desired maximum level. This is better for signal to noise ratio than running the amps wide open with lower soundcard output level, also is much easier on the ears if you have an 'accident'.