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Post by KY_Bourbon on Feb 19, 2017 9:44:35 GMT -5
How do I connect the PT-100 to my HTPC via USB instead of the optical? Just use a simple USB cable? Is it really that easy?
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Post by KY_Bourbon on Feb 19, 2017 9:51:49 GMT -5
I think I just discovered that optical is better than USB on this particular unit.
Is that correct?
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Post by frenchyfranky on Feb 19, 2017 10:51:27 GMT -5
To obtain a better result with USB and windows pc, you need to use a software like JRiver using the Wasapi protocol to take all the advantage of USB.
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Post by frenchyfranky on Feb 19, 2017 10:54:08 GMT -5
The advantage of USB is to eliminate two steps of digital conversion for optical spdif.
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Post by Chuck Elliot on Feb 19, 2017 13:24:52 GMT -5
I think I just discovered that optical is better than USB on this particular unit. Is that correct? Yes, in some ways. USB will only go to 96k sample rate. TOSLink or Coax will go to 192k. |
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Post by macromicroman on Feb 19, 2017 16:38:55 GMT -5
I think I just discovered that optical is better than USB on this particular unit. Is that correct? Yes, in some ways. USB will only go to 96k sample rate. TOSLink or Coax will go to 192k. This doesn't seem right. If I use my computer with JRivers and an EGO or XDA-2 I can get sample rates greater than 96k. |
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Post by vcautokid on Feb 19, 2017 17:21:35 GMT -5
How do I connect the PT-100 to my HTPC via USB instead of the optical? Just use a simple USB cable? Is it really that easy? Yes it is. From page 19 of the operators manual. 1 – digital coax (S/PDIF); 24/192k. 1 – digital optical (Toslink); 24/192k. 1 – digital USB (DAC input); 24/96k; no drivers required. So you can play from your HTPC to the PT-100 via USB with ease. No special drivers needed. |
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Post by Chuck Elliot on Feb 19, 2017 17:22:12 GMT -5
Yes, in some ways. USB will only go to 96k sample rate. TOSLink or Coax will go to 192k. This doesn't seem right. If I use my computer with JRivers and an EGO or XDA-2 I can get sample rates greater than 96k. From PT-100 specs 1 - digital coax (S/PDIF); 24/192k. 1 – digital optical (Toslink); 24/192k. 1 – digital USB (DAC input); 24/96k; no drivers required. There are no drivers for the PT-100. Class 1 USB only |
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Post by KY_Bourbon on Feb 19, 2017 19:17:35 GMT -5
How do I connect the PT-100 to my HTPC via USB instead of the optical? Just use a simple USB cable? Is it really that easy? Yes it is. From page 19 of the operators manual. 1 – digital coax (S/PDIF); 24/192k. 1 – digital optical (Toslink); 24/192k. 1 – digital USB (DAC input); 24/96k; no drivers required. So you can play from your HTPC to the PT-100 via USB with ease. No special drivers needed. So the USB would be inferior optical, no? |
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Post by Dan Laufman on Feb 19, 2017 19:50:56 GMT -5
No.
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Post by Dan Laufman on Feb 19, 2017 19:57:58 GMT -5
Are you just up-sampling on your PC in order to say you are running 192k? If so, that sounds worse than leaving the files at their native bit rate... IMO.
Are your files really higher than 96k native bit rate? Doubtful for most real world content...
The internal USB DAC in the PT-100 sounds great and most of your music is recorded at 44.1k, 48k or maybe 96k. Higher sample retries do not automatically sound better, and up converted files sound worse.
Just my humble opinion... so don't start yell at me kids!
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Post by KY_Bourbon on Feb 19, 2017 20:38:31 GMT -5
Are you just up-sampling on your PC in order to say you are running 192k? If so, that sounds worse than leaving the files at their native bit rate... IMO. Are your files really higher than 96k native bit rate? Doubtful for most real world content... The internal USB DAC in the PT-100 sounds great and most of your music is recorded at 44.1k, 48k or maybe 96k. Higher sample retries do not automatically sound better, and up converted files sound worse. Just my humble opinion... so don't start yell at me kids! Great post. Thanks. I'll give it a try using the USB. |
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Post by macromicroman on Feb 20, 2017 10:08:43 GMT -5
I think I caused confusion when I talked about the EGO and XDA-2. These units can use Class 2 USB when drivers are downloaded. I downloaded these drivers and that is why I got higher than 96k.
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KeithL
Administrator 
Posts: 10,261
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Post by KeithL on Feb 20, 2017 11:34:03 GMT -5
For anyone who finds this all a bit confusing..... USB Audio Class 1 (UAC1) supports up to 24/96k. USB Audio Class 2 (UAC2) is required to support higher sample rates (24/176k, 24/192k, and up). Both Apple and Windows computers support UAC1 without any extra drivers. Apple computers also support UAC2 without extra drivers. Windows computers require an additional driver for UAC2 (UAC2 support is expected to be added to Windows 10 soon). Many Linux versions (including the one that runs Volumio on the Raspberry Pi) support UAC1 and UAc2 without extra drivers. The USB input on our original XDA-1 supported only UAC1, and only up to 48k. The USB inputs on our XDA-2, our DC-1, and our XMC-1, support ONLY UAC2 (up to 192k). The USB inputs on our Big Ego and Little Ego DACs support BOTH UAC1 (without a driver) and UAC2 (without a driver for Apple, and with a driver for Windows). The USB inputs on the BasX TA-100 and PT-100 support ONLY UAC1 (up to 24/96k - no driver). I think I caused confusion when I talked about the EGO and XDA-2. These units can use Class 2 USB when drivers are downloaded. I downloaded these drivers and that is why I got higher than 96k. |
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Post by KY_Bourbon on Feb 21, 2017 13:12:34 GMT -5
Ugh. Tried to use the USB last night and get a ground loop hum. I have it narrowed down to the coax from the DirecTV box. I'll try to get an isolator to fix it.
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Post by KY_Bourbon on Feb 21, 2017 20:38:28 GMT -5
So I'm playing a FLAC file and JRiver is telling me that over USB the Audio Path is "resample from 192 kHz to 96 kHz". Bitrate is listed as 5285 for this file.
Would I be better off with toslink/coaxial?
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