DSP Xover project (part 2)

Hi all...
I would be interested but have some questions, just to see if I get this right ...
sorry for bad english...

Now i have active 3 way loudspeakers and useing behringer dcx2496 as crossover

So with this project I could replace it and have better sound ?

I could use it as ;

Source > DSP Xover (which have onboard,6chanell, DAC and volume control) > amplifiers > drivers

Good day Yoke and thanks for your interest.

I never had a dcx in my hands and I have no precise idea about the sound it can make.

What I can tell you is that the current project can suit your needs as you have explained these. It can also allow you to expand your system if you wish at some point to connect more than 1 source or add subwoofers to your system.

Also, what's specific to this project is that it is DIY-friendly by nature and it's being developed with the idea in mind that the user will want at some stage to add his own touch (custom chassis, lcd, buttons, power supply, opamps, caps, custom filters, analogue volume, I2S etc) and explore his own interests.
 
Ok, so I did some Ebay surfing. Besides these parts I would need the powersupplies (think I already got those) and a cabinet :) .
Cool! :)

Could you provide a cad drawing of the connector side, .dxf or .dwg maybe ?
The CAD drawing will follow. Right now I'm into programming and I want to finish first a few things so the drawing will come a bit later.

Any of these small remotes should be fine and I got myself one to give it a try. The other option is to get a universal remote and share it with your sources (CD etc).
This one is not ideal because of how the buttons are placed in 2 rows.
It's going to be clear when I detail what each button does.
1- On/Off
2- Mute/Unmute
3- Enter Menu/Quit Menu
4- Set option in Menu/Balance when menu off
5/6- Up and down in menu/Volume up and down when menu off
7/8- Left and right in menu/Bass and Treble when menu off

So i would place buttons 5/6/7/8 on a diamond shape, with button 3 or 4 in the center and the other nearby, then place the remaining buttons (On/Off and Mute).

Yup no problem with that one. Note that you have on ebay various prizes (1602 Character LCD Display Module Blue Blacklight New | eBay), various colors, various sizes... They differ a bit in the placement of pixels and in terms of speed, but it's hard to know before testing. Anyway they are all fine.

Yeah that's an option. In fact you just need the sensor itself. I've tried various models from Vishay and one from Rohm, they are all good and available from Digikey or Farnell. The requirement is 5V 38kHz.
They have 3 pins: 5V, GND and signal. Beware that the pinning changes from one model to the other - even within the same manufacturer's product line.
 
I forgot another nice thing about the cs3318:

It does not like to have the analog rails up without the digital supply, it will burn...... Also keep in mind that the reset line must be kept low during powering up. I solved this with a powersupply supervisor ic, the MAX6301.

Been there, burnt 3 of them:eek:
 
Is their a possibility to run a second board in slave configuration (for the volume control)?

This way I could control my 3-way active system, and make use of the multi-sub approach or experiment with multi-channel...

That's possible: expansion ports have not only I2S but also I2C, SPI and GPIO.

I'm not sure however it's going to be necessary, ever. As such the board has 10 output channels. It can be easily expanded with 6 more outputs, which brings the count to 16 ;) Unless you need very CPU-intensive processing routines, the DSP should be powerful enough for 16 channels.

Will you ever want more than 16 output channels?
 
chaparK, will this work ;

can I use your DSP Xover - use 6 digital outputs ( I2S) - connect it to 8 channel DAC (as Buffalo DAC BIII, use only 6 of 8 ) - and then connect on BIII something like 3 x Pass D1 (as on other diyaudio tread) ?

will this be straight forward ?

(I presume that BIII would be beter sounding then on board DAC ? )
 
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yes

will this be straight forward ?
not sure if that phrase is appropriate =) the dac will be larger than most poweramps.

its similar, but less convoluted than what i'm planning but i'm using ackodacs. it will work, but your question

(I presume that BIII would be beter sounding then on board DAC ? )
:confused: I dont even know if chaparK has heard his own dac section properly yet and certainly hasnt heard what you propose, so he cant possibly give you a meaningful answer.

we can presume it will be better sounding if implemented well yes, but even if he had heard it it would be a matter of personal taste, just as my preference for ESS is
 
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Thanks qusp

Jea, I have read wholl tread, and I figure that chaparK can't answer about sound and DAC,and compare it with BIII...
As I understand, he will make this project on budget,affordable to most people, and leave place for those who will like to upgrade it...if thay feel the nead for it ;)

That's how I see it...:)

I will not polute this tread any more ;) ... will folow and ask some more questions once the project will be done ;)

Sorry for bad english,have no spell check on mobile ;)
 
That's possible: expansion ports have not only I2S but also I2C, SPI and GPIO.

I'm not sure however it's going to be necessary, ever. As such the board has 10 output channels. It can be easily expanded with 6 more outputs, which brings the count to 16 ;) Unless you need very CPU-intensive processing routines, the DSP should be powerful enough for 16 channels.

Will you ever want more than 16 output channels?

16 is indeed plenty. But the CS3318 can only control the volume of 8. So I would need to run another CS3318 in "slave", following the main chip.
 
can I use your DSP Xover - use 6 digital outputs ( I2S) - connect it to 8 channel DAC (as Buffalo DAC BIII, use only 6 of 8 ) - and then connect on BIII something like 3 x Pass D1 (as on other diyaudio tread) ?

will this be straight forward ?

(I presume that BIII would be beter sounding then on board DAC ? )

Hi Yoke,

Connection-wise that seems OK. Regarding how it's going to sound, I can't tell you more than what qusp already wrote.

I'm really looking forward to more info and pricing on this DSP. It sounds perfect for my multiple sub configuration to replace my DCX.

Cheers! :)

16 is indeed plenty. But the CS3318 can only control the volume of 8. So I would need to run another CS3318 in "slave", following the main chip.

Yes indeed, we'll need to think of how to expand volume control over 16 channels.