@@ 沒有看到聽感分享 不想肉包子打狗阿

這東西應該是講究用的吧
傳輸沒錯誤，非同步USB DDC應該不會有人耳可鑑的差異
電腦軟硬系統太差的話應該幫助很大

是說，如果電腦軟硬系統太差，應該先想辦法解決源頭問題吧 :ase

數位的東西要的是正確+準時
正確方面，只要解出來正確就好，沒有更正確這回事
說010101比010101更正確應該會被打吧XD

隔離電腦的電源對正確來說是有幫助的

準時的話，非同步加減可以搞定不少問題

連結內文有聽感阿，全面提升更明確更聚焦更少數位味balabala

The overall impression is one of more clarity, despite my systems producing more than acceptable clarity without the iPurifier2. But it is easy to detect, from the top end to the bass, everything sounds better defined, and more focussed. The better focus is particularly noticeable with instruments like cymbals. In fact, on one track that I listened to, I realised that a tiny sound that I had always heard before, but not really thought about, was clearly finger cymbals. Guitar strings, that I thought already sounded 'clean' were even more so, and bass lines were also better defined. Castanets had more 'snap' to them, and drum kits were similarly improved. I also noted better defined space between instruments and voices. On tracks that employ Q sound effects, eg Roger Walters and Deep Forest, those effects were also better defined. Last, but not least, the whole system sounds slightly less digital. With everything in the sound stage slightly more discernible, the impression of depth was reinforced.



另外下面這位作者有測試schiit wyrd，在非同步DAC也是有效果
http://firev1.blogspot.tw/2014/11/s...es-it-work.html
Somebody has asked me whether the Wyrd would work with Asychronous devices, the answer is a firm yes. Reduction in spurious artifacts.

這個嘛，請他量個SI就知道了，講這麼多只是想推個低成本的產品.... :jolin:

這個是xtreme兄自己量的眼圖嗎@@? 圖有點小看不太清楚，不過右邊的看起來是fail，不知道有沒有加上mask的圖

另外目前USB receiver都是吃USB 2.0的，應該量2.0的訊號吧 :confused:

:cry: :cry:
我買了類似的產品
電光火石 綠鑰..
目前概略的試一下....無感...
:think: :think:

別人量的
2.0跟3.0都差動訊號，Repeater放接收端效果好可參考


綠鑰
電源ADuM5000(輸出只有100mA)跟訊號ADuM4160(只支援USB1.1)
比那個實在多了
無感只好賣給需要的人了

反正先插著
當小夜燈用.... :rolleyes: :rolleyes:

昨天晚上終於裝了ipurifier2，很不幸地.............:think:
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ESS DAC晶片有一個DPLL Bandwidth 功能，可以調整I2S鎖定頻寬
一般只會開放第一段lowest到第七段highest讓user選擇


設得越寬訊號越容易鎖定，但是源頭的jitter也會被帶入到輸出，導致聲音模糊
相反地
設得越窄訊號越難鎖定，頻寬外的源頭jitter會被抑制，聲音會更聚焦

再來關於非同步USB DAC，有些人說非同步DAC jitter與電腦無關，線材、主機板、擴充卡、HUB，都不影響，jitter產至於DAC內部的非同步USB controller

我的非同步USB DAC，USB晶片不吃5V，USB輸出I2S還經過隔離IC
一切看似完美應該不受jitter影響
真的是這樣嗎?剛好我的DAC是ESS晶片，透過DPLL很簡單就可以驗證

中等擴充卡+爛線+工業級HUB，DPLL設4段穩定
中等擴充卡+SUPRA線+工業級HUB，DPLL設3段穩定
PP2U-E擴充卡+SUPRA線+工業級HUB，DPLL設2段穩定，1段運氣好時可以聽完一首歌

實際上jitter就算經過非同步USB晶片處理後還是會影響I2S :nonono:

講了這麼多回到正題就是.....裝ipurifier2後...............................
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冷機熱機設 1 段聽了好幾個小時，完全沒問題 :laugh:

聽感就是全面提升更收斂聚焦，分離度與定位更好，音樂更鮮活

水喔水喔 :yeah:

是說PP2U直接輸出不透過hub的效果如何？一樣可以level2 stable還是要開到Level 3~4 :confused:

我的電腦不透過hub線不夠長，效果如何是個謎 :laugh: