DAC ? CAS? 我有野吾明~~
大家好!第一,我想問
PC --USB--> DAC
PC --Coaxial-->DAC
PC --Optical-->DAC
本質上有無吾同?
我自己理解係, 用usb = bypass 左 PC sound card, 音樂file 經software (eg foobar) 轉成digital signal 之後真接去 DAC 解碼
而 Optical/Coaxial 就係已經用左PC sound card 解左碼, 之後去DAC 又解一次(吾明2次解碼的分別)
如果我的sound card 好cheap,我部pc d noise 又超多, 咁係吾係應該用 usb 駁會最好?
第二,係解碼既過程, 只要吾係digital -> analog(wave), 而係 digital(file format) -> digital (singal inside optical/coaxial), 照計應該吾會有lost/noise
架wor, 就好似你save左一個 word file, 再開番, 吾應該有野吾同左架wor ? 點解d人吾係咁講呢
第三, 我而家用 hiMedia H300A --HDMI--> Onky607 放flac, 同 movie
如果我加隻 cheap cheap dac (eg topping):
hiMedia ____HDMI___________________>onkyo607
|___Optical/Coaxial__>DAC ____|
video 行HDMI, audio 行 optical/coaxial得吾得? 聽歌會吾會有改善? 睇片出吾出到5.1 ?
吾該 {:5_92:} optical-->jitter
usb--> standard win. driver 44KHz 本帖最後由 stephen915 於 2011-3-29 13:55 編輯
回復 1# Lester
首先三者都係輸出數碼訊號到dac解碼,
用usb,要睇下係咪行asynchronous(異步) usb,
如果唔係,usb有可能係三者之中最差,
而有部分dac用coaxial或aes input會好聲d,
所以邊一種介面最好,都要睇器材配搭同實際測試先知,
至於lost/noise既問題,數碼訊號都面對一個叫jitter(台灣譯成時基誤差)既問題,
當然呢個比較複雜,我都唔多清楚,
而用異步usb同加master clock係其中一些解決方法 本帖最後由 Lester 於 2011-3-29 13:55 編輯
thanks, thanks ~
你覺得我個himedia + dac 方案可吾可行? 回復 4# Lester
你而家既方法用hdmi入onkyo 607,就係由607解碼,
經optical/coaxial入dac,再rca out去607冇問題,
不過如果用太平既dac,有機會仲差過607 asynchronous...我有d明啦.
我以理解, 一般network 傳送singal 由於不用real time, 遲1秒半秒都ok, 而information 既次序又可以係終點(network card)再排過, 所以係可以有error checking, check 到有error, 可以叫個source 再send過.
但係AV就吾得,一定要real time send singal, 有錯都只可以照出個錯既singal出去
所以其實所有野都有可能有noise/lost, 只不過non realtime (asynchronous) 係可以有error correction, real time 就無.
正確? 回復Lester
你而家既方法用hdmi入onkyo 607,就係由607解碼,
stephen915 發表於 2011-3-29 14:12 http://www.post76.com/discuss/images/common/back.gif
咁我個 hiMedia 係吾係對最後出來既效果無詳影響? 反正都吾係用來解碼 回復 7# Lester
唔可以話冇,
音響真係有d野估唔到,
器材下面墊d野,器材擺機架,擺地下,機箱用料唔同都可能會有影響,
線材都係其中一樣,好似而家玩cas,亦有人話harddisk震動都有影響,
所以都係要自己試下,
另外參考下hi end果d cd player分開transport同dac,
但係transport一樣賣到勁貴,所以唔能夠話唔係解碼部分就冇影響 Sometime I confuse too. Too many device require to connect together but it doesnot mean can improve your music.
hiMedia 800B____HDMI___________________>onkyo805
|___Optical/Coaxial__>DAC ____|
why need put DAC between HiMedia and Onkyo607. you can direct connect to coaxial cable to your amplifier. Some Amp. get very good DAC chip set in amplifier . Just like Onkyo 906 is usedBurr-Brown 192 kHz/24-Bit立體聲 DAC (CPM1796). It is good D/A Converter. Sorry I cannot find what kind of Onkyo 607 DAC chip. 回復 9# kktom
無話唔得架~其實都只係睇下user既要求去到咩lvl
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