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發表於 2024-12-26 19:50:19
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呢個 post 令人諗起 5 年前嘅聖誕，WBF 嘅 Roy 師兄都有提起其實 CAS 所扮演嘅角色比 DAC 更加重要：
https://www.whatsbestforum.com/threads/taiko-audio-sgm-extreme-the-crème-de-la-crème.27433/page-109#post-617470
https://www.whatsbestforum.com/threads/taiko-audio-sgm-extreme-the-crème-de-la-crème.27433/page-110#post-617581
https://www.whatsbestforum.com/threads/taiko-audio-sgm-extreme-the-crème-de-la-crème.27433/page-111#post-617614
Edward Hsu 嘅其中一個 post：
https://www.whatsbestforum.com/threads/taiko-audio-sgm-extreme-the-crème-de-la-crème.27433/page-62#post-601040
https://www.whatsbestforum.com/threads/taiko-audio-sgm-extreme-the-crème-de-la-crème.27433/page-107#post-617381
https://www.whatsbestforum.com/threads/taiko-audio-sgm-extreme-the-crème-de-la-crème.27433/page-148#post-630680The experience of X-Fi in September 2019, and now Bristol Hi Fi tell us that the RF emission signature of the Extreme delivers to the playback chain a sonic presentation which can be enjoyed with modest electronics and speakers.
The tonality of parts from Mundorf , Dueland and others shines through even when the electronics are just competent
It really makes one think about allocation of budget to the components in the signal chain
Matthias’s “source first” Mantra gets my vote !
所以真係有「大細超」嘅實例，SGM Extreme 用家搵一部十成功力嘅 Chord Mojo 2 再加埋 PGGB 就隊冧咗佢大佬 Chord DAVE：
https://www.whatsbestforum.com/threads/qsa-lanedri-series.36078/page-26#post-924321It started with Taiko, that hinted that the DAC ultimately doesn't matter so much (10-30% according to Emile) once you get a uber-low noise source. Especially true if you pass the DAC filter by offloading the upscaling (PGGB another key component here, several million tap at 256 bit precision, not something you can or want to do in a DAC in real time!). A different take, different continent, but Dan Mance from Audiowise had been advocating for RF/EMI pollution as a key limiting factor for years, and made the fantastic discovery that a Chord Mojo2 with the latest Rob Watts crown achievement FPGA, at 104 bit resolution for noise shaping (he has provided a true gift to the masses here, putting a new revolutionary FPGA in a miniature device that comes at the lowest point of the price chain), ultra-low power (you have to see the size of this thing!) and running on battery, actually beats (by far I have to say!) a Chord Dave. This involves some engineering as well, eg bypass USB with SRC-DX, and the typical Chord-like quirks. Shielding this with Mu-metal for magnetic screening also helps, and Dan now has a cool technology on filtering RF with skin-effect to avoid inducing extra losses in the chain (a review on this soon at as I am awaiting Dan's new tech).
http://forum-hifi.fr/thread-34957-post-821418.html#pid821418
https://audiophilestyle.com/forums/topic/70424-gustard-x30/#comment-1296042The Gustard X30 on its own is impressive, likely very close to the Holo May in performance.
However, the careful setup I’ve implemented for the Holo May—with offline upsampling and clocking via the DST-0—allows it to maintain an advantage over the new arrival, especially in the realm of emotional rendering.
http://forum-hifi.fr/thread-27274-post-811034.html#pid811034
http://forum-hifi.fr/thread-27274-post-811063.html#pid811063
本意唔係幫硬件賣廣告之類嘅無聊嘢，話唔定 Diretta MemoryPlay 同埋 PGGB 呢兩隻 CAS 軟件好有可能係真正嘅幕後功臣：
https://www.aliexpress.com/item/1005006417238193.html
https://www.aliexpress.com/item/1005007020721540.html
https://www.aliexpress.com/item/1005007500692467.html
https://www.aliexpress.com/item/1005007557892774.html
https://www.mouser.com/ProductDetail/501-R284C0351004
https://www.mouser.com/ProductDetail/523-135101-04-M0.50
同樣播放未升頻嘅 native rate 檔案，Olympus 加埋 XDMI DAC 可以話係大勝 SGM Extreme 經 USB 出去 Vinnie Rossi L2 DAC。
但係當後者用 HQPlayer 5 Desktop 播放（PGGB 升頻）DSD512 嘅時候，佢同前者嘅之間嘅距離就明顯變得無咁遠。
（大前提係為咗玩高質素 DSD512，於是乎 SGM Extreme 先至會讓半臂無用到 XDMS/NSM。）
不過 Olympus 啱啱出世無幾耐，擺到明佢仲有唔少進步嘅空間。家陣用 Roon 播放 DSD512 真係只會弄巧反拙，哈哈。
所以結論就係，假如真係捨得花多少時間去鑽研 CAS，只要一部平平無奇嘅 DAC 有提供 NOS 選項，或者預算方面相對有限都一樣有唔錯嘅表現？ |
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