Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-08-02 Thread ermine

amcluesent;216839 Wrote: 
 96/24 is confusing! As the GBP:USD rate is so good, I d/l Symphonie
 Fantastique as a FLAC from HighDefTapeTransfers.com (Meta tags were
 non-existant BTW).
 

Thank you for the tip to this place! I've never seen the point of
paying to d/l crappy compressed music before. Now at least I can see a
reason to pa yto d/l, I'll give this place a go. Must be a moral in
there for the record companies in there somewhere!


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-25 Thread Videodrome

DCtoDaylight;216936 Wrote: 
 The attraction of 96K Sampling (not up sampling) over 44.1K sampling, is
 that it moves the brick wall filter from 22.05 kHz to 48 kHz.  This can
 have audible benefits, because the 22kHz filter usually has measurable
 affects in the audible pass band.  Move the filter to 48k and the
 effects are outside of the audible portion of the pass band.
 
 Oversampling on playback allows similar movement of the re-construction
 filter, and has been used by all playback systems for 20 years now
 (recall 4x or 8x oversampling, or 176K or 352K to keep the same scale).
 Usually, its used to allow a low order re-construction filter (ie, the
 reconstruction filter does NOT have to be a brick wall design, 3-4th
 order is usually enough).
 
 Upsampling is a term used by some to describe what they feel is a
 better oversampling algorithm, but the cold fact of the matter is that
 there's really no difference to the two.  They are both changing the
 data rate, but neither is really capable of recreating what has been
 lost by the original anti-aliasing filter.  Even if you knew exactly
 how to compensate for the audible affects of the anti-aliasing filter
 in one studio's A/D, it wouldn't necessarily work for another.  
 
 Hope this doesn't just confuse things more!
 Cheers,  Dave

Thanks for the response Dave.  I guess I need one more point of
clarification: you mention there is no difference between upsampling
and oversampling, but I though there is one key difference in that
upsampling is done completely in the digital domain upstream from the
DAC (as is the case with my Behringer SRC2496).


-- 
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Two-channel System:
SB3, into Musiland MD-10 DAC;
Outlaw 970 Pre/Pro;
McCormack DNA-125 amplifier;
Quad 11L speakers;
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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-25 Thread DCtoDaylight

Videodrome;217008 Wrote: 
 I thought there is one key difference in that upsampling is done
 completely in the digital domain upstream from the DAC (as is the case
 with my Behringer SRC2496).

Sorry no, both upsampling and oversampling are done completely in the
digital domain.  Where exactly it's done is hardware dependent. Older
hardware tends to split the oversampling and actual Digital to Analog
Conversion (DAC) into two chips, for example my Sonic Frontiers DAC
uses a Pacific Microsonics HDCD filter chip to do the upsampling, and a
Burr Brown DAC chip to do the actual digital to analog conversion. 
Newer hardware, like an SB3 or Transporter has a more complicated DAC
chip which performs both functions internally.  But regardless of the
hardware, in both cases the oversampling is done in the digital domain,
before the conversion to analog.

Cheers,  Dave


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread stormy

Pale Blue Ego;216120 Wrote: 
 Download one or more of these.  They are 24/96 FLAC files:
 
 http://01688cb.netsolhost.com/samplerdownload/

I tried these on my SB3 more out of curiosity than anything else. They
play fine, but I noticed my AV Receiver was receiving PCM 44.1Khz from
the SB3. My AV Receiver supports 96Khz so I am assuming that the SB3
only outputs at 44.1Khz or is there something else I have missed?

Also I can't play them on my Soundblaster Audigy 2 ZS in Windows with
FLAC or Winamp, they play but there is no sound? The Audigy is supposed
to support 24/96 isnt it? I had that output in Vista set at 24Bit,
96Khz.

Thanks,

Mike


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread Pale Blue Ego

stormy;216774 Wrote: 
 I tried these on my SB3 more out of curiosity than anything else. They
 play fine, but I noticed my AV Receiver was receiving PCM 44.1Khz from
 the SB3. My AV Receiver supports 96Khz so I am assuming that the SB3
 only outputs at 44.1Khz or is there something else I have missed?

The SB3 drops every other sample and plays them as 24/48kHz.  Not sure
why your receiver is displaying 44.1.  Look at the track info (--) on
the SB3 as it plays, it should give you the bit depth and sampling
rate.

I'm able to play them on the PC using Foobar2000 through a Turtle Beach
soundcard on Windows2000.  I have no experience with Soundblaster or
Vista.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread amcluesent

96/24 is confusing! As the GBP:USD rate is so good, I d/l Symphonie
Fantastique as a FLAC from HighDefTapeTransfers.com (Meta tags were
non-existant BTW).

It played fine on my SB3 and TP, reporting 96k on both; I assume the
SB3 was silently dropping samples/bits (It also played fine on
foobar2000).

Assuming the TP was doing 96/24 'for real', my 100% subjective
experience with no control sample was that this encoding did convey the
physical intensity of a symphony orchestra going a full tilt in a way
that I hadn't experienced with 'red book' rips.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread Phil Leigh

amcluesent;216839 Wrote: 
 96/24 is confusing! As the GBP:USD rate is so good, I d/l Symphonie
 Fantastique as a FLAC from HighDefTapeTransfers.com (Meta tags were
 non-existant BTW).
 
 It played fine on my SB3 and TP, reporting 96k on both; I assume the
 SB3 was silently dropping samples/bits (It also played fine on
 foobar2000).
 
 Assuming the TP was doing 96/24 'for real', my 100% subjective
 experience with no control sample was that this encoding did convey the
 physical intensity of a symphony orchestra going a full tilt in a way
 that I hadn't experienced with 'red book' rips.

But was there a really big difference between the SB and tp playback? I
ask because in my experience 96 v 44.1 is neither here nor there,
whereas 16 v 24 can be heard quite easily.


-- 
Phil Leigh

You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...

...SB3+TACT+Altmann+MF DACXV3/Linn tri-amped Aktiv 5.1 system and some
very expensive cables ;o)

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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread Videodrome

Correct me if I'm wrong, but isn't part of the attraction to 96K
upsampling to reduce the brick wall effect of filtering at or near 44.1
kHz?  And thus by doing so, better / smoother filtering occurs?  With
less aliasing, quantization noise, etc.?

Now, unlike the most of you, I'm NOT a computer guy.  Nor did I stay in
a Holiday Inn Express last night, so I may be missing the boat here.

I can tell you, however, I recently added a SRC Behringer 2496 to the
digital stream before my DAC and, at 24/96 upsampling, I like what I
hear.

Also, what's the mathematical magic to upsampling to 88kHz vs. 96kHz. 
Are bits really that OCD?


-- 
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Two-channel System:
SB3, into Musiland MD-10 DAC;
Outlaw 970 Pre/Pro;
McCormack DNA-125 amplifier;
Quad 11L speakers;
Sota Sapphire ttbl. w/ Grado Ref. Platinum Cart. into Rolls Bellari
VP-129 tube phono stage;
Marantz 10b;
Nakamichi RX505;
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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread Phil Leigh

Videodrome;216862 Wrote: 
 Correct me if I'm wrong, but isn't part of the attraction to 96K
 upsampling to reduce the brick wall effect of filtering at or near 44.1
 kHz?  And thus by doing so, better / smoother filtering occurs?  With
 less aliasing, quantization noise, etc.?
 
 Now, unlike the most of you, I'm NOT a computer guy.  Nor did I stay in
 a Holiday Inn Express last night, so I may be missing the boat here.
 
 I can tell you, however, I recently added a SRC Behringer 2496 to the
 digital stream before my DAC and, at 24/96 upsampling, I like what I
 hear.
 
 Also, what's the mathematical magic to upsampling to 88kHz vs. 96kHz. 
 Are bits really that OCD?


realtime44.1 to 96 is computationaly more tricky and requires decisions
whereas 44.1 to 88.2 is simply doubling...

All of it rather pointless IMHO when the DAC will do it internally
anyway (usually to 384, 768 or even higher)
YMMV


-- 
Phil Leigh

You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...

...SB3+TACT+Altmann+MF DACXV3/Linn tri-amped Aktiv 5.1 system and some
very expensive cables ;o)

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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread amcluesent

But was there a really big difference between the SB and tp playback?

I never A-Bed them, I was just wondering if the SB3 would work at all.
IIRC Sean has posted that 96k on the SB3 was a hack he regretted doing
at all.

SB3 and TP analogue outs sound way different IMHO, like going from 320k
MP3 to FLAC.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-24 Thread DCtoDaylight

Videodrome;216862 Wrote: 
 Correct me if I'm wrong, but isn't part of the attraction to 96K
 upsampling to reduce the brick wall effect of filtering at or near 44.1
 kHz?  

The attraction of 96K Sampling (not up sampling) over 44.1K sampling,
is that it moves the brick wall filter from 22.05 kHz to 48 kHz.  This
can have audible benefits, because the 22kHz filter usually has
measurable affects in the audible pass band.  Move the filter to 48k
and the effects are outside of the audible portion of the pass band.

Oversampling on playback allows similar movement of the re-construction
filter, and has been used by all playback systems for 20 years now
(recall 4x or 8x oversampling, or 176K or 352K to keep the same scale).
Usually, its used to allow a low order re-construction filter (ie, the
reconstruction filter does NOT have to be a brick wall design, 3-4th
order is usually enough).

Upsampling is a term used by some to describe what they feel is a
better oversampling algorithm, but the cold fact of the matter is that
there's really no difference to the two.  They are both changing the
data rate, but neither is really capable of recreating what has been
lost by the original anti-aliasing filter.  Even if you knew exactly
how to compensate for the audible affects of the anti-aliasing filter
in one studio's A/D, it wouldn't necessarily work for another.  

Hope this doesn't just confuse things more!
Cheers,  Dave


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-23 Thread Pale Blue Ego

It might have been the SB3 whose CPU bogged down with the higher
compression rates.  Using a compression level of 0 or 1 was the
solution.

The Transporter has a faster CPU and bigger buffer, so it should be 
unaffected by the higher FLAC compression levels.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-23 Thread Mark Lanctot

Pale Blue Ego;216529 Wrote: 
 The Transporter has a faster CPU and bigger buffer, so it should be 
 unaffected by the higher FLAC compression levels.

It does have a faster CPU, 325 Mhz (?) but it's mostly to power the
second screen.  I do not believe it has a bigger buffer though, or if
it does the wiki should be updated:
http://wiki.slimdevices.com/index.cgi?HardwareComparison 25 Mb buffer.

You have to go to great lengths to get it to choke.  You must use FLAC
level = 8, ReplayGain and the full-spectrum visualizer at the same
time.  See http://bugs.slimdevices.com/show_bug.cgi?id=4463


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread dudeymon

Thanks to all for the interest.

I think Phil is correct on my problem.  My Goldwave 96/24 file may not
have a proper header.  I built it by taking a 44/16 wav CD song ripped
with dbPowerAmp, and then used Goldwave to resample it to 96/24.  The
new file would not play on Transporter.

I later to the same 96/24 file and converted it to FLAC with
dbpoweramp, and the FLAC file played fine.  Then I took the FLAC file
and rebuilt the 96/24 WAV with dbpoweramp, and now it plays fine as
well.

So I bet I just need to figure out the header differences and I'll be
in business.

My ultimate goal is to use some upsampling software I wrote to take
44/16 WAV and upsample to 96/24.  I use some methods with my upsampling
algorithms that I believe smooth out the sound and make it sound more
analog-vinyl like.  I already do that now upsampling to 192/24  then
burning to DVD-A for playback.  It sounds fantastic, but I'm getting
tired of DVD burning and want to leave the music on my hard drives.  So
I will re-write the code to do 96/24 as well.

Thanks again.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread Phil Leigh

dudeymon;216368 Wrote: 
 Thanks to all for the interest.
 
 I think Phil is correct on my problem.  My Goldwave 96/24 file may not
 have a proper header.  I built it by taking a 44/16 wav CD song ripped
 with dbPowerAmp, and then used Goldwave to resample it to 96/24.  The
 new file would not play on Transporter.
 
 I later to the same 96/24 file and converted it to FLAC with
 dbpoweramp, and the FLAC file played fine.  Then I took the FLAC file
 and rebuilt the 96/24 WAV with dbpoweramp, and now it plays fine as
 well.
 
 So I bet I just need to figure out the header differences and I'll be
 in business.
 
 My ultimate goal is to use some upsampling software I wrote to take
 44/16 WAV and upsample to 96/24.  I use some methods with my upsampling
 algorithms that I believe smooth out the sound and make it sound more
 analog-vinyl like.  I already do that now upsampling to 192/24  then
 burning to DVD-A for playback.  It sounds fantastic, but I'm getting
 tired of DVD burning and want to leave the music on my hard drives.  So
 I will re-write the code to do 96/24 as well.
 
 Thanks again.

If you really want it to sound like vinyl, I suggest you restrict the
frequency response and dynamic range, add some low level low and high
frequency noise and the odd random click plus random speed variations
- that should get you pretty close. :o)

Seriously, upsampling is not going to add anything - especially to 96
or 192 which aren't even simple multiples of 44.1.

I really don't understand why anyone wants to do this. DAC's upsample
internally anyway - at least modern ones do.

Just my 2 cents worth.


-- 
Phil Leigh

You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...

...SB3+TACT+Altmann+MF DACXV3/Linn tri-amped Aktiv 5.1 system and some
very expensive cables ;o)

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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread dudeymon

Phil Leigh;216378 Wrote: 
 If you really want it to sound like vinyl, I suggest you restrict the
 frequency response and dynamic range, add some low level low and high
 frequency noise and the odd random click plus random speed variations
 - that should get you pretty close. :o)
 
 Seriously, upsampling is not going to add anything - especially to 96
 or 192 which aren't even simple multiples of 44.1.
 
 I really don't understand why anyone wants to do this. DAC's upsample
 internally anyway - at least modern ones do.
 
 Just my 2 cents worth.
I'm OK with your opinion.  I just think I can do upsampling better than
most of the DACs do, that's all.  I'm not using linear extrapolation or
numeric transformations, but instead trying to emulate what I think a
top flight turntable/cartridge would present in a continuous waveform.

As far not adding anything, I think you are wrong.  I can clearly hear
more subtle details in the music with my upsampling.  

Even simple dithering techniques have been shown to bring out finer
details in music that could not be easily discerned before the
dithering was applied.  This fact has been generally accepted for
several years.  

I don't want to start another evil-war thread here, so please don't
flame me if you think strongly otherwise.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread Phil Leigh

dudeymon;216391 Wrote: 
 I'm OK with your opinion.  I just think I can do upsampling better than
 most of the DACs do, that's all.  I'm not using linear extrapolation or
 numeric transformations, but instead trying to emulate what I think a
 top flight turntable/cartridge would present in a continuous waveform.
 
 As far not adding anything, I think you are wrong.  I can clearly hear
 more subtle details in the music with my upsampling.  
 
 Even simple dithering techniques have been shown to bring out finer
 details in music that could not be easily discerned before the
 dithering was applied.  This fact has been generally accepted for
 several years.  
 
 I don't want to start another evil-war thread here, so please don't
 flame me if you think strongly otherwise.


I don't feel strongly - hence the smiley! I never want flame wars.

But...dithering and upsampling are rather different techniques...
Dithering has some basis in science (sort of).

Also - I'm sure you would agree that there is NO way that upsampling
can add accurate information - all it can do is interpolate, which is
simply a guess and NOT real data!


-- 
Phil Leigh

You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...

...SB3+TACT+Altmann+MF DACXV3/Linn tri-amped Aktiv 5.1 system and some
very expensive cables ;o)

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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread dudeymon

Phil Leigh;216394 Wrote: 
 Also - I'm sure you would agree that there is NO way that upsampling can
 add accurate information - all it can do is interpolate, which is simply
 a guess and NOT real data!
You're right - there is no way of adding back accurate information. 
It's always a guess.  But, if I can make a pretty good guess - based on
a thorough analysis of the samples I do have before and after the gap, I
can potentially provide additional information that, while not accurate,
may be better than no additional information at all. At least, that's my
goal.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread Phil Leigh

dudeymon;216395 Wrote: 
 You're right - there is no way of adding back accurate information. 
 It's always a guess.  But, if I can make a pretty good guess - based on
 a thorough analysis of the samples I do have before and after the gap, I
 can potentially provide additional information that, while not accurate,
 may be better than no additional information at all. At least, that's my
 goal.

I see. Interesting.
I agree that IF (and it is a big if) you could acurately calculate the
interim values that would be a good thing.
However, my experience is that the sampling frequency )above 44.1khz)
is not really important to perceived quality - but the bit depth is. If
you could interpolate intelligently from 16 bit to 24 bit that would be
great - even at 44.1


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You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...

...SB3+TACT+Altmann+MF DACXV3/Linn tri-amped Aktiv 5.1 system and some
very expensive cables ;o)

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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread Pale Blue Ego

dudeymon, why don't you try a 24/88.2 upconverted file on your
transporter?  You might get a cleaner conversion by sticking with a
strict 2x multiple on the sample rate.  Just a thought.

Also, I would use FLACs instead of WAVs, for savings of space,
bandwidth, and the ability to tag.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-22 Thread dudeymon

Pale Blue Ego;216405 Wrote: 
 dudeymon, why don't you try a 24/88.2 upconverted file on your
 transporter?  You might get a cleaner conversion by sticking with a
 strict 2x multiple on the sample rate.  Just a thought.
 
 Also, I would use FLACs instead of WAVs, for savings of space,
 bandwidth, and the ability to tag.I've thought about 88.2/24, and will try it 
 and compare to 96/24.  I'll
let you know what I find.  My algorithm upsamples to 441K/32b.  Then I
work down to whatever sampling frequency I want.  So the 88.1 vs 96
won't matter much to my code I don't think.  But we'll see.

Regarding FLAC, I've heard others say that the transporter has some
problems decoding FLAC with compression levels over 4 or 5.  I have no
experience either way.  Anybody had a problem with FLAC at 96/24?

Thanks for the input.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-21 Thread Pale Blue Ego

Download one or more of these.  They are 24/96 FLAC files:

http://01688cb.netsolhost.com/samplerdownload/


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-21 Thread dudeymon

Thanks - PBE - will download and see what happens.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-21 Thread dudeymon

The FLAC file plays fine.  Thanks.

But shouldn't it play an uncompressed WAV 96/24 as well.  I wonder if
the lack of compression is overloading the wireless?

Have you ever played uncompressed WAV files at 96/24?

Thanks.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-21 Thread Phil Leigh

dudeymon;216036 Wrote: 
 I moved my 96K file to a new folder  got it to show up in slimserver. 
 But when I try to play the file, it never starts - the browser window
 just resets over  over trying to play it.  Again, the file plays fine
 in Windows.

The WAV header is corrupt (or rather, non-standard). There are 2
standards for WAV headers. Only one of them is supported by the SB
AFAIK.
It's nothing to do with the wireless.


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You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...

...SB3+TACT+Altmann+MF DACXV3/Linn tri-amped Aktiv 5.1 system and some
very expensive cables ;o)

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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-21 Thread Phil Leigh

I realise this isn't what you were asking, but are these files upsampled
(in Goldwave) from 44.1/16 CD rips?


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You want to see the signal path BEFORE it gets onto a CD/vinyl...it
ain't what you'd call minimal...

...SB3+TACT+Altmann+MF DACXV3/Linn tri-amped Aktiv 5.1 system and some
very expensive cables ;o)

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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-21 Thread Pale Blue Ego

I can play 24-bit WAVs on my SB3, but I have a wired connection.  Try
converting the WAVs to FLAC to save bandwidth.


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-21 Thread DCtoDaylight

I play uncompressed 96k/24 bit files on my Transporter without problems,
using a wired ethernet.  When you say they won't play on your wireless
network, can you provide a bit more information?  If you display the
buffer level on the Transporter, does is stay very low?  How does this
compare to the level when playing 44.1K CD files?  Ideally it should
stay fairly high, no matter what your source material, but perhaps your
wireless network is marginal...


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[SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-20 Thread dudeymon

Hi All - 

Just got my transporter today and starting to use.

I have a question about playing 96K/24b WAV files.  I have a few
resampled files done by Goldwave that play fine using Windows media
player and are clearly 96K/24b in the file properties, but I can't get
Slimserver to recognize the file for me to play on the Transporter.

Does anybody have any sample WAV 96K/24b files they could send me or
point me to that do work that I can test with?

My guess is that I am doing something wrong or the file is not properly
formated by Goldwave.

Thanks.

Dudeymon


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Re: [SlimDevices: Audiophiles] New User - Please help with 96K playback

2007-07-20 Thread dudeymon

I moved my 96K file to a new folder  got it to show up in slimserver. 
But when I try to play the file, it never starts - the browser window
just resets over  over trying to play it.  Again, the file plays fine
in Windows.


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