Volume control at the speaker?

[Don Bowey]

That's the raw data rate only !

Now you have to add overhead for the frequency hopping stuff, handshaking,
whatever
and redundancy for lost packets - and I've no idea how the data's encapsulated
-
there'll doubtless be extra stuff there too. I'm not calculating this myself,
I have
it on good authority from some guys who are developing the product. I was
quite
surprised how much overhead is required myself actually.

You've provided other BS swearing about the correctness of it and have been
wrong. Your credibility slipped before this and stating 6 Mbit/s here
confirms you don't know Jack.

 

[Pooh Bear]

You don't have to use TCP/IP, and you don't need, or even want, lost
packet redundancy, at least not for streaming audio. If you need a
protocol at all, use something like UUCP.

If you don't account for lost packets what's going to happen to any lost audio data ? I'll
ask some more next time I talk to the guys about the protocol they're using.

Graham

 

[Pooh Bear]

Even accepting your numbers, a 10 Mbps link is adequate. So it's not
necessary to resort to MP3.

10Mbps would indeed be fine if the link could grab most of the relevant bandwidth.

Existing 2.4G audiolinks are mostly 'mp3' like. Look for the term 'sub band codec' in the
description - although many are simply sold using the confusing and meaningless term
'stereo quality' !

I note that Jim Thompson commented on a analogue FM based 2.4G audio link too.

Graham

 

[Ken Taylor]

If you don't account for lost packets what's going to happen to any lost
audio data ? I'll
ask some more next time I talk to the guys about the protocol they're
using.

Graham

You get a 'pfsst' noise (that may lose something in translation) until
everything sync's up again. Audio streaming isn't generally critical stuff
so why bother trying to make up the lost stuff.

Ken

 

[tony sayer]

Indeed and I agree 100%. At some time in the future decent quality wireless
links will become available using the 2.4GHz band using a method compatible with
IEC 802.11. I'm actually waiting for a certain company to announce its
commercial availability. Last time I checked it was being held up for ETSI
compliance issues.

Graham

Www.barix.com

any use?......

 

[CJT]

If you don't account for lost packets what's going to happen to any lost audio data ? I'll
ask some more next time I talk to the guys about the protocol they're using.

Graham

Once their time has passed, they're irrelevant.

 

[Tim Martin]

Existing 2.4G audiolinks are mostly 'mp3' like. Look for the term 'sub band codec' in the
description - although many are simply sold using the confusing and meaningless term
'stereo quality' !

Well, I use a wireless link for my Netgear MP101, and it handles .wav files.

I see it says on the box that the MP101 uses 802.11g, which uses the 2.4GHz
technology, and speeds are "up to 54Mbps" (yea, right ...).

Tim

..

 

[Pooh Bear]

You get a 'pfsst' noise (that may lose something in translation) until
everything sync's up again. Audio streaming isn't generally critical stuff
so why bother trying to make up the lost stuff.

That's what I thought.

That makes such a scheme unacceptable for serious hi-fi or professional audio
usage which will be the mainstay of the market for such a product.

Ergo... redundancy *is* required.

Graham

 

[Pooh Bear]

Once their time has passed, they're irrelevant.

Which is why you have a receive buffer and there's latency between transmission and reception.

Graham

 

[Pooh Bear]

Well, I use a wireless link for my Netgear MP101, and it handles .wav files.

I see it says on the box that the MP101 uses 802.11g, which uses the 2.4GHz
technology, and speeds are "up to 54Mbps" (yea, right ...).

Product Specifications
• Digital Audio File Formats:
- MP3 up to 320 Kbps or variable bit rate (VBR)
- WMA 8/9 to 192 Kbps
- Internet Radio (streaming MP3)

http://www.netgear.com/pdf_docs/MP101_ds_NA_30Nov04.pdf

Trust me - uncompressed digital audio wireless links are not yet available. I
expect the MP101 compresses wav files on the fly.

Graham

 

[Pooh Bear]

You've provided other BS swearing about the correctness of it and have been
wrong. Your credibility slipped before this and stating 6 Mbit/s here
confirms you don't know Jack.

So, if I was to point you to a company that's actually working on uncompressed
digital audio links and they confirmed what I said, would you apologise for your
stupid comment above ?

It appears that *YOU* are the one who 'knows jack' since you're basically talking
straight out of your arse. I suggest you go learn something about the technology.

Graham

 

[Pooh Bear]

Www.barix.com

any use?......

Last time I looked anythting they had was compressed.

I've been round the loop several times over a year ago and all the consumer stuff is
the same. They talk of 'high quality' or 'stereo quality' but never ever mention
it's not linear pcm.

Graham

 

[Pooh Bear]

Www.barix.com

any use?......

Nought's changed !

With Barix you can bring your audio into the network. The Barix Instreamer or MP3
encoder is an intelligent streaming component that converts analog and digital audio
into MP3 which it then transmits into the network.

http://www.barix.com/index.php?option=com_content&task=view&id=52&Itemid=153

Graham

 

[Don Bowey]

So, if I was to point you to a company that's actually working on uncompressed
digital audio links and they confirmed what I said, would you apologise for
your
stupid comment above ?

It appears that *YOU* are the one who 'knows jack' since you're basically
talking
straight out of your arse. I suggest you go learn something about the
technology.

I don't care a whole lot about what *one* company is *working on*. How
about you point me to an *ANSI* Standard, or even one in progress in a
Working Group?

Oh..... I remember, you like to make reference to "standards" that aren't
really Standards.

IMHO you aren't trustworthy in discussions.

 

[CJT]

Which is why you have a receive buffer and there's latency between transmission and reception.

Graham

Unless you buffer the whole session (e.g. a complete song, or perhaps
even a complete CD), there's always the possibility of a buffer not
arriving in time.

 

[CJT]

So, if I was to point you to a company that's actually working on uncompressed
digital audio links and they confirmed what I said, would you apologise for your
stupid comment above ?

It appears that *YOU* are the one who 'knows jack' since you're basically talking
straight out of your arse. I suggest you go learn something about the technology.

Graham

The Turtle Beach Audiotron does .wav, and if you wanted to, you could
link to it via wireless.

 

[Rob]

Tim Martin wrote:




Product Specifications
• Digital Audio File Formats:
- MP3 up to 320 Kbps or variable bit rate (VBR)
- WMA 8/9 to 192 Kbps
- Internet Radio (streaming MP3)

http://www.netgear.com/pdf_docs/MP101_ds_NA_30Nov04.pdf

Trust me - uncompressed digital audio wireless links are not yet available. I
expect the MP101 compresses wav files on the fly.

Graham

Mmm - definitely don't follow you here. My (any) 'g' wireless link has a
real world 2 megabyte per second transfer speed. There is simply no need
for audio compression, and I can see no sign of it happening on either
of the machines in the network. The same with video I'd guess - an
uncompressed avi file will stream in it's native format.

The Netgear is essentially a mini puter capped by its ability to process
compressed audio. It could happily stream uncompressed audio, subject
only to bandwidth.

Rob

 

[Mark]

FM radio transmitter

Receiver in each room,

Mark

 

[tony sayer]

Product Specifications
• Digital Audio File Formats:
- MP3 up to 320 Kbps or variable bit rate (VBR)
- WMA 8/9 to 192 Kbps
- Internet Radio (streaming MP3)

http://www.netgear.com/pdf_docs/MP101_ds_NA_30Nov04.pdf

Trust me - uncompressed digital audio wireless links are not yet available. I
expect the MP101 compresses wav files on the fly.

Graham

They are, but not as you might know, or want to pay for them)

 

[tony sayer]

Last time I looked anythting they had was compressed.

I've been round the loop several times over a year ago and all the consumer
stuff is
the same. They talk of 'high quality' or 'stereo quality' but never ever
mention
it's not linear pcm.

Graham

Apparently so they say, one of their OEM modules does cope with this.
I'll find out before long as we're installing a 3 mile 5 Ghz link that
needs to carry real time PCM....