Andy Peters

Re: Modular multi channel DIY AD/DA Box
« Reply #600 on: August 20, 2012, 02:21:37 AM »
http://nwavguy.blogspot.com.au/2012/04/odac-released.html 
"Extremely tiny 0603 ..."
"fine-pitch 48-pin IC ..."

oooooOhhhhh SCARY!!!!

OK, I've stopped laughing.
Wanna post test results for your DAC or ADC?  RMAA will do if you can post a little extra data to determine where is FS.

That's not my point.  ::)

-a
"On the Internet, nobody can hear you mix a band"


deuce42

Re: Modular multi channel DIY AD/DA Box
« Reply #601 on: January 20, 2013, 03:08:09 AM »
Is this project still alive?

rkn80

Re: Modular multi channel DIY AD/DA Box
« Reply #602 on: January 31, 2013, 06:31:56 PM »
It smells dead...

But no it is still alive. Due to some circumstances there was not much time to do something on it. That has changed now. In a few weeks I'll get back my ADAT stuff that I borrowed a friend. Then I can test the final ADAT interface of the project.
The ADAT interface will provide these features:
- up to 4 input ADAT streams (lightpipe) => up to 32 input channels
- up to 4 output ADAT streams (lightpipe) => up to 32 output channels
- wordclock input
- wordclock output
- lock either to external wordclock or one of the ADAT input streams

Looking forward...

R.

bremusound

Re: Modular multi channel DIY AD/DA Box
« Reply #603 on: January 31, 2013, 06:41:34 PM »
GREAT!!!  :)

 

Re: Modular multi channel DIY AD/DA Box
« Reply #604 on: February 02, 2013, 06:30:16 AM »
There was talk as well of a dac with pcm1794a
Any news on that? A similar adc would be awesome as well.
This is a really cool project. Keep it alive.

Re: Modular multi channel DIY AD/DA Box
« Reply #605 on: February 02, 2013, 06:32:24 AM »
Hats off to raphael. No one has ventured on anything as good as this
Exciting stuff

rkn80

Re: Modular multi channel DIY AD/DA Box
« Reply #606 on: February 02, 2013, 06:53:39 AM »
There was talk as well of a dac with pcm1794a
Any news on that? A similar adc would be awesome as well.
This is a really cool project. Keep it alive.

Yes I remember that. I'm not sure yet where to go there. There is another DAC having better spec's then the 1794 but you loose then the option to do a low-cost version with the same PCB design. Anyway, nothing decided yet.
Let me first get the ADAT io working.

R.

rkn80

Re: Modular multi channel DIY AD/DA Box
« Reply #607 on: April 05, 2013, 08:24:23 AM »
HI,

last weekend I was talking with a friend about this project and showed him, what I already have. And he asked, why do you not use the ADAT io board as a mainboard. You only need to extend the pcb space and add some connectors and perhaps put a power supply on that board, too. Finally you could add some routing options for the i2s signals through a fpga but that's not mandatory because it makes it complicate again.

What do you think about that? Of course it would make many things easier...

R.

fret

Re: Modular multi channel DIY AD/DA Box
« Reply #608 on: April 11, 2013, 09:34:50 PM »
How hard would it be to interface 1 each of the ADC and DAC boards from this thread with a Raspberry Pi? The Pi has a bunch of general purpose IO pins with I2C and SPI:
https://www.modmypi.com/blog/raspberry-pi-gpio-cheat-sheet

I want to make a looper with the Pi using the same chassis as my MC1 foot controller. But it needs good quality audio i/o (very low latency obviously), and at least 3 input channels (stereo instrument mix and a "drummer" mic input).

Andy Peters

Re: Modular multi channel DIY AD/DA Box
« Reply #609 on: April 12, 2013, 04:59:13 PM »
How hard would it be to interface 1 each of the ADC and DAC boards from this thread with a Raspberry Pi? The Pi has a bunch of general purpose IO pins with I2C and SPI:
https://www.modmypi.com/blog/raspberry-pi-gpio-cheat-sheet

I want to make a looper with the Pi using the same chassis as my MC1 foot controller. But it needs good quality audio i/o (very low latency obviously), and at least 3 input channels (stereo instrument mix and a "drummer" mic input).

The Raspberry Pi speaks neither I2S nor ADAT, so without jumping through major hoops it's not likely you can do this.

-a
"On the Internet, nobody can hear you mix a band"


guitarguy12387

Re: Modular multi channel DIY AD/DA Box
« Reply #610 on: April 12, 2013, 05:12:19 PM »
There actually is an i2s interface. I think some people got it working-ish.

http://www.raspberrypi.org/phpBB3/viewtopic.php?t=8496

Andy Peters

Re: Modular multi channel DIY AD/DA Box
« Reply #611 on: April 12, 2013, 05:15:33 PM »
There actually is an i2s interface. I think some people got it working-ish.

http://www.raspberrypi.org/phpBB3/viewtopic.php?t=8496

Oh, the cheat sheet mentioned nothing about it so that's what I based my answer on.

-a
"On the Internet, nobody can hear you mix a band"

guitarguy12387

Re: Modular multi channel DIY AD/DA Box
« Reply #612 on: April 12, 2013, 05:17:35 PM »
Yeah, some of the pins pull double duty so with some configuration you can get it to work. The raspberry pi wiki isn't terribly robust  :)

rkn80

Re: Modular multi channel DIY AD/DA Box
« Reply #613 on: June 02, 2013, 09:28:19 AM »
Too bad, the mainboard is actually to big. I can not find a PCB pooling service that cna make the prototype for a good price if they can make the size at all...  :'(
Let's see how to solve it.

fenchelteefee

Re: Modular multi channel DIY AD/DA Box
« Reply #614 on: June 02, 2013, 12:36:00 PM »
What about the real-PCB.com guys? They seem to be quite communicative and had made already some boards for other forum members?


jdbakker

Re: Modular multi channel DIY AD/DA Box
« Reply #615 on: June 03, 2013, 04:32:41 AM »
Too bad, the mainboard is actually to big. I can not find a PCB pooling service that cna make the prototype for a good price if they can make the size at all...  :'(

http://www.goldphoenixpcb.com/singlepage.php?tg=specialprice

JDB.
[worked well enough for me in the past]

mrclunk

Re: Modular multi channel DIY AD/DA Box
« Reply #616 on: June 25, 2013, 02:39:25 PM »
Hi,
a little late to the party on this one but...

With this project would it be possible to build an 8 channel AES/EBU to ADAT converter?

Need to get the AES outputs of a Yamaha AD8hr (http://www.yamahaproaudio.com/global/en/products/interfaces/ad8hr/specifications.jsp)

Into my RME Multiface 1, ADAT inputs.

I don't really need all the features of a Mutec or RME ADI4.

Edit..
Just spotted this.
http://electronics.dantimax.dk/Kits/Digital_audio/index.html
 I2s in - ADAT out.
So i could use 2 of the AES/EBU input boards. (are they still availiable?)
44 or 48kHz only.
Job done?
Be nice to have Smux 96kHz tho..
« Last Edit: June 25, 2013, 04:37:13 PM by mrclunk »

rkn80

Re: Modular multi channel DIY AD/DA Box
« Reply #617 on: July 05, 2013, 11:07:05 AM »
Hi,

well you can do it as you described. But please not the wavefront chips do not support I2S and their BCLK definition is different. You have to introduce an inverter.

Sorry there are currently no AES boards available anymore. Maybe in the future there will be a new run...

R.

whiskeynipple0088

Re: Modular multi channel DIY AD/DA Box
« Reply #618 on: September 11, 2013, 01:44:50 PM »
So is this it for a DIY A/D converter
http://electronics.dantimax.dk/Kits/Digital_audio/index.html

nearly every DIY interface thread I read doesn't happen

I am extremely interested in a diy interface as I am tired of spending thousands on equipment that only lasts 4yrs. - at this point Im seriously considering going back to analog

thanks to all who have attempted and helped on this topic - its been on our heads for nearly 10yrs according to threads but seems were not that much closer - - please tell me Im blind and we have accomplished this.

(EDIT) - YES - it is still alive - ...... in the post that was directly under this one: http://www.groupdiy.com/index.php?topic=53080.0
« Last Edit: September 11, 2013, 02:15:06 PM by whiskeynipple0088 »

iampoor1

Re: Modular multi channel DIY AD/DA Box
« Reply #619 on: December 26, 2013, 10:00:41 PM »
Any updates? Id like to build a 24in 32out converter for interfacing with a mixing console soon.  8)


 

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