DSD光纖迷思~

heero503

各位大大,想請教下:

AK100ii/ 120ii/ 240...etc 個光纖可否做DSD BITSTREAM / 或者以DoP方式輸出DSD訊號去DAC到做解碼?

因為見有人咁駁去VANTAM, 但正常OPTICAL該係出PCM SINGAL ONLY, 如果AK 係自己解DSD成PCM經OPTICAL送去DAC 個邊, 其實係咪DOWNGRADE左~

上面唔係講以DoP方式傳送~
因為我見AK本說明書都講OPTICAL 出唔到DSD...
多謝指教~

Budget-fi

你要解dsd, 目前只有usb, hdmi, i2s/i2c。

另外dsd跟pcm不存在downgrade或upgrade, 只有lag機同唔lag機

t1174

"AK自己解DSD成PCM經OPTICAL" 其實 AK 會唔會咁呢? OR 是直接 播 DSD 就自動OFF OPTICAL OUT, 好像 SACD 機咁? 有沒有 CHING TEST 一下?

其實我真是唔知樓主點解有咁問題.

因為大多數燒友, HEAD-FI, 一開始也是因為想聽更好的音樂而入 HEAD-FI/HI-FI 這一門吧. 從這一個原因睇, 那這問題的答案應該為了更好的音樂.
咁貴玩 AK, 當然是為了好音樂. 用了 AK 重要加 DAC AMP, 當然是想找更好的音樂, 因為感AK 還不夠好, OR 想有其他門路. 更好的 FORMAT 雖然同更好的音樂可以有關, 但也不是必言, 因此, 用家有時就是要TRADE OFF. 而且 DSD 的原也唔見得足夠, 好多時也得聽 CD GRADE OR PCM HI-RES 的音樂.

當然啦, 人也是有好奇心, 有人買了玩了又放, 其實也不奇, 有時我們玩二手的也真是要多謝有好奇心的人. 但我想樓主真是不必有太多心思, 其實考慮一下從音樂從原頭出發, 加上 BUDGET 同物理的LIMITATION, 雖說有些大道理要堅守, 但好多事情處理彈性一點, 有多試不同的路的想法, 那方是活得開心.

dezispop

多口問句。

光纎係咪最多只出到pcm 24bit/192khz?

另，如果想玩portable DAC, 用光纎，DAP做source, 係咪求其hea買一部DAP optical out就ok?
(Post76 Android 手機版送出)

t1174

http://en.wikipedia.org/wiki/TOSLINK
WIKI DATA 說原本 MAC 是48/24 ONLY, 不過後來 EXTEND 到"support all modern formats", 不過是要出品公司 SUPPORT
Bitrate         Originally 3.1 Mbit/s; now 125 Mbit/s....125MBitDXD 也夠了 (WIKI 說 DXD data rate is 8.4672 Mbit/s per channel )

rayjolee

以我理解，
1. 光纖出"DSD"，係用dap粒dac解碼, 個dac amp冇做解碼, 只做放大.
2. 用usb出"DSD", dap係完全冇解, file直入 dac amp做解碼, 而native 定 DoP都有所謂.

而用1, dap及dac的各個部份對音質都會有影響.
用2, dap 只有速度問題, 對音質冇影響, 音質全看dac amp.

請各師兄指正.

ericcklau

我都有同樣既迷思, 本人用VANTAM 加 OP AMP MUSES02, 最初是用手機用ONKYO APPS DOP 去部VANTAM, 音色細緻 有空間感 但細聲D, 現在買左二手AK100光纖出VANTAM, 發覺聲大左但音色同空間感都差左少少. 唔知是否心理作用定是真實有分別?

CosmicHolyGhost

just use foobar to embed the DSD (dsf or dff ) files  in FLAC and send using DoP over Toslink/Coaxial...it is a workaround... whether it will stutter, it depends on how powerful your DAP is.... AK240 should be fine. Bear in mind, those files are not playable by the DAP only... you must connect to an external DAC/AMP that accepts DoP... pretty standard stuff

http://www.audiocircle.com/index.php?topic=119364.0

CosmicHolyGhost

If you dont convert the DSD files using Foobar , the AK players can convert the DSD to PCM 24/176.2.. and send as PCM over toslink...
some people dont like the conversion done by AK, some people think it is fine and hear not much difference... You need to trust your ears and gear to listen if you could hear the differences.... and see if you need the DoP bitstreaming or can live with the DSD to PCM conversion by AK..
There is no magic formula or golden rule to sound quality as we use different earphones, cable, source files, DAC performance in PCM/DSD, ability to discern differences and our point of reference.....

rayjolee

CosmicHolyGhost 發表於 2015-5-28 14:41
just use foobar to embed the DSD (dsf or dff ) files  in FLAC and send using DoP over Toslink/Coaxia ...

This article is to solve the problem that Logitech Squeezebox Touch cannot play DSD native.

I think people here seldom use this stuff.