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Old 27th January 2006, 09:00 AM   #1
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Default MADI Transmitter

Does anybody know about transmitter/receiver chips for digital audio using the MADI protocol? Im wondering if chips like this do exist at all.
Any information is appreciated.

Thx in advance
illusionxx
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Old 29th January 2006, 10:37 AM   #2
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Anyone?
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Old 29th January 2006, 12:48 PM   #3
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With the demise of the AMD TAXI chips and the rise of programmable logic, such chipsets have been rare, assuming they still exist at all. Most manufacturers just use a FPGA. Its much cheaper and considerably more flexible.
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Old 29th January 2006, 01:05 PM   #4
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Quote:
Originally posted by illusionxx
Anyone?
Last year I had my head inside a few of the Euphonix 24 ch AD / DA
racks which all had MADI. Unfortunately we were not interested in
that aspect of the converters and didn't pay any attention to what
was driving the OP's or receiving the IP's.

My -guess- is there are no chips specifically for this application
as there are AES/SPDIF... that's just a guess.

There -may- be some info in this paper.

http://www.aes.org/e-lib/browse.cfm?elib=5340

Why do I get the feeling John Westlake might know something
about this.

Sorry can't be of any more help. I'd be interested if you do turn
something up.

Cheers,

Terry
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Old 29th January 2006, 07:48 PM   #5
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Thx for your answers. Looks like i will have to use a FPGA, too. Flexibility is an good argument although i`m not eager to lern VHDL.
I will report should i come across any interesting chip.

Terry you don`t have the mentioned paper to share?

illusionxx
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Old 30th January 2006, 12:36 AM   #6
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Quote:
Originally posted by illusionxx
Thx for your answers. Looks like i will have to use a FPGA, too. Flexibility is an good argument although i`m not eager to lern VHDL.
I will report should i come across any interesting chip.

Terry you don`t have the mentioned paper to share?

illusionxx
Sorry, no, I would have offered it if I did.

Just out of interest, what is your application?

Cheers,

Terry
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Old 30th January 2006, 08:22 AM   #7
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A company asked me to develop a digital multicore for them. This would be my diploma thesis project so i`m evaluating it`s severity.

illusionxx
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Old 30th January 2006, 12:01 PM   #8
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Quote:
Originally posted by illusionxx
A company asked me to develop a digital multicore for them. This would be my diploma thesis project so i`m evaluating it`s severity.

illusionxx
Have you looked at Gibsons Magic? This is a similar idea but it
looks like having some weight behind it. Cirrus has announced
they are developing compatible chips for it.

http://www.gibson.com/Products/Audio/MaGIC%20%282%29/

http://www.cirrus.com/en/press/releases/P470.html

Cheers,

Terry
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Old 30th January 2006, 09:18 PM   #9
hwb is offline hwb  Germany
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With SonyOxford's SuperMAC, which has recently been standardised by the AES as AES50, there's already a successor of MADI, so it doesn't really make sense to develop a multicore system based on this rather outdated standard.

The future of digital multicore systems will be Ethernet, but with thousands of vendor-specific protocols.

@illusionxx, you have PM
Holger
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Old 31st January 2006, 04:51 PM   #10
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Terry,

thx for the links but i can`t wait until the cirrus chips are available.


Holger,

the AES50 standard sounds promising, but i haven`t red their paper regarding this toppic yet. Maybe i`ll have the time to read it this evening.

If it makes sense to develop a multicore on MADI basis depends on the functionality expected from the device. AES50 features 32 channels in both direction while AES10 offers 64 channels in one direction. If the extended network capabilities of AES50 are not required MADI will suffice. On the other hand why bother about MADI transmission hardwear if 64 channels are not needed and AES50 uses ethernet`s physical layer.
The third possibility would be to develop my own transmission protocol adapted to the needs of my specific multicore system.

illusionxx
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