Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-16 Thread stop-spinning

Hmmm - I am trying to work out a solution that will allow me to stream
music files from my PC upstairs over wireless and preferably without
loss of audio quality - the SB Touch in terms of size and convenience
would have fit the bill nicely.

However, what about the new NAD DAC-1, that looks interesting and is
geared up for high quality uncompressed wireless streaming. Whereas it
does have a DAC incorporated I will probably use it as a bridge to my
own DAC because it has SPDIF out.


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-16 Thread Soulkeeper

Somebody ought to set up a feature comparison table between the Touch
and various other streamers like the NAD. Wouldn't the wiki be perfect
for that?


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-16 Thread garym

stop-spinning;696100 Wrote: 
 Hmmm - I am trying to work out a solution that will allow me to stream
 music files from my PC upstairs over wireless and preferably without
 loss of audio quality - the SB Touch in terms of size and convenience
 would have fit the bill nicely.
 
 However, what about the new NAD DAC-1, that looks interesting and is
 geared up for high quality uncompressed wireless streaming. Whereas it
 does have a DAC incorporated I will probably use it as a bridge to my
 own DAC because it has SPDIF out.

I may be missing your point, but the SB TOUCH can ALSO do high quality
uncompressed WIFI streaming.


-- 
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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-16 Thread guidof

stop-spinning;696100 Wrote: 
 Hmmm - I am trying to work out a solution that will allow me to stream
 music files from my PC upstairs over wireless and preferably without
 loss of audio quality - the SB Touch in terms of size and convenience
 would have fit the bill nicely.
 
 However, what about the new NAD DAC-1, that looks interesting and is
 geared up for high quality uncompressed wireless streaming. Whereas it
 does have a DAC incorporated I will probably use it as a bridge to my
 own DAC because it has SPDIF out.

Apparently, the NAD supports audio sample rates only up to 48/16,
according to the NAD site. And it has no display. The SBT supports
rates up to 96/24 and has a display.

Guido F.


-- 
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MUSIC ROOM:
Marantz TT 15S1 Turntable, Virtuoso Wood Cartridge-Conrad Johnson
Motif preamp
Oppo BDP-83 Universal Player-Cambridge Azur 840C DAC
Vortexbox Appliance-WiFi Bridge-Squeezebox Touch-Toslink-Cambridge
Azur 840C DAC-Adcom GFP-750 preamp-Music Reference RM-200 Mk II amp
- Martin Logan SL3s
DSpeaker Antimode 8033-REL T1 Sub
BEDROOM:
Squeezebox Touch (analog out)-Little Dot Mk III amp-AKG K701
headphones
SECOND BEDROOM:
Squeezebox Touch-Grado SR125 headphones

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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-16 Thread aubuti

darrenyeats;695950 Wrote: 
 About your comment about the integrity of the digital data - I agree but
 you mention it for ethernet and of course the comment applies equally to
 wifi. The question about wifi AND ethernet is about noise which might
 affect the player, not data.
Point taken. Although actually, for some of the fringe on this forum
the question is also about how the noise will affect the data over
ethernet. Personally, considering the distance, floors, walls,
switches, etc that come between the computer and the SBs, I'll take my
chances on an electrically noisy computer affecting either the data or
the player.  :-)


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-15 Thread darrenyeats

aubuti;695809 Wrote: 
 Yes there's RFI everywhere, but some believe that the RFI is more
 damaging to SQ if one of the RFI sources (the Touch's antenna) is
 inside the same little box as the DAC, CPU, etc. Inverse square law and
 all that.
 
 As for directly connected to an electrically noisy computer, well,
 that shouldn't affect the integrity of the digital data that gets sent
 down the ethernet cable.
 
About your comment about the integrity of the digital data - I agree
but you mention it for ethernet and of course the comment applies
equally to wifi. The question about wifi AND ethernet is about noise
which might affect the player not data.
Darren


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-14 Thread probedb

stop-spinning;695608 Wrote: 
 If this is the case, then why is wireless discouraged for sound quality
 reasons? Surely this the best way to isolate an electrically noisy
 computer source from the likes of a PC for example (assuming the
 simplicity of the SB Touch is much more electrically quieter than an
 all out monster gaming computer).

Because people are idiots :)

I'm surprised no-one has recommended filling rooms where the wireless
signals travel with a different gas because it results in better sound
quality. Of course you'd have to buy a gas mask because said gas would
be toxic to breathe. This would then lead onto the sale of audiophile
gas masks

Or am I taking it too far? ;)


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-14 Thread JJZolx

stop-spinning;695608 Wrote: 
 If this is the case, then why is wireless discouraged for sound quality
 reasons?

'RFI' (http://en.wikipedia.org/wiki/Radio_frequency_interference) is
the reason usually stated. Many audiophiles will not operate a wireless
network in their homes for the same reason.


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-14 Thread stop-spinning

Yes but there's RFI everywhere - one more wireless connection won't make
a difference surely?

Anyway - whats the lesser of two evils - directly connected to an
electrically noisy computer - or RFI (which is all around us anyway)?


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-14 Thread aubuti

stop-spinning;695800 Wrote: 
 Yes but there's RFI everywhere - one more wireless connection won't make
 a difference surely?
 
 Anyway - whats the lesser of two evils - directly connected to an
 electrically noisy computer - or RFI (which is all around us anyway)?
Yes there's RFI everywhere, but some believe that the RFI is more
damaging to SQ if one of the RFI sources (the Touch's antenna) is
inside the same little box as the DAC, CPU, etc. Inverse square law and
all that.

As for directly connected to an electrically noisy computer, well,
that shouldn't affect the integrity of the digital data that gets sent
down the ethernet cable.

Reasonable (and unreasonable) people differ on whether either of those
matter.


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-14 Thread Mnyb

Yes Ethernet is isolated current loops unless you opt for shielded cat 6
then you must take care but shielded Ethernet is total overkill at home
, just don't use that .

And switches isolates further .

There migth be some capacitive leakage bla bla but that's clutching at
straws audiophile style .

No Ethernet  problems is going to give you congested midrange or less
 fluid treble :) you will have a real problem that would be very
noticeable .


-- 
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Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x
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sub.
Bedroom/Office: Boom
Kitchen: Touch + powered Fostex PM0.4
Misc use: Radio (with battery)
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(in storage SB3, reciever ,controller )

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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-13 Thread stop-spinning

So in essence the musical data should be copied perfectly over wireless
to the SB Touch from the source (just like when you copy a hi-res photo
or video file from one computer to another and the image is still all
there when viewed from the target PC without any loss whatsoever).

If this is the case, then why is wireless discouraged for sound quality
reasons? Surely this the best way to isolate an electrically noisy
computer source from the likes of a PC for example (assuming the
simplicity of the SB Touch is much more electrically quieter than an
all out monster gaming computer).

If the overheads of WPA encryption and decryption is stressing out the
SB Touch then just send the Music over an open wireless network instead
(as long as you don't send your credit card details over this same
link).


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-13 Thread w3wilkes

If you have a reliable wireless connection then there should be no
difference in the sound quality of a wired connection. Bits are bits.
If you have a bad wireless environment you could experience dropouts in
the music from buffer underruns.


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-13 Thread Mnyb

stop-spinning;695608 Wrote: 
 
 If this is the case, then why is wireless discouraged for sound quality
 reasons? .

Yeah why , indeed ;) these are opinions from audiphiles the same people
that can argues that digital cables in silver sounds better or use
shakti stones and you read in on the internet the foremost source of
reliable unbiased information :)


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Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x
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sub.
Bedroom/Office: Boom
Kitchen: Touch + powered Fostex PM0.4
Misc use: Radio (with battery)
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(in storage SB3, reciever ,controller )

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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-13 Thread pippin

stop-spinning;695608 Wrote: 
 
 If this is the case, then why is wireless discouraged for sound quality
 reasons? Surely this the best way to isolate an electrically noisy
 computer source from the likes of a PC for example (assuming the
 simplicity of the SB Touch is much more electrically quieter than an
 all out monster gaming computer).
 

Because some People like to bullshit around about SQ and also people
always WANT to find something to optimize. It's the same type of
nonsense as to decode lossless formats of the server, use specific OSs
for your server or selling high-end power cables.


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---
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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-12 Thread pippin

In every streaming system (digital) the music is first copied to the
target, it's being delivered in packets.
However, the SB doesn't have to wait for the full 15s buffer to fill,
it can start to play as soon as the first decidable packet is there
(depends on the codec) and will fill the buffer in the background.


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Re: [SlimDevices: Audiophiles] Can anyone tell me how the wireless protocol works?

2012-03-12 Thread JJZolx

stop-spinning;695504 Wrote: 
 I am interested in how the wireless protocol works with a Squeezebox
 Touch (or Duet I guess for that matter)?

There is no 'wireless' protocol. The streaming protocol over the
network is the same for both wired and wireless connections.

 I noticed when I used one some while back that there was a large buffer
 in the Duet - when I disconnected the wireless link to the computer -
 the Duet was playing for about 15 or so seconds afterwards - which seem
 to be a decent size buffer.

Right, but the length of time the audio will play from the buffer will
depend on the degree of compression of the data. It might be 15 seconds
for WAV (PCM), or it might be a couple of minutes for MP3 at some low
bitrate.

 So I just wondered - when playing music initiated from the Personal
 Computer, there is a slight delay before starting - so does music first
 get 'copied' to the Squeezebox over the wireless network - then once
 copied (which should be perfect if using TCP/IP and CRC checksums)- it
 then actually gets played from the copy on the SB itself?

The buffer is prefilled to some degree (I think measured in bytes)
before playback will begin. The faster the server and the network, the
quicker this happens. And why a faster network connection (such as
wired 100 Mbps ethernet) will be more reliable. If there's a network or
server interruption, the faster network allows the buffer to refill more
quickly and avoid underruns.


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