Results 26 to 50 of 53
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03-18-2020, 09:25 AM #26
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03-18-2020, 10:11 AM #27
Not when aptX is compared to CD's...
https://www.soundguys.com/the-ultima...aptx-hd-19914/"timberridge is terminally vapid" -- a fortune cookie in Yueyang
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03-18-2020, 10:18 AM #28
What I should do, is compare the sound quality of the nakamichi oms7 CD player through the hafler analog pre amp, and the Sony ES cdplayer, (junk plastic changer that showed up broken in the mail, but I fixed it) sending optical signal to the Sony ES pre amp, and pipe them both through the jbl amps and big b and o speakers. Then I will actually get to compare the quality of the sound between two totally different philosophy systems.
The nakamichi oms7 was a top of the line CD player known to have a very good sounding dac. The hafler analog pre amp is also well regarded, and sounds fabulous in the living room main system.
I mean, I'm stuck at home, so why not?
Here is the stack with the hafler analog pre amp, hafler amp, and nakamichi CD player.
sent from Utah.sigless.
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03-18-2020, 10:20 AM #29
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03-18-2020, 10:22 AM #30
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03-18-2020, 11:07 AM #31
"The usual sources" led me to HDTracks, where I happily set up an account so living musicians can get some royalties off my ass, and I can get high-bitrate files recorded direct from master by accomplished engineers with great gear.
I also have a couple DACs that have native DSD. SACD bitstream [DSD] is so so superior to CD [16bit PCM] that it's a different league altogether, but it's an end-to-end tech completely different from PCM, and a PITA to get right unless you bring $$ to the quest, or just happen to have "one of those" old Playstations [before Sony locked Playstations down they let a savvy tecno separate the DSD from PCM files on a dual layer SACD]. There's an otf conversion protocol called DOP that does a great job though, but it's still a conversion.
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03-20-2020, 04:33 PM #32
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03-20-2020, 04:36 PM #33
Yes? Among other reasons.
I’ll let someone more conversant in the minutiae explain...Forum Cross Pollinator, gratuitously strident
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03-20-2020, 09:21 PM #34
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03-20-2020, 10:05 PM #35
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03-21-2020, 05:54 AM #36Banned
- Join Date
- May 2007
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- Sandy, Utah
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Rug really ties it all together.
Sent from my Pixel 2 using TGR Forums mobile app
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03-21-2020, 11:55 AM #37
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03-21-2020, 12:30 PM #38
In that instance the DAC is in the phone. Anything out from the phone is analog, already processed by the phone.
BT protocol was devised as a hard cable replacement, so it could conceivably send bit-perfect digital audio to a DAC. But that would be a can of worms, with lots of overhead spent checksumming, etc.
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03-21-2020, 02:27 PM #39
That Ray rug is ugly as sin, but the kids are still regularly dumping food on it, so we'll let it ride a couple more years.
Seems like most of the phones can send a digital signal that bypasses the dac out, there are a number of external dacs you can plug into your phone.
Like this one...
https://www.audioquest.com/dacs/dragonfly/dragonfly-red
But I just want the bypass part, and a cable either coax or optic I can send to the pre amp.
sent from Utah.sigless.
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03-21-2020, 02:47 PM #40
This might do the trick.
https://hifigo.com/products/cayin-cs...QaAp8yEALw_wcB
sent from Utah.sigless.
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03-21-2020, 02:48 PM #41
$88?
Who do they think they are, Monster Cable?Forum Cross Pollinator, gratuitously strident
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03-21-2020, 06:03 PM #42action potential
- Join Date
- May 2008
- Posts
- 264
Why do you want to use your phone as a digital source? Is it because you have a large digital audio collection saved on your phone or because you want to use digital streaming services like Spotify?
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03-21-2020, 06:38 PM #43
Both. And with a good cable, I can set a tablet on there and use that. With this pre, I lose a bit converting from digital to analog at the phone, then back to digital in the pre, and back to analog. If I can just feed a clean digital to the pre, I should be good.
Don't get me wrong, I don't think this pre is the end all be all, but I do like it. I bet if I test it a vs b with the hafler, sort of a digital vs analog shootout, the hafler will win. But the tv puts out a digital signal, and this pre is a fun toy. The imaging is fantastic, the speakers just sort of disappear, even my 7 year old commented about how you can't tell that the sound is actually coming out of the speakers, but it is. You can pick out instrument locations across the stage with your eyes closed, and the parametric eq is really cool.
sent from Utah.sigless.
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03-21-2020, 06:41 PM #44
Soundstage/imaging is what I get out of high end audio the most (or at least used to).
Now most of my critical listening now is either In my truck, or while biking. Too much noise to signal for subtleties, sadly.Forum Cross Pollinator, gratuitously strident
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03-21-2020, 11:18 PM #45
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03-22-2020, 12:37 AM #46
The phone converts from a digital file to analog, then it outs to BT, like it was headphones. BT is FM radio, which has an analog carrier, but BT converts to [lossy] SBC or [better] AptX codec to mod/demod the signal.
So yeah, you're right about BT using a digi signal, but chances are it's converted from an analog source from the phone's DAC. Double conversion whammy.
When audio freaks talk about "Bit-perfect", they are talking about an exact replica of the lossless flac or wav or dff file being streamed into a DAC that can strip the containers and process the 1s and 0s without adding or losing anything that the artists and engineers recorded - "Fidelity".
It's harder than it sounds, as most players add all sorts of shit to what goes into the DAC - dithering, equalization, room effects like delay, compression, volume, etc
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03-22-2020, 09:17 AM #47
So I am learning. USB digital out is not suitable to go straight to a digital input plug. USB digital out sends packets of data that are different from the pulses in a s/pdif signal. So. To go from USB digital signal, to optical or coaxial spdif, you need a USB to spdif bridge decoder. Then you will have a digital signal that can be read by your dac.
Apparently clocking of the signals is a huge issue. When the clocks synchronizing the signals go "off" you get signal jitter that the dac has trouble decoding as a 1 or 0.
sent from Utah.Last edited by basinbeater; 03-22-2020 at 09:42 AM.
sigless.
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03-22-2020, 09:42 AM #48
Here is a device that would do the trick..... For $1200....
https://www.mutec-net.com/product_mc-3-plus-usb.php
sent from Utah.sigless.
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03-22-2020, 09:52 AM #49
And something like this from China for a lot less than $1200.
https://www.ebay.com/itm/254270854835
sent from Utah.sigless.
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03-22-2020, 10:10 AM #50
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