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Post by sreehav on Oct 4, 2010 10:51:59 GMT -5
Hi all,
I have a Apple-TV as my music server which is connected to benchmark DAC1 using optical and analog out from DAC to Analog 4 in on UMC-1. Cables used Emotiva interconnects from DAC to UMC-1
Anti-IC's from UMC-1 to Emotiva UPA5.
the Input Mode is set to be Direct, no other settings in UMC-1
Issue is when select info of the song being played UMC-1 shows it as 48KHz even though DAC is outputting 24/192.
Could some one tell me what I'm doing wrong do anyone else had this issue
Any help is appreciated
Thank you
Vinod.
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Post by jlafrenz on Oct 4, 2010 16:17:50 GMT -5
What is the original source of the music and what is the bit/sample rate?
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Post by dreadpiratemarc on Oct 4, 2010 20:57:40 GMT -5
I'm a little confused. Maybe I read it wrong. If the DAC is converting to analog and your input to the UMC is analog, the UMC-1 could not show a sample rate of 48kHz or any other rate because it's input would be analog. The DAC, on the other hand, would be receiving a 48kHz signal from the Apple TV over digital. Someone who has one correct me, but one of the reasons I haven't gotten one yet is because I understand that it down-converts any high rez source material to 16bit/48kHz for it's optical out.
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Post by sreehav on Oct 4, 2010 22:10:03 GMT -5
audio source is AIFF 24bit/192 KHz
I just realized yes you are correct since the source is analog UMC-1 will not be able to measure so the what is displayed is not correct
Is it true that Apple TV down converts any high rez source to 16/48KHz.
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Post by ciphercomplete on Oct 5, 2010 16:57:17 GMT -5
Hi all, I have a Apple-TV as my music server which is connected to benchmark DAC1 using optical If this is your digital connection then it is now wonder that you can't do 24/192. Optical connections are only good up to 96 and even then the conditions have to be damn near perfect to keep the signal from dropping out. Coaxial or AES/EBU is the only way to go for 96, 192 or higher. If the Apple TV down converts for optical it is no doubt because it HAS to in order for it to output a reliable signal. |
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Post by PapaJac on Oct 5, 2010 20:18:05 GMT -5
audio source is AIFF 24bit/192 KHz I just realized yes you are correct since the source is analog UMC-1 will not be able to measure so the what is displayed is not correct Is it true that Apple TV down converts any high rez source to 16/48KHz. This is true. It convert anything to 16/48khz. |
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Post by PapaJac on Oct 5, 2010 20:20:22 GMT -5
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Post by PapaJac on Oct 5, 2010 20:35:16 GMT -5
Hi all, I have a Apple-TV as my music server which is connected to benchmark DAC1 using optical and analog out from DAC to Analog 4 in on UMC-1. Cables used Emotiva interconnects from DAC to UMC-1 Anti-IC's from UMC-1 to Emotiva UPA5. the Input Mode is set to be Direct, no other settings in UMC-1 Issue is when select info of the song being played UMC-1 shows it as 48KHz even though DAC is outputting 24/192. Could some one tell me what I'm doing wrong do anyone else had this issue Any help is appreciated Thank you Vinod. Another question: Where you're getting the 24/192 music? From a CD? If so, you really are not taking any advantage of 24/192 since the CD is 16/44. The only way to take advantage of 24/192 is by buying digital music at 24/192. For example from Linn Records. www.linnrecords.com/recording-the-nightingale-and-the-butterfly.aspxThis link ^ you can hear an example of true 24/192. Artist recording @ Linn Studio. Enjoy. |
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Post by jlafrenz on Oct 5, 2010 22:01:25 GMT -5
Hi all, I have a Apple-TV as my music server which is connected to benchmark DAC1 using optical and analog out from DAC to Analog 4 in on UMC-1. Cables used Emotiva interconnects from DAC to UMC-1 Anti-IC's from UMC-1 to Emotiva UPA5. the Input Mode is set to be Direct, no other settings in UMC-1 Issue is when select info of the song being played UMC-1 shows it as 48KHz even though DAC is outputting 24/192. Could some one tell me what I'm doing wrong do anyone else had this issue Any help is appreciated Thank you Vinod. Another question: Where you're getting the 24/192 music? From a CD? If so, you really are not taking any advantage of 24/192 since the CD is 16/44. The only way to take advantage of 24/192 is by buying digital music at 24/192. For example from Linn Records. www.linnrecords.com/recording-the-nightingale-and-the-butterfly.aspxThis link ^ you can hear an example of true 24/192. Artist recording @ Linn Studio. Enjoy. This is why I asked what the source was in an earlier post. The OP responded that he was using AIFF format. To me this would indicate he is using a computer and has found some hi-rez recordings. |
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Post by sreehav on Oct 6, 2010 14:19:45 GMT -5
I buy audio from HDTrack (FLAC) convert to AIFF with DBPoweramp.
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Post by iwf on Oct 6, 2010 15:29:26 GMT -5
The issue is almost certainly the apple TV. I wasn't aware iTunes could output 24/192 and in any case HD tracks is at most 24/96. Your apple is almost certainly outputting 16/48.
One way to find is to connect the apple to the umc directly. The umc will display the incoming bit rate.
If you really want to play hi res files then find an apple player capable of playing flac files directly.
I gave up on my Mac, so I use a win7 machine and j river's media center playing 24/96 directly into the umc. Can't wait for the xda, though the benchmark is no slouch. better than using analog and direct would be to use the 7.1 analog inputs on the umc.
The apple tv is the weak spot.
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Post by ciphercomplete on Oct 6, 2010 20:55:22 GMT -5
^^^Yes but none of that will matter unless he changes his digital cable to coaxial or some other standard that can carry a signal higher than 24/96. 24/96 is the absolute limit for optical cables. When using a optical cable to carry 24/96 anything and everything can effect the performance of the cable. For example I have personally experienced these two instances while attempting to output a 24/96 signal from this thing www.pacificvalve.us/MusilandMonitor02.html to a 24/96 capable dac. The length of the cable - using a optical cable longer than 1m to carry a 24/96 signal is asking for intermittent or complete failure. Shorten the cable and reliability increases. Is the cable coiled up behind your equipment - again doomed to at least intermittent failure . As I straighten my cable reliability increased. The stuff above sounds nitpicky but anytime you push any type of equipment to its limit you are bound to get quirky issues. You wont find many people recommending optical for anything over 24/48khz. Even if you get a optical cable to carry a consistent 24/96 signal the jitter will be much higher and it will suffer much more signal loss than its coaxial or AES/EBU counterpart in the same configuration. I say all that to say this , most manufacturers opt for reliability which is why imo Apple most certainly limited the output of the optical section to 48khz. Why they limited it to 16 bit over 24 bit is beyond me as Optical does 24/48 quite well. Try using the HDMI output on your Apple TV to see if the thing can output 24/192 or 24/96 straight to the UMC (it better!). Since the Apple TV does not have coaxial or AES/EBU outputs you will probably have to dump it for something that does unless you want to skip using the Benchmark and use your UMC as the DAC. |
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Post by sreehav on Oct 7, 2010 18:36:06 GMT -5
thank you guys looks like there is not much I could do with my apple TV. I will try windows 7 & j River my HTPC motherboard has SPDIF outpout maybe I could use it to connect to DAC
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