ognam2 said:Very interesting Project!
Are there already finishes units? Maybe some Pictures?
Which boards to I need to do A 8x ADAT AD/DA Box, and where can I get them?
Thanx Jonas
baadc0de said:I am slowly working on a way to interface these to the computer via a cheap and simple ethernet cable
smallbutfine said:Well, Rob, the devil is in the details. Developing such an interfacing is easily a commercial grade project. As far as I know he worked on the ASIO part of a driver and managed to transport raw audio over LAN interface between computers...
Me myself started a KS/WDM pc driver and managed to get a 24bit/96khz configurable dummy driver working up to the interface of a network device driver where i got stuck and hold on to make myself clear about the converters side of things....
SIXTYNINER said:bump
mhelin said:Is it OK to use CAT-5e cable for connecting the AD/DA modules using I2S directly to a PCI soundcard
mhelin said:(using some transmitter/receiver chips and transformers)?
joe333 said:Dynaudio, Tannoy and tc electronics are not using dig audio over cat5 cable in their surround systems?
guitarguy12387 said:I want to buy some I2S to ADAT boards. So when wiring these boards, do we tie two of the outputs of the ADC boards in parallel? That is, is there just one main I2S bus that we use? Or will an I2S to ADAT board have multiple inputs for I2S?
guitarguy12387 said:I am asking because i want to know how many I2S to adat boards i need for 4 of these boards (16 channels).
rob_gould said:baadc0de said:I am slowly working on a way to interface these to the computer via a cheap and simple ethernet cable
Hey baadc0de,
Just wondering if you had made any further progress on this interface? You seemed to really be going full steam ahead for a while.
Any news?!
Cheers,
Rob
baadc0de said:-- i haven't decided on a FPGA to use for this project yet and am unsure how exactly to design an interface "card" that would host it. Help would be duly appreciated.
baadc0de said:-- I'm looking for a gigabit PHY/MAC to go with this FPGA, integrating it might be painful. There's an opencore that I could use for aid, however: http://opencores.org/project,ethernet_tri_mode
baadc0de said:Hi Rob (and everyone else!)
Yes, I've been working on an ASIO driver using libpcap and FPGA sw/hw that would integrate with rkn80's A/Ds and D/As. I've hesitated about maybe opening another thread for this, but since there's not much to write about, I hope it's appropriate to update you all on the current status here:
sw/driver:
-- can transmit/receive audio using raw audio over ethernet between computers. It has its bugs, but as a proof of concept it works well enough (reliably)
-- This isn't using i2s, it's a simple custom protocol, though I might end up buying specs for AES51, AES47 and AES3 and implement those
-- it works only with ASIO hosts for now, and I have a hard time deciding if I want to go WDM/KS/WaveRT or keep it ASIO only. Don't ask about Mac/Linux yet, please, I'd like to make it work on a WinPC
hw/fpga:
-- i haven't decided on a FPGA to use for this project yet and am unsure how exactly to design an interface "card" that would host it. Help would be duly appreciated.
-- I'm looking at http://www.farnell.com/datasheets/33325.pdf currently, the FPGA itself is cheap enough as is this board
-- I'm looking for a gigabit PHY/MAC to go with this FPGA, integrating it might be painful. There's an opencore that I could use for aid, however: http://opencores.org/project,ethernet_tri_mode
-- something like a 300Mhz core might be able to pull off 64 channels at 96k/24-bit
The general theory is for the FPGA interface card to reside in a box together with the D/A, A/D cards and whatever clocking arrangement you would have and provide you with a gigabit ethernet port that you can connect to a switch or directly to a PC. You would configure the driver with a configuration tool (number of channels, sample rates, ethernet port you connected to, MAC address) and then "It Should Work" with your favourite multitrack recording software
If I decide to go the WDM/KS route, it would work with regular applications and games, too.
EDIT: about the (short/long)hand future tasks:
-- make sure the FPGA development board is a good enough one to develop and test on, then buy it
-- select a MAC/PHY chip and design/buy eval circuitry that will get FPGA data to the PC
-- verify that the FPGA<->PC roundtrip works via ethernet MAC/PHY
-- work on the FPGA sw to support a fixed, 2ch input board
-- build and test the A/D input board with FPGA hw
-- connect these and verify that 2ch of audio can be extracted from the A/D [milestone]
-- work on the FPGA sw to support output cards (D/A) and multiple inputs/outputs
-- design the real interface card with the FPGA and MAC/PHY on it
-- ... other nice features
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