AES42 wireless lav mic

B

Bruce Watson

Veteran
Is there such a thing as an AES42 wireless mic? With all the RF interference out there, a digital mic throwing a digital stream (with some form of error detection and correction) might be just the ticket. It would be really nice if the DSLRs could take AES42 digital inputs and thus rid us of the dreadful mic preamps typical of these cameras.

So which comes first -- the digital mic, or the digital recorder in the camera?
 
Many of the higher-end systems are digital, trans. to recv. But still not immune to interference. A digital out on the reciever would not help the interference issues any. (and a $20 cable would still sound better)
 
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Bruce Watson said:
Is there such a thing as an AES42 wireless mic? With all the RF interference out there, a digital mic throwing a digital stream (with some form of error detection and correction) might be just the ticket. It would be really nice if the DSLRs could take AES42 digital inputs and thus rid us of the dreadful mic preamps typical of these cameras.

So which comes first -- the digital mic, or the digital recorder in the camera?
Click to expand...

You are correct in saying that an AES42 mic. is pretty immune to all the RF interference and hash and the extra noise of analogue systems.

But the only way to get an AES42 tie mic. is to get the Sennheiser MZD 8000 and the special Sennheiser adaptor cable that terminates with a 3-pin XLR.

You then connect this to a tie mic. that has an XLR and takes in 48V phantom power.

You would also have to plug this into an AETA 4MinX or SD 788T (the only recorders that take AES42 as standard), or use a Neumann or Schoeps connection kit.

I hope this helps.

(oh - and I have been recording with AES42 digital mics since 2006 and have also written a couple of AES papers on digital mics., so I *do* know them).


John
 
John Willett said:
You are correct in saying that an AES42 mic. is pretty immune to all the RF interference and hash and the extra noise of analogue systems.
Click to expand...

I guess I'm just thinking that sending a packetized digital stream from body pack transmitter to on (or near) camera receiver would provide some interesting advantages. Like adding some ECC to the packet. This would let the receiver detect errors. Some of them it could fix; bigger errors it could just replicate the last packet, which would be a whole lot less annoying than the big "splat" from EMI that we get today.

It would also be possible to make it two-way communication (so both body pack transmitter and receiver become two-way radios; probably too expensive even if you could use two of the same device on either end, instead of having two completely separate devices as we do today). That would enable some level of "I didn't get packet 2769, please resend", within the limits of buffers and time lags that turn out to be acceptable. Maybe if that's not already covered in the AES42 2010 standard, it could be in a future one. IDK.

In any case, I want this in my next generation Sennheiser Evolution G4 100 series. I know, I know, good luck with that. Still, if we don't ask for it, we won't get it, yes? Is Sennheiser working on anything like this?
 
Bruce Watson said:
I guess I'm just thinking that sending a packetized digital stream from body pack transmitter to on (or near) camera receiver would provide some interesting advantages. Like adding some ECC to the packet. This would let the receiver detect errors. Some of them it could fix; bigger errors it could just replicate the last packet, which would be a whole lot less annoying than the big "splat" from EMI that we get today.

It would also be possible to make it two-way communication (so both body pack transmitter and receiver become two-way radios; probably too expensive even if you could use two of the same device on either end, instead of having two completely separate devices as we do today). That would enable some level of "I didn't get packet 2769, please resend", within the limits of buffers and time lags that turn out to be acceptable. Maybe if that's not already covered in the AES42 2010 standard, it could be in a future one. IDK.

In any case, I want this in my next generation Sennheiser Evolution G4 100 series. I know, I know, good luck with that. Still, if we don't ask for it, we won't get it, yes? Is Sennheiser working on anything like this?
Click to expand...

Firstly - AES42 is for wired microphones, not wireless.

Secondly - Sennheiser already has a digital wireless system - 9000 series - the transmitters are around £2,000 each and the receiver starts at about £20,000 for a single channel and about £1,600 for each additional channel (up to 8) +VAT.

And there is no camera receiver yet.

G4 is very unlikely to be digital.
 
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