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Old 23rd May 2013, 07:24 PM   #51
qusp is offline qusp  Australia
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but that doesnt take you any closer to the solution lol we all knew thats what you meant for the demands, we just didnt know why ... I still dont, very wierd way to go about it. there are more solutions for lower bandwidth multichannel networks for audio that high res.

so they actually want to play together live? good luck with that.
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Old 23rd May 2013, 07:36 PM   #52
Julf is offline Julf  Europe
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Right. They want to play live, we got that. What we don't get is the need for the silly HF modulation stuff - it sounds like they are trying to do an old-fashioned analog transmission system on top of a digital system, and that is just a bad idea.

Please, go back to your friend/brother/whatever, and ask what the musicians *really* want to do (the HF modulation stuff is part of the *how*, not the *what*), and we might be able to come up with a solution that is workable.
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Old 23rd May 2013, 07:37 PM   #53
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OK, I'll ask him and re-post back.
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Old 24th May 2013, 08:28 AM   #54
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Some news.

As much as I could understand out of it.

They want to be three Groups.

a. Group A and Group B will communicate with the 0 to 20KHz bandwidth (Pure audio).

b. Group A and Group C will communicate with the 45KHz to 65KHz bandwidth (via external upcoverter/downconverter boxes).

When Group A and Group B play together, Group B, will not able to hear what Group C plays and Group C ALSO will not be able to hear what Group B plays.
Group A will be the "center composer" which will hear both Group B and Group C.

So - I guess - There will be 2 musical compossitions at the SAME TIME with a center music of the Group A.

What can I say????....
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Old 24th May 2013, 09:15 AM   #55
Julf is offline Julf  Europe
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Quote:
Originally Posted by hipro5 View Post
Some news.
Unfortunately you need to go back to them and tell them that the 45 to 65 KHz part is not part of a requirement specification, but one suggested (but bad) attempt at a solution.

For their 3 groups they need:

- one (isolated) audio channel from group A to group B
- one (isolated) audio channel from group A to group C
- one (isolated) audio channel from group B to group A
- one (isolated) audio channel from group B to group A

Right? No need for any silly carrier frequencies.

Are they playing acoustic or electric instruments? Will they be using headphones or monitor speakers? If using acoustic instruments and/or voice, and monitor speakers, the real challenge will be preventing bleed from the monitor speakers of group A to the microphones leading to groups B and C.
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Old 24th May 2013, 11:17 AM   #56
DF96 is offline DF96  England
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I haven't seen anything in the spec which could not be satisfied using normal FM radio mike techniques (enhanced, if necessary, with cables and repeaters). Why does it have to be digital and FDM?
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Old 24th May 2013, 11:20 AM   #57
Julf is offline Julf  Europe
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Originally Posted by DF96 View Post
I haven't seen anything in the spec which could not be satisfied using normal FM radio mike techniques (enhanced, if necessary, with cables and repeaters). Why does it have to be digital and FDM?
The only reason would be to go long distances over the Internet, but then the latency and packet loss issues take on a completely different dimension...
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Old 24th May 2013, 12:03 PM   #58
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Oppppsssssssss......I found something simillar for our needs in NET.
THOUGH a LOT of $$$$$ involved.

FMC01 - FM MPX Codec*:: 2wcom - Audio & IP Sat Systems, FM/RDS Solutions, DVB-T Monitoring


http://www.2wcom.com/fileadmin/redak..._datasheet.pdf


Problem is that we want AT LEAST 65KHz.

How hard is it to be?
We don't want ALL these "funcy" things on.
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Old 24th May 2013, 12:24 PM   #59
Julf is offline Julf  Europe
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Quote:
Originally Posted by hipro5 View Post
Problem is that we want AT LEAST 65KHz.
Want, yes. Need, no. Have you read my 2 previous messages?
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Old 24th May 2013, 01:19 PM   #60
oshifis is offline oshifis  Hungary
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They probably have to use headphones. As per the spec, when group B plays and group A listens to it, the music of group B shouldn't be retransmitted to group C (and vice versa, C shouldn'n be retransmitted to B). This is impossible with using loudspeakers.
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