第33頁,共39頁 第一第一 ... 233132333435 ... 最後最後
顯示結果從 321 到 330 共計 389 條
  1. #321
    註冊日期
    2014-08-02
    文章
    108
    Thanks
    0
    Thanked 428 Times in 107 Posts

    預設

    引用 作者: sam0402 查看文章
    我對光華牌的排線的材質很有疑慮,所以我都自己手作了。
    其實 DigiPi 的淘寶賣家(百萬兄)還有製作這 USB 光纖隔離處理器,雖然 USB 3.0 → USB 2.0 的長芯盛 U3TT 與樹莓派 4 並不相容,但是原生 USB 2.0 的話或許是比較可靠?

    https://item.taobao.com/item.htm?id=637015014400
    http://www.headphoneclub.com/forum.p...e=3#pid5276140
    網線隔離跟USB3.0隔離類似,不同方向的信號是分離的,USB2.0隔離的原理跟3.0隔離都根本完全不一樣
    光纖USB之神奇
    http://www.erji.net/forum.php?mod=vi...ad&tid=2218628
    感受:微動態和層次感得到了全面提升,彷彿看三維立體畫看出了立體影像的那種鮮明感,聽音樂猶如開了上帝視角,各種細節盡收眼底。

    微動態之妙,沒感受過真是無法想像,百萬光纖USB讓我的系統表現說是脫胎換骨也不為過,整整提升了一個維度。彷彿拼圖拼上了最後一塊然後魔法生效了!
    底部(紫色的 BW 4)就是加上百萬兄的產品,效果跟 USB 直出(藍色的 PC)不可同日而語:

    https://www.l7audiolab.com/f/usb-5v-measurement/
    https://audiophilestyle.com/forums/t...omment-1113294


    然後把它連接到 IanCanada 的 BridgePi,再加上 Amanero384 介面就可以同時滿足 optical isolation 和 reclocking 兩個願望:

    https://github.com/iancanada/Documen...pters/BridgePi
    https://audiophilestyle.com/forums/t...omment-1108274





    另一方案(不需要 USB/沒有 optical isolation 了)就是參考 Ericcatz 兄推薦的樹莓派電源淨化板,詢問那一位淘寶賣家(蒙娜麗莎兄)可否代為製作比較優質的延長線,作為淨化版的配套元件的話對賣家來說該是問題不大吧?

    https://item.taobao.com/item.htm?id=633664880034
    https://www.mobile01.com/topicdetail...&p=44#80972227

    這是類似的 M.2 → PCIe 延長線,效果毫不遜色:

    https://audiophilestyle.com/forums/t...-music-server/
    This M.2 to PCIe convertor is another compromise. It would have been better to have a second PCIe slot. But I have tested bigger motherboards with second PCIe slot, and they did not sound better. That's why I am sticking to this well tested recipe.
    https://audiophilestyle.com/forums/t...omment-1012986
    The overall result was better than the sound I got from the AsROCK X470D4U motherboard with the JCAT NET Femto connected directly to a PCIe slot. But to improve things even more, I replaced the cable with 24AWG 5N pure silver wires with proper shielding.
    https://audiophilestyle.com/forums/t...comment-990193
    I was able desolder the ribbon cable and solder my favorite 5N solid silver wire and shield it with JSSG360 shield. If there is any audible difference with that adaptor vs. connecting my JCAT Net card directly to the PCIe slot, I was not able to hear it. But I did not really spend much time on that A/B test.
    如果還是有需要 Plan B 的話,可以考慮『沒屋頂賣場』的 Audio Reality / Yu-Studio 兄。



    最後就是關於價格方面的走勢,雖然銅並不歸類於金和銀那種貴金屬,但是隨著全球經濟復甦與及世界各國開始大幅發展綠色能源,價格只會不斷攀升:

    https://www.lme.com/Metals/Non-ferro...per#tabIndex=2
    https://www.macrotrends.net/1476/cop...cal-chart-data
    https://www.spglobal.com/platts/en/m...-2021-analysts
    Canaccord Genuity mining analysts expect Chinese stimulus to support copper demand in combination with an expected global economic recovery in 2021.

    "We now expect copper prices to average $3.50/lb ($7716/mt) in 2021, an approximate 17% increase on our previous forecast of $3.00/lb ($6,614/mt)," Canaccord said.
    Copper's long-term demand is backstopped by green energy and the push toward it, "as it is significantly more copper intensive than traditional, fossil fuel-based infrastructure," Stifel said. "We are updating our LT [long-term] Cu price to $3.40/lb ($7,496/mt). We believe a combination of short- and long-term market support in pricing."

    This was echoed by Bank of America. "Given the increased focus on tackling climate change, the focus of government spending will be worth following as de-carbonization is bullish metals."

    "Linked to that, we believe copper could once again rise above $10,000/mt ($4.54/lb) at some stage. What are the risks? Vaccine efficacy, delays to opening up economies and tighter monetary policy."
    https://orsted.tw/zh/news/2021/02/20...ability-report
    「我們必須在全球社會進行系統性且大規模的全面革新,才能創造零碳排的世界。」沃旭能源執行長麥茲尼博(Mads Nipper)表示:「我們要大幅增加綠色能源建置、加速淘汰以化石燃料為主的發電方式、在原本以使用化石燃料發電的產業拓展綠電使用,以及持續提升社會各個層面的能源使用效率。最重要的是,我們必須馬上採取行動。」
    https://tw.news.yahoo.com/全球轉向綠色能源-銅...100014237.html
    新能源車對銅的需求是燃油車的四倍,太陽能電池板和風力發電廠對銅的需求是煤、石油和天然氣等石化燃料發電的五倍。作為全球最重要的工業金屬,倫敦銅十二月十八日觸及每噸八千美元的七年高點,近幾個月已從三月份的低點攀升超過70%,推升銅價上漲的原因是庫存減少。

    目前精煉銅產量約為2380萬噸,對再生能源基礎建設和電動汽車的需求不斷增長,將推動全球精煉銅消費量從二○二○年的2340萬噸升至二○三○年的3330萬噸。

    根據已知的專案和估計的需求,並考慮到廢金屬的使用情況,預計到二○三○年將出現五百萬噸左右的供應缺口,這需要採礦業加大投資來填補。而這或許只是銅市的大多頭開始,隨著全球向綠色能源切換,對銅的需求預計將出現倍數增長。

    銅庫存缺口上一次出現如此之大的差距是在二○○五年,當時銅價漲了兩年,今年的銅企業漲幅搶眼,美國礦商Freeport-McMoRan是全球最大的獨立礦商之一,其股價今年已上漲約90%,加拿大First Quantum Mineral的漲幅超過60%,滬深股市的江西銅業十一月漲了48.65%。

    漲夠了嗎?高盛預計,在疫苗問世推動經濟復甦,二○二一年倫敦銅將挑戰每噸9500美元,然後在二○二二年上半年突破二○一一年創下的10170美元歷史高點。
    看來還是先下手為妙?

  2. The Following 3 Users Say Thank You to seeteeyou For This Useful Post:


  3. #322
    註冊日期
    2007-08-04
    文章
    264
    Thanks
    119
    Thanked 72 Times in 36 Posts

    預設

    感謝sam大, tetsuka大的分享,讚!


  4. The Following 3 Users Say Thank You to martinsun For This Useful Post:


  5. #323
    註冊日期
    2015-03-17
    文章
    128
    Thanks
    126
    Thanked 572 Times in 127 Posts

    預設

    引用 作者: sam0402 查看文章
    Raspberry Pi 4 全銅外殼 意願調查

    鑑於有樂友提出團購全銅製外殼的需求,小弟在此調查樂友們的意見,看看是否有團購的可行性。
    外殼會考慮使用以下的版本,用C110等級的全銅製作:
    https://wickedaluminum.com/collectio...at-dissipation

    歡迎樂友至下面的網址填寫表單:
    https://forms.gle/AVfrjXDFtEGCyhjG9

    沒考慮買的樂友也可以填喔!當作小弟的田野調查。
    小弟會每週公佈一次統計結果,不會公開樂友資料。
    一週了,公布統計結果:
    $2000: 11顆
    $2500: 2顆
    $3000: 8顆
    $3500以上:7顆
    共 28顆,不過 $2000有11顆,這個價位可能不容易。
    小弟可能會用30顆在台灣的廠商詢價,看看是否可行。

    使用Player 比例:
    山姆版:55.6~61.1% 有一位意向不明,只說跟隨Sam腳步。
    piCorePlayer: 27.8%
    Volumio: 11.1%
    moOde: 0%,只有零,這個我有點意外。

    使用Server 比例:
    LMS/RPi: 55.6%
    Roon: 33.3%
    LMS/NAS: 11.1%

  6. The Following 2 Users Say Thank You to sam0402 For This Useful Post:


  7. #324
    註冊日期
    2018-11-29
    文章
    4
    Thanks
    0
    Thanked 3 Times in 3 Posts

    預設

    請問一下大家,今天更新SAM大分享的最新版本,之後發生USB DAC 不管插哪個PORT都抓不到的問題請問一下大家,今天更新SAM大分享的最新版本,之後發生USB DAC 不管插哪個PORT都抓不到的問題,
    請問有人有碰過類似的問題嗎?謝謝

    Starting piCorePlayer v6.1.0 startup...
    Checking for boot files on sda1...
    Trying to mount /dev/sda1.
    ssh file found on sda1.
    newpcp.cfg not found on sda1.
    Setting default piCorePlayer repository...
    Generating sound card drop-down list...
    Loading configuration file... Done.
    Loading pcp-lms-functions... Done.
    cat: can't open '/proc/asound/cards': No such file or directory
    Waiting for soundcard USB to populate.aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    .aplay: device_list:272: no soundcards found...
    Failed to find USB (42).
    Done (42).
    Waiting for network............... Done (15).
    aplay: device_list:272: no soundcards found...
    aplay: device_list:272: no soundcards found...
    Starting Openssh server... Done.
    Starting Squeezelite and/or Shairport-sync...
    [ INFO ] Starting Squeezelite player: Squeezelite...
    Done.
    Powering off HDMI... Done.
    Starting httpd web server... Done.
    Starting user commands... Done.
    Setting CPU scaling governor to performance... Done.
    Creating static footer... Done.


    Finished piCorePlayer v6.1.0 startup.


    To setup piCorePlayer, use the web interface via a browser:
    - http://192.168.50.219


    Press [Enter] to access console.


    In the background, ntpd is syncing time between piCorePlayer and the internet.
    A large offset between 1970 and now is normal.
    [0;37;1m00:00:00.013 Warn: get lock file path: /tmp/.rnbgem0-
    [0;37;1m00:00:00.431 Trace: [childprocess] using unix child process
    Initializing
    [0;37;1m00:00:00.617 [0;37;1mInfo: Starting /opt/RoonBridge/Bridge/RoonBridgeHelper
    [0;37;1m00:00:00.656 [0;37;1mInfo: ConnectOrStartAndWaitForExit RAATServer, path: /opt/RoonBridge/Bridge/RAATServer
    Not Running (.o)
    Running
    [0;37;1m00:00:00.020 Warn: get lock file path: /tmp/.rnbhgem0-

  8. The Following User Says Thank You to satun For This Useful Post:


  9. #325
    註冊日期
    2016-07-29
    文章
    416
    Thanks
    1,702
    Thanked 1,519 Times in 390 Posts

    預設

    引用 作者: satun 查看文章
    請問一下大家,今天更新SAM大分享的最新版本,之後發生USB DAC 不管插哪個PORT都抓不到的問題請問一下大家,今天更新SAM大分享的最新版本,之後發生USB DAC 不管插哪個PORT都抓不到的問題,
    請問有人有碰過類似的問題嗎?謝謝
    satun兄您好

    請問您更新的Sam兄分享的最新版本該不會是Noel NFS這個版本吧?
    如果是的話Noel NFS原本就不支援任何音效裝置只能當成LMS來使用的。
    目前Sam兄所提供可以接USB DAC當Player用的最後版本是Noel V4。

  10. The Following User Says Thank You to tetsuka For This Useful Post:


  11. #326
    註冊日期
    2018-11-29
    文章
    4
    Thanks
    0
    Thanked 3 Times in 3 Posts

    預設

    Tetsuka兄您好,

    謝謝回覆,我是下載這包,可是解壓縮後檔案室有顯示NFS,請問這樣是使用的檔案有錯誤嗎?謝謝


    另外,小弟把Noël V4 重新打包一次,超頻時電壓有往上調,加增聲音厚實度,動態也略增一些。
    小弟之前發布的舊版本,我也不留了,V4就是PCP610終極版了。

    建議重新下載,下載點:
    https://raw.githubusercontent.com/sa...6.1.0-Noel.zip

  12. The Following User Says Thank You to satun For This Useful Post:


  13. #327
    註冊日期
    2015-03-17
    文章
    128
    Thanks
    126
    Thanked 572 Times in 127 Posts

    預設

    引用 作者: satun 查看文章
    Tetsuka兄您好,

    謝謝回覆,我是下載這包,可是解壓縮後檔案室有顯示NFS,請問這樣是使用的檔案有錯誤嗎?謝謝


    另外,小弟把Noël V4 重新打包一次,超頻時電壓有往上調,加增聲音厚實度,動態也略增一些。
    小弟之前發布的舊版本,我也不留了,V4就是PCP610終極版了。

    建議重新下載,下載點:
    https://raw.githubusercontent.com/sa...6.1.0-Noel.zip
    小弟又搞烏龍了,上傳錯了,已更新上傳。
    麻煩請重新下載。

  14. The Following User Says Thank You to sam0402 For This Useful Post:


  15. #328
    註冊日期
    2018-11-29
    文章
    4
    Thanks
    0
    Thanked 3 Times in 3 Posts

    預設

    SAM兄,謝謝回覆,我會重新下載,晚上再試試看

  16. #329
    註冊日期
    2018-11-29
    文章
    4
    Thanks
    0
    Thanked 3 Times in 3 Posts

    預設

    謝謝Tetsuka,Sam兄的協助,
    使用重新上傳的版本可以認到USB DAC順利使用

  17. The Following User Says Thank You to satun For This Useful Post:


  18. #330
    註冊日期
    2015-03-17
    文章
    128
    Thanks
    126
    Thanked 572 Times in 127 Posts

    預設

    Noël V4 量子版 發布,
    請參閱下面網址:
    http://www.stsd99.com/phpBB3/viewtop...5b260cc#p19584

  19. The Following 4 Users Say Thank You to sam0402 For This Useful Post:


發文規則

  • 不可以發表新主題
  • 不可以發表回覆
  • 不可以上傳附件
  • 不可以編輯自己的文章
  •