Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-17 Thread Phil Leigh

kphinney;496366 Wrote: 
 Bandwidth limiting enabled?  Who mentioned that and where did you find
 that setting? 
 
 It's not the case -- there is ample bandwidth to stream multiple more
 amounts of SB3's on one 802.11g network.
 
 
 Can you explain where your knowledge of the stream sync comes from? 
 Particularly where in the SB Server you personally noticed this or in
 what documentation you found this?
Bandwidth limiting is not the issue here (other than if you do enable
it on one player in a synch group, MP3 streams are sent to ALL SYNCHED
players!).

The issue here is that for synched players, the server is only sending
ONE stream and that stream WILL be at the lowest common denominator rate
that the synched players can handle. Un-synched players are unaffected.

I just proved this by sending 24/96 streams to Radio and Touch
un-synched. The radio plays 24/48 via a SOX downsampled stream, whereas
the Touch gets a 24/96 stream - the display on my TACT shows me this.

However, if I then synch them, both Radio AND Touch get 24/48 via SOX.
This is because there is only ONE stream for synched players.


-- 
Phil Leigh

You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...
SB Touch Beta (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W -
MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x
LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue
Jeans Digital,Kimber Speaker  Chord Interconnect cables
Kitchen Boom, Outdoors: SB Radio

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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-17 Thread cunobelinus
Only you can answer that, of course, but I hope this may help:

Squeezeboxes don't allow FF and RW in ALAC. They do allow it for .wav, .aiff, 
and .flac. ALAC is therefore not as flexible for SB as .aiff (or the others), 
although of course it is great for iTunes and iPods, and for keeping storage 
space down while using lossless files.

I therefore myself use .aiff for Squeezeboxes (played through two systems, one 
purely Quad, one of Quad amps and speakers that I won't mention on an 
audiophile list!); ALAC for my iPod 4th gen; and AAC at 256kbps for the touch 
and the nanos, all catalogued in different iTunes libraries . The lossless 
files are stored on a 1TB external HD, with an ALAC back up on a second one; 
and the AAC files are on the iMac.

System in all is iMac 3.06Ghz running 10.6.2, using iTunes to rip, tag and 
catalogue, playback using one SB2 and one Classic, and - between the family - 
iPods 4th gen, Touch and Nano.

What ripping/tagging/cataloguing software do you use? That is also a big 
factor, of course.

My suggestion would be that for SB on a Mac you actually go the other way, and 
change from ALAC and WAV to AIFF. But chacun à son goût, as they say in 
Hampstead.


On 16 Dec 2009, at 22:15, kphinney wrote:

 SIDE QUESTION - Should I change WAV and AIFF to ALAC?

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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-17 Thread kphinney

Phil Leigh;496436 Wrote: 
 Bandwidth limiting is not the issue here (other than if you do enable it
 on one player in a synch group, MP3 streams are sent to ALL SYNCHED
 players!).
 
 The issue here is that for synched players, the server is only sending
 ONE stream and that stream WILL be at the lowest common denominator rate
 that the synched players can handle. Un-synched players are unaffected.
 
 I just proved this by sending 24/96 streams to Radio and Touch
 un-synched. The radio plays 24/48 via a SOX downsampled stream, whereas
 the Touch gets a 24/96 stream - the display on my TACT shows me this.
 
 However, if I then synch them, both Radio AND Touch get 24/48 via SOX.
 This is because there is only ONE stream for synched players.

Excellent, thanks Phil.  That is just the info I was looking for.

Do you know of a way to check this without the TACT's DA display?


-- 
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-I like it, you may not.  I understand and respect that.-

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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-17 Thread kphinney

cunobelinus;496450 Wrote: 
 Only you can answer that, of course, but I hope this may help:
 
 Squeezeboxes don't allow FF and RW in ALAC.
 
 ..My suggestion would be that for SB on a Mac you actually go the
 other way, and change from ALAC and WAV to AIFF. But chacun à son goût,
 as they say in Hampstead.
 
 
 On 16 Dec 2009, at 22:15, kphinney wrote:
 
  SIDE QUESTION - Should I change WAV and AIFF to ALAC?

Right, thanks.  I meant to pose the question as a discussion about
system resources and the associated ideal transcoding but thanks for the
refresher on which lossless format allows what.
Thanks.


-- 
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-I like it, you may not.  I understand and respect that.-

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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-17 Thread JJZolx

I'd have to say that the defaults are ideal.  You really have to
understand what's going on under the hood to change them.  So much is
dependent on a combination of the OS of the system running the server,
the players being streamed to at any given moment, syncing, file
bitrates and resampling, that there can't be any blanket recommendation
other than leave it the  alone. :)

The settings page also isn't structured ideally, as there's a lot of
logic built into the server itself that isn't represented.  Logic that
takes into account all of the simultaneous factors listed above.


-- 
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Jim

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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-17 Thread kphinney

JJZolx;496612 Wrote: 
 I'd have to say that the defaults are ideal.  You really have to
 understand what's going on under the hood to change them.  So much is
 dependent on a combination of the OS of the system running the server,
 the players being streamed to at any given moment, syncing, file
 bitrates and resampling, that there can't be any blanket recommendation
 other than leave it the  alone. :)
 
 The settings page also isn't structured ideally, as there's a lot of
 logic built into the server itself that isn't represented.  Logic that
 takes into account all of the simultaneous factors listed above.

I fully agree.  That's why I came here to ask before mucking about and
really messing something up.
I remember when I set it up originally for the SB2, then SB3, what
seems like 5 years ago and it was a bit of a headache.  (I think that's
how I came across these forums.)  Now that I swapped the SB3/DAC out for
a TP I wanted to see if the settings I changed held through the years
and should be changed/changed back.

Thanks all.  Unless someone see's something that'd be a sound boon for
the TP, I think everything is answered.


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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-16 Thread kphinney

Snarlydwarf, 
Great to hear from you after all these years.  Your post brings up a
question.  Specifically:
snarlydwarf;496321 Wrote: 
 By default: lossless files will be sent with the best lossless method
 the device knows how to handle...
 
 ...On things like the SB1 that doesn't do FLAC, things get sent as WAV
 instead of FLAC, unless it's mp3, which the SB1 can do natively

This brings me to an unanswered question I have in the Server forum:
Does my S. Server know or have the juice, or bandwidth... actually how
about DOES the S. Server stream the best format to all attached
devices or just the one that fits all of them?

Will a sync'd SB3 and TP receive the same file or, let's assume they
are in FLAC, will they both receive a down-sampled version?

Best,
K


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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-16 Thread snarlydwarf

kphinney;496325 Wrote: 
 
 To paraphrase the unanswered question in the Server forum:
 Does my S. Server know or have the juice, or bandwidth... actually
 let's just simplify it and ask: DOES the S. Server stream the best
 format to all attached devices or just the one that fits all of them?

For SB2 and later, it will want to use FLAC for lossless (or something
it has to transcode).  The SB1 it will use WAV for streaming.  The
'capabilities' of the TP and SB2/3/Classic are almost the same, the
difference is transporter supports higher sample rates and bit depths
(ie, 24/96).

In the case of such a file it will transcode the flac to 24/48 for the
SB2/3/Classic and leave as-is for the TP.

 
 Will a sync'd SB3 and TP receive the same file or, let's assume they
 are in FLAC, will they both receive a down-sampled version?
 

Hrrm, good question.  Someone stole my radio, so can't check right now.

(The bad part of bringing the radio to work is they keep stealing it to
show off cool networking toys.  I should get a commission on sales of
the damned thing, but nooo... I just have to have no music for 3
hours...)


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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-16 Thread snarlydwarf

kphinney;496331 Wrote: 
 How may I check?

Play a 24/96 FLAC on the SB3 and Transporter synced.

The track information should show you if it's been transcoded for both
or for just the SB3.

Hrrm... simple test:

I just set my livingroom player and bedroom to sync.

I set the livingroom to be rate limited to 64kbps.

that does appear (at least from the webui) to have them both at 64kbps
transcoded.

So, in the case of syncing, it seems to take the lowest common
denominator to keep them synced.


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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-16 Thread kphinney

Ah!  This may go quite a long way to explain my lack of difference
between my TP and my SB3 + DAC.  Or if anything the SB3/DAC had a better
stage and resolution.  I had them sync'd and plugged into Transport and
AUX on my amp and clicked between the two.

Unfortunately, I'm now back at home and can't give it another go until
the weekend when I go back tot he cabin.


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Re: [SlimDevices: Audiophiles] Best settings for transcoding?

2009-12-16 Thread kphinney

Robin Bowes;496362 Wrote: 
 
 
 Yes, that would explain why they are the same, esp. if the SB3 is
 wireless and you have bandwidth limiting enabled!
 
 To the best of my knowledge, when two or more players are synced they
 will all play the same stream which will be in the highest quality
 format supported on all synced machines.
 
 R.
Bandwidth limiting enabled?  Who mentioned that and where did you find
that setting? 

It's not the case -- there is ample bandwidth to stream multiple more
amounts of SB3's on one 802.11g network.


Can you explain where your knowledge of the stream sync comes from? 
Particularly where in the SB Server you personally noticed this or in
what documentation you found this?


-- 
kphinney

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