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Audiophilleo 1 and 2 USB to S/PDIF transport
Oct 7, 2012 at 7:14 AM Post #931 of 1,214
No no just a suggestion for the manufacturer.  Even if your DAC was BNC you have to use an adapter.  Make the output the actual connection with an adapter to the other.  I'm likely going to change because its $600 and no better to my ears than the throw in on my motherboard.
 
John Kenny has been good to talk to, very honest, but the new model is just ugly beyond belief.  The new functionality is great but the old look would have been better.
 
The reality is I'll likely just get a good internal sound card with 44 and 48 clocks and call it a day.
 
Oct 7, 2012 at 10:09 AM Post #932 of 1,214
The reason behind using BNC is for accuracy. If you want a true 75 Ohm output, you need BNC for that. It's also supports much higher bandwidth than RCA, which could become important when dealing with 24/176 or 192 files. Nearly all of the converters have native BNC outputs for that reason, the Off-Ramp is one of very few high-end models that even offer an RCA output.
 
Oct 7, 2012 at 11:59 AM Post #933 of 1,214
BNC can also transmit a signal with substantially less jitter compared to RCA (and significantly more when compared to optical).  You can just just a cheap adapter and you're exactly where with straight RCA but with the capability to use better cables (with correct impedance) later.
 
 
Oct 7, 2012 at 4:49 PM Post #934 of 1,214
Quote:
davebsc said:
Nearly all of the converters have native BNC outputs for that reason, the Off-Ramp is one of very few high-end models that even offer an RCA output.
Click to expand...

 
If by nearly all you means roughly 50% than sure.  RCA terminated digital cables that meet the 75ohm requirement have existed, and for cheap, for years now.
 
Anyway I shot Phil an email, see if I got a dud adapter.
 
Oct 7, 2012 at 7:05 PM Post #935 of 1,214
Well with help from John Kenny I finally dialed into what the presumably lower jitter 'sounds' like.  Ended up being easier to find on speakers than headphones.  The bass punches harder and image placement is more focused, pinpoint, less space.  John explained it as events occurring within a tighter frame so its less spread out over time.  When harmonics line up... more punch.  When events have clear edges... so does the stage.
 
So now the question is... is there another way here for less than the $600 AP2? JKSPDIF comes in at $450 shipped, the MF V-Link 192 at $250, the m2tech HF2 $185.
 
Oct 7, 2012 at 9:34 PM Post #936 of 1,214
I have both the Audiophileo 1 with pp and JKDAc32 . I use the Audiophileo pair with amarra and the JKDAC with jriver and jplay. The Audiophilio with one of my headphone rigs and the JKDAC with my quad - spendor and rel system. They both produce amazing sound , like I never heard before .
I have listen to a few 10k DACs and CD players and nothing has bettered these 2 amazing converters. I would recommend them to everyone outthere
 
Oct 7, 2012 at 11:51 PM Post #938 of 1,214
Well I got my replacement AP2 (working for now) and the original issue with the 1 second skipping still exists.
 
I've now tried it on every single usb port and still no luck :frowning2:
 
I've tried it with another dac and the issue still occurs.  But plugging it back into the mac and the problem is solved.
 
It's definitely something to do with how foobar executes the play command and causing the AP2 to lose sync for 1 second. I'm just not sure what yet.
 
Oct 8, 2012 at 12:13 AM Post #939 of 1,214
Hey Hpz, try a trial version of Jriver Media Center (Not to be confused with Jriver Media Player - this one doesn't have bit perfect output options iirc) see if that fixes the problem. 
 
Oct 8, 2012 at 3:59 AM Post #940 of 1,214
Just tested Jriver media Center and it works normally! yay.
 
Something strange happening with foobar :frowning2:
 
Update: Actually it seems that the default crossfade in JRiver some how doesn't cause the 1 second skip.  I changed it so that there is no crossfade and the issue still remains.  
 
As a side note at least in JRiver i can place a small 0.1 sec crossfade and the skip will not occur.  The 1 second skip still occurs when playing the very first song, which is bearable I guess.
 
Setting the Seek so that it is on Gapless gets rid of the skipping issue while seeking.
 
Oct 8, 2012 at 7:46 AM Post #941 of 1,214
The AP2 powers down if not used.  Big time grrr moment since I don't care about the tiny amount of A/C it uses.  But that could be your 1s silence.  I tend to double tap play to wake it, then play it.  I believe the AP1 has an option to disable that in the menu.
 
Oct 8, 2012 at 8:49 AM Post #942 of 1,214
The AP2 only powers down after about 30 or so mins of non use i think.  It definitely isn't the case of the AP2 powered down because it will constantly happen and I can repeat the issue. :frowning2:
 
For now I'm using the JRiver media centre with relatively good success.  The first song gets the stutter, but all subsequent songs played work fine (thanks to the crossfade).  Its something to do with the usb needing to reinitialise if i start the playback of a song.  The crossfade makes certain that the audio feed continues between songs and hence there is no stutter.
 
Oct 8, 2012 at 12:45 PM Post #943 of 1,214
Quote:
solude said:
 
If by nearly all you means roughly 50% than sure.  RCA terminated digital cables that meet the 75ohm requirement have existed, and for cheap, for years now.
 
Anyway I shot Phil an email, see if I got a dud adapter.
Click to expand...

 
At the high-end, converters with single S/Pdif outputs tend to use BNC jacks. Making an S/Pdif cable with a 75 Ohm impedance isn't that hard. RCA connectors and jacks are a different matter. Most of them are not 75 Ohm, regardless of what they claim.
 
Oct 8, 2012 at 1:19 PM Post #944 of 1,214
Most aren't, Canare RCAPs are :wink:  That said, define high end.  The only DAC on my radar is the PS PWD2 and its RCA as well.
 
In the end it really doesn't matter.  Think we can agree on this though... if you have BNC on one end and RCA on the other... you lose any advantage BNC had and possibly even worse since 75 ohm RCA standards aren't designed around BNC on the other side, ya?
 
Oct 8, 2012 at 4:31 PM Post #945 of 1,214
Quote:
solude said:
Most aren't, Canare RCAPs are :wink:  That said, define high end.  The only DAC on my radar is the PS PWD2 and its RCA as well.
 
In the end it really doesn't matter.  Think we can agree on this though... if you have BNC on one end and RCA on the other... you lose any advantage BNC had and possibly even worse since 75 ohm RCA standards aren't designed around BNC on the other side, ya?
Click to expand...


High-end converters. Anedio U2, Audiophilleo, ART Legato, Alpha USB, CIAudio Transient MK2, Diverter 192, Human Audio Tabla, Wavelink HS, Off-Ramp 5, all have BNC outputs as standard. The Soulution 590 USB and the Stahl-tek ABC offer both. Most high-end DACs offer both, the Alpha DAC is one of the few that is BNC only.
 
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