USB-S/PDIF トランスポート比較表

概要

これらのUSBからS/PDIFに変換する人気のコンバーターの機能・性能について比較してみましょう。

Audiophilleo 以外のほとんどのメーカーは ジッターの明細や性能値を公開していません。 評価といえば、レビューやフォーラム投稿など、第三者によるものとなります。 価格は(高価になることもある)ケーブルコストを含みません、また。 商品によってはオプショナルでリモコンを含みます。

RMS周期ジッターと統合位相ジッターでは、異なるタイプの計測となり、数値は直接比較できるものではありません。 統合相ジッターの計測の方が重要となります。 尚、装置間の比較を正確に行うには、帯域幅の明細が必要となります。記載された各装置について脚注をご覧下さい。

記載された各装置について脚注をご覧下さい。

  • 10 Hz から 100 kHzに統合された2.6 ps RMS 位相ジッター。これはTSC 5120A位相雑音分析器を使用して測ったものです。
  • 1 Hz から100 kHzに統合された8 ps RMS位相ジッター。これは TSC 5120A位相雑音分析器を使用して測ったものです。.
  • < 5 ps RMS周期ジッター （< 15 ps ピーク-ピーク)　これは8000サンプルサイズのWaveCrest DTSを使用して測ったものです。

Comparison matrix

Audiophilleo Audiophilleo1 Audiophilleo Audiophilleo2 Bel Canto USB Link Emprical Audio Off- Ramp cryoparts Sonicweld Diverter Analog Research Technology Legato Trends UD- 10.1 and Hagerman HagUsb Musiland Monitor 01 USD Weiss INT20210 Stello U2 and Lindemann USB-DDC M2TECH hiFace M2TECH Evo KingRex UC-192 Emprirical Audio Pace-car 2, SC4 for 44.1 & 96
  1. As measured by Wavecrest DTS jitter analyzer with and without included cable attached to CambridgeAudio DacMagic.  The Stereophile Bel Canto Test came up with 1700 ps RMS phase jitter 50 Hz to 100 kHz, and head-fi shows more values for other devices (all over 1000 ps)
  2. The CS8406 specifications lists 200ps as the jitter spec, so it is not surprising that the Bel Canto USB Link has 200ps jitter. This device is also single ended, not differential.
  3. Empirical appears to license the CEntrance firmware according to their list of clients. Centrance uses the adaptive USB mode in which the PLL in the USB receiver adapts to the clock rate from the computer's USB output.
  4. Under Windows, OSX, and Linux the standard driver is used.  Under Windows our custom driver can be used to achieve 192/24.
  5. Standard Windows driver only supports 96/24.  The OSX and Linux standard drivers and our Windows custom driver support 192/24.
  6. Based on feedback from the manufacturer.
  7. The PCM2704 is a single chip off-the-shelf design from TI and represents the low end of the market. We did not perform any tests but jitter should be significantly more than 200ps RMS.
  8. All devices provide Windows and Apple OSX support. 
  9. Based on reviews such as this one on Audio Asylum, this device performs very poorly.  It appears to be so noisy that some DACs can't even lock onto the SPDIF signal.
  10. The INT202 uses firewire instead of USB. This is equivalent to using Asynchronous USB mode. This product is included in our list since it serves the same purpose as the others, except that it has features such as XLR and firewire that are geared more towards pro audio. Other than this the design appears to be similar to the other devices (transformer output, non-differential output stage etc).
  11. As measured in May 2010 Stereophile magazine review. Please read review for technical details and jitter testing methodology. Note that the AP tester used for this review as at its noise limits, so actual integrated phase jitter of these devices may be lower.
Price $949 $579 $249 $699-$1579 $1299 $500 $199/$129 $75 $1885-$2185 $349/$650 $180 $499 $189 $1850
RMS jitter 2.6 ps RMS phase jitter 10 Hz to 100 kHz.
< 5 ps RMS period jitter.		 2.6 ps RMS phase jitter 10 Hz to 100 kHz.
< 5 ps RMS period jitter.		 190 ps1 RMS 600 ps p-p period jitter not specified not specified not specified not specified see footnote 9 not specified Unknown period jitter. 395/444ps phase jitter 50Hz+11 45 ps RMS period jitter, unknown phase jitter (see hiFace signal for more info) 200 ps RMS period jitter, unknown phase jitter 500 ps RMS period jitter, unknown phase jitter 50 ps RMS period jitter, unknown phase jitter
Hardware Custom designed Custom designed TAS1020
CS84062		 TAS1020 not specified TAS1020 + custom6 PCM27047 custom not specified Tenor TE7022L Custom designed Custom designed not specified not specified
Firmware Custom designed Custom designed CEntrance CEntrance3 not specified custom6 none custom not specified not specified Custom designed Custom designed not specified not specified
Differential Output Stage yes yes no no not specified ? no no no no no no not specified not specified
Fixed frequency clocks yes yes no yes not specified yes no no no no yes yes no yes
Max SampleRate 192/245 192/245 96/24 96/24 96/24 44.1 48/16 192/24 192/24 96/24 - no 88.2 support 192/24 192/24 192/24 192/24
Asynchronous USB (master clock in device instead of computer) yes yes no no no yes no no  no
(Firewire) 		no yes yes no no
Driver Both4 Both4 Standard Standard Standard Standard Standard custom custom Standard custom custom custom N/A
Connector BNC + adapter BNC + adapter BNC Both BNC BNC Both Both No BNC. RCA+XLR. RCA BNC or RCA BNC or RCA RCA RCA
Direct connection yes yes possible no no no no no no no possible no no no
12V Trigger yes no no no no no no no no no no no no no
BitPerfect testing yes no no no no no no no yes no no no no no
JitterSimulator yes no no no no no no no no no no no no no
VirtualCable yes no no no no no no no no no no no no no
Remote control yes no no no no no no no Gain and absolute polarity no no no no no
Linux8 Compatible yes yes yes yes yes no no no no no no no no yes
Satisfaction Guarantee yes yes no no Partial Refund no no     yes
Trends  Hag		 no no no no no no no
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