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  1. #51
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    引用 作者: john925 查看文章
    Linn目前有支援Airplay,所以"理論上"應該可以送高解析到La Rosita,這樣應該就與itune脫鉤了...
    非也,

    其實真正的狀況是,AirPortExpress裡的那個(記得應該是)Broadcom的IC只能處理44.1/16
    而La Rosita不只改軟體,也改硬體,才能跳過這東西

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  3. #52
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    今天有位站上的發燒友來找小魚

    他說之前在音響展聽過所有的DAC

    只有對Rosita的聲音滿意~~~因為Rosita豐富而飽滿的音色,像極了黑膠唱片~~~
    音場廣且深!


    而今日來訪之後 更是讚不絕口~~~

    (國內音響雜誌編輯最近也都不斷跟代理商反映說 他們聽來聽去 就最愛Rosita!)

    這讓身為推廣者的小魚 深感欣慰!

    希望可以讓更多人了解Rosita的好聲與便利!

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  5. #53
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    Rosita老闆 DB,給大家的訊息~~~請詳閱就會知道為什麼推薦使用Wi-Fi來做傳輸!

    In fact many equipment data sheet show that a lot of machines and other USB DAC type can 24/192 reproduce through an USB connection, Ethernet or Firewire. See advertising ....
    WARNING! let us not take for donkeys as the "jitter" ultra low which was supposed to guarantees the quality of a DAC.....
    About you to connect your computer to a HD DAC you MUST KEEP in mind the principle that "digital noise floor of your computer" can't be over passed.
    24bit/96kHz is a dynamic of 146 dB or a noise level of -146dB !
    Computers are unable to, (far from it), work with a lower digital noise that 90dB. that's what looking for people who use measuring instruments based on computer motherboards. The motherboard can not do it because of the noisy power supplies necessary to computers. (High Frequency power supply)
    The absolute record is close to (-140dB) and is achieved by using oscilloscopes motherboards specially dedicated. (Eg: LeCroy) We are equipped.
    As also distributors of Audiomatica CLIO measurement system, we face the problem regularly. http://www.audiomatica.com/europe.htm
    A link RJ45, USB 2.0, FireWire put unfortunately the computer and the DAC at the same ground potential (bonding modes common) and even though the guts of the machine could do digital audio only TRUE WIRELESS happen to reproduce levels of "digital noise" so low because the connection has no physical contact with the computer. It'easy to make a 24bit 192 kHz USB DAC, look..... http://cgi.ebay.fr/ws/eBayISAPI.dll?...84.m1438.l2649
    We remain very committed to wireless because it is in our opinion, the ONLY current solution to meet at least the -96 dB of the CD! what is already an achievement ...
    to the wise ....
    friendly yours Dan Bellity

    數位底噪與Jitter都是目前電腦音樂最大的殺傷力!
    Rosita 完整的解決這兩者問題 所以聲音可以這樣的迷人!


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  7. #54
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    我正在享受 ZETA,這麼極緻的DAC居然沒有引起熱烈瘋狂搶購...........:P

    打算寫一篇評論,但是不會都只說好話,因為 La Rosita崇尚的 airplay 依我看問題真的很大;但是如果不考慮辛苦的CAT調整或優化,只談直接把電腦或IPAD接上AIRPLAY,那麼 zeta 真的是『普通的電腦性能,超強的dac性能!』,這也造成使用 mac itunes 一定 >> pc itunes,而且,使用 ipad 的播放都 > pc 的itunes。

    偏偏原廠不肯提供 數位輸入 的純 dac功能,討厭啦!否則四萬多元的純dac我這筆錢一定買下去!!

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  9. #55
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    今天試聽了 Synology ds211+ => usb 無線網卡 asus usb-n10 => airplay 到 La Rosita zeta,當場昏倒......(sweat)

    當然還是『遠比不上』我辛苦研究的超值且極緻的 CAT + 樂之邦 03USD 啦!但是,查了一下只要伍仟元左右的 DS112J 就可以支援 AIRPLAY,網卡不到400元,加上 ZETA 才不到五萬元,就可以得到這種成果,會讓我覺得玩CAT有點不好混了!那一天 JPLAY直接支援AIRPLAY,我辛苦研究的USB方案就要全部毀了.....;(

    因為一直有頂級的 CAT+JPLAY 或 GOLDWAVE 當成對比,所以我非常肯定了:至少以 Synology ds211+ 這種 linux式的 NAS 來說,AIRPLAY 的聲音正確性遠大於自身的 USB 外接 DDC,至少就狠剁了 TE7022L,『猜想』 XMOS 的應該也活不了。可惜無法測試樂之邦這種 XILINX 的最高等級晶片。

    我在猜,AIRPLAY 基本上不需要依賴 CAT端的性能,所以 NAS的電腦性能很差不影響AIRPLAY,卻嚴重拖累了USB DDC。但是NAS是遠比任何精簡化CAT更精簡的OS、更精簡的CAT,所以背景躁音與JITTER都比CAT小很多,再加上AIRPLAY又把電氣雜訊徹底隔絕了,才可以讓 NAS+AIRPLAY 狠剁任何膽敢不使用JPLAY的 CAT。如果使用我玩CAT的瘋勁,狠狠把 NAS的電源改成線性、無線網卡外接電源、內部線材升級、硬碟改成SSD.....說不定會有更可怕的效果!

    目前JPLAY派的CAT就是完全靠著 JPLAY 此一無敵播放程式在撐了,因為連我的頂級CAT+偉大的USB2.0解決方案+最高級的DDC 03 USD,只因為使用GOLDWAVE,就被 NAS+AIRPLAY 打好玩的;沒有JPLAY 的CAT,玩不下去了!

    請問小余是否試過:不同CPU等級的 Synology NAS、不同價位,AIRPLAY 到 LOSITA 的結果有差嗎?如果沒差,我要直接向你購買一台 DS112J 回家研究了!...

    現在討厭的是,NAS 的 USB 外接 DDC 先天不足後天也失調,我絕不會使用!但是偏偏它是極佳的 AIRPLAY 解決方案!我是沒有聽過 MAC播放,但是以過去的經驗,如果沒有安裝 LA LOSITA PLUGIN 的 MAC ITUNES,應該不會是 NAS 的對手,因為 IPAD 的 AIRPLAY輸得很慘很慘耶!....:P 這下子為了玩電腦訊源,還得要準備一CAT台專門玩 USB DDC,一台CAT專門玩 AIRPLAY,這,不是整死我自己了?....:O
    此篇文章於 2012-06-24 04:03 AM 被 psycho 編輯。

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  11. #56
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    http://www.larosita.fr/Rosita/Blog/E...rplay.....html

    AirPlay HD 音樂的時代來臨... Rosita 已經為下一代的 MAC OSX 準備好了!!!





    La Rosita Blog






    Mountain Lion et Airplay....



    «Apple has just demoed a new AirPlay Mirroring feature that can be used to easily push 1080p content wirelessly to your TV from your Mac running the upcoming OS X Mountain Lion. This means no more fiddling with an HDMI cable to get the same result. Audio can also be mirrored this way to AirPlay-enabled stereo systems and speakers.»

    En direct de chez Apple:

    Le nouveau système d’exploitation d’Apple: Mountain Lion Generalise la transmission sans fil et réduira au rang de l’inutile tous les cables allant même jusqu’au récent HDMI.
    Chaque terminal déporté Apple, désormais équippé d’un système WiFi BiBand, sera à même de transmettre sans fil l’image en HD mais aussi le son en HD...

    Nous venons de terminer la mutation vers cette nouvelle technologie et les Rosita sont désormais prêtes à devenir des cartes «son» déportées et de reproduire tout ce que la carte mère des ordinateurs peut traiter.

    Nous irons au delà de la HD, nous atteindrons ainsi la THD (Très Haute Définition).

    Les nouveaux bridges Apple font merveille au sein des Rosita et même sur des fichiers « son» actuels que nous connaissons bien. La dynamique et le naturel ont encore fait un bond.

    Retenez votre place et soyez parmi les premiers à pouvoir écouter de la HD sous n’importe quel format en réservant votre place dans le temps que nous avons prévu pour les mises à jour.

    Chaque machine Rosita pourra recevoir un module V3 adapté à son modèle.

    1 module Zeta, Alpha.............190 euros
    1 module Alpha+....................279 euros
    1 module BetaNew.................349 euros
    1 module Omega et Pi........... 470 euros


    Les modules vont arriver au compte goutte. Profitez des congers pour faire réaliser vos mises à jours

    Dan Bellity





    mercredi 4 juillet 2012












  12. #57
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    我竟然花時間把德文論壇超夯的討論串都看過一輪了...
    Rosita 在德國可以說是旋風式的襲捲並洗牌所有的"知名品牌"DAC....

    http://www.open-end-music.de/vb3/showthread.php?t=3395

    http://www.hoerspass.net/forum/forum...p?86-La-Rosita


  13. #58
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    疑難解答時間^^

    Q1: AirPlay 的限制與破解


    A1:

    http://amiexp.blogspot.com/2011/11/a...with-2496.html

    這邊有發燒友對AirPlay的限制做測試的文章
    簡單結論如下


    iTunes輸出時就自動把任何格式都壓成16/44.1k的ALAC格式做傳輸,
    到AE端做ALAC decode。
    http://alac.macosforge.org/trac/brow...escription.txt
    但是如果是想辦法丟給AE高解析檔或是無損無壓縮,
    並且不要用AE本身的DAC晶片去解碼,是可行的!!!

    必須從兩方面下手

    1.播放面~需要繞過iTunes...等Apple內建的AirPlay方式,用第三方軟體送資訊出去。

    ex: Linux (nas)上的第三方軟體、Rosita Plugin...等。
    http://www.larosita.fr/rosita/Blog/E..._la_HD....html

    2.硬體面~需要能解碼高解析的DAC晶片與獨立的時鐘。
    http://www.larosita.fr/rosita/Blog/E...es_Rosita.html
    Rosita 內的DAC晶片與Bioclock支援到 32/384


    Q2:AE或是APPLE TV 或是Rosita的Digital Out 為何只有16/44.1(48)?

    A2:
    這並非技術上不可行,而是著作權法對於數位音樂的法令保護!!!
    http://www.larosita.fr/rosita/Blog/E...%27auteurs.pdf


    Q3:AirPlay只能透過iTunes(Mac、PC) 或是 iOS 輸出嗎???

    A3:
    像NAS就已經做到由Linux AirPlay,
    PC、Mac也可以透過其他軟體來AirPlay所有音訊
    http://rogueamoeba.com/airfoil/


    而MAC 山獅系統也已經能把AirPlay裝置當作音訊輸出裝置,就如同USB DAC的使用方式一樣了~不用再綁定iTunes。
    http://www.larosita.fr/rosita/Blog/E...iTunes....html



    Q4:為何說16/44.1就夠了?不是這樣的吧?!


    A4:詳情請參閱
    音樂產業的真實內容
    http://www.larosita.fr/rosita/Blog/E...marketing.html

    16/44.1 24/96?!!!!
    http://www.larosita.fr/rosita/Blog/Entrees/2012/7/16_En_1988.html

    http://www.larosita.fr/rosita/Blog/E...efinition.html

    當然 為了迎合市場的需求以及新錄音數位檔的需求,
    還是需要做到通通都可以解碼囉....
    http://www.larosita.fr/rosita/Blog/E..._la_HD....html

  14. #59
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    http://www.larosita.fr/Rosita-2013/P..._concepts.html

    La Rosita




    Explanation About la Rosita


    La Rosita is Wireless Musical Player that connects straight to your Hi-Fi. NO MORE CABLE!

    You control your music and iTunes without moving.
    The music is stored on your computer after ripping. No data are missing, everything is there. As all the conversion from digital to analog happens it one chips, there is no jitter.


    WHAT ARE THE DIFFERENCE BETWEEN ALL ROSITA’S MODELS:

    DIGITAL NOISE FLOOR / you never miss anything anymore!
    One difference between the Rositas is the ‘’ Digital Noise Floor ’’. You need to consider it as border that signals, will never be able to cross.
    How lower is your digital noise floor, how better you will hear the details of music. La Rosita is extremely low. It brings out the micro-details that result in softness and warmth.
    A digital noise floor is not a stable line. It is constantly changing up and down like the sea level. That is why it is important to have it at the lowest level as possible. This way, more details, nuances, fineness and subtleties of the music will be available. The average CD-Player will have a digital Noise floor of -70 to -80 db. You miss 20% of the possibilities of the CD recording. The best CD-player ever produced in the world was -93dB. You still miss something. The Beta New will have -102 dB and the Pi, more than -105dB.
    With LA-ROSITA you never miss anything anymore!

    NUMBER OF CONTROL IN POWER SUPPLY
    Another difference between Rositas is the level of control of the power supply.
    The Beta New has 2, The Omega has 3 and the Pi has 4. More control of the power supply will translate in more softness, more energy, more responses. This means all the sound will pass with all the energy they really need.
    In term of music, especially on piano and violin, you will hear the attack of the musical note very sharp at it is and note softened.

    INSTANT FULL ENERGY SUPPLY (IFE®)
    A patented power supply, IFE® type (Instant Full Energy®), capable of producing unlimitedenergy without inertia. We could compare it to a car that will never have to switch gear to change speed. At any time he will have enough power to reach any speed needed effortlessly.
    Another image will be a sport man without short of breath whatever the condition or the field in which he is running. The Pi has the IFE and the Beta has a lighter version of it.

    THE PI, THE ULTIMATE VERSION.
    The Pi was made with one idea in mind: no compromise and put the price issue on the side. The PI uses not only the best components, but all components are matching with the other and chosen in matching pairs. Every single component is tested and measured one by one to find its perfect pair. Everything was build to make sure we reach the best level possible in sound reproduction ever matched before.
    In addition, a deeper work on all the output stages and a unique treatment called DFTA® (Direct Frame To Analog). This devise give the ability to the PI to adapt, fit itself to the next level, the PRE-AMPLIFIER and AMPLIFIER it is connected to. It analyzes the charge of the next devise and it put itself at the same level. In other words, it puts itself in the best condition for amplifier to work in total harmony with it.

    There are some more difference between the 3 Rosita:

    a) Beta, Omega and Pi have a digital output so that you could use it with your own DAC ( Digital to Analog Converter) if you like. Pi only, has 2 kind of digital output available, SPDIF Single ended 75 ohms, and AES/EBU 110 ohms .

    b) Pi has a XLR analog output. It is an option for the BETA and for the OMEGA.



    OTHER THING ABOUT LA-ROSITA
    La Rosita is the achievement of 8 years of research and tests; and 35 years of audio experience and music passion.

    All Rosita have no jitter. No Jitter means, the music is never tired, it come straight to your brain, you can listen for hours and hours, you will never again want to change the volume level or switch to another music.

    La Rosita has been conceived to respect the TEMPO of the music.
    When we proceed from Analogical to Digital, it was a great step forward for audio but also a step backward for the music reproduction.
    The reason for this. ALL digital devises need a time base (Oscillators) to rebuild sound from digital file. The music itself is built on time base, which is the cadency, the tempo. When you put two time bases over each other, inevitably you degrade (Lower) one of them. The one of the electrical circuits cannot be altered otherwise you take the risk that the devise will not work. So, it is the tempo of the music that will be damaged. LaRosita has succeeded to avoid this dilemma and there is no more compromise. It respects the tempo of the music. This one reason the music sound so fluid and pass with ease.


    Another advantage of la Rosita. Simple is more functional.
    Today, we now know that a clock signal will undergo more temporal strain (distortion) on a circuit path of 30 cm than an analog signal would be over 30m !
    So, the idea was to reduce the digital signal path length so that it will never be distorted. The only solution was to move from digital information to analog information without leaving a single and same processor. All the Analog Digital conversion happens in a single chips the size of a 1€ coins.
    In a traditional setting of digital reading and digital to analog conversion, the multiplication of transport and transformations that signals have to pass trough cause degradation of the musicality.
    In LA ROSITA, the information is translated from a state of raw network data to a state of musical signal in a SINGLE component!!! The incredible reduction of the path of the digital signal is essential in the preservation of the musicality and to avoid any jitter issue. In addition there are no loss of insertion (passing from components to another). Everything happens in a unique and single component, the size of a 1€ coin!)


    Similarly, as the signals (digital and analog) do not pass through long paths, they are not tainted with losses by insertion (#1) or by jitter and distortions
    (#1) At the junction of the welding there are losses. The welding of the metals together creates this problem. And different metals give different color to the music. Since all is one chips, there are no more losses by ‘’ insertion’’, you don’t have two metal mixed with a third one. You have a real electro fusion. This is a fundamental advantage. LA ROSITA is totally neutral and don’t add any color to the music. What you get is what was recorded. One reason why the Pi is the choise of some Studio Recording to play their music.

    In comparing A / B source, the more neutral and more true unit still appears to be more dull because it does not include any artifice (contrivance) but eventually, when listening the ROSITA for full music pieces, the desire to switch, to lower the volume or simply to change the CD does not exist anymore.


    To fully appreciate a Rosita, you just have to listen and only listen to music that carries emotion to be able to recognize its high musical qualities.

    There's nothing like La Rosita in its ability to capture and to relay emotion, melody, the musical flow and its fluidity. This is probably the first time that we found with a digital devise the accents of both the analog and the vinyl This because of our proprietary Algorithm for DtoA reconstruction based on Lagrange Transform and done by a very advanced DSP system.


    Once you have a ROSITA, you just enjoy the music for the music and you have the right devise to reproduce music as its was recorded








    As you can see here is our new moulded V3 module.

    (left picture) Composed of 2 multilayers circuits boards (Right picture). On the top (black) Airplay bridge original Apple® for best compatibility with iTunes® and just below, our own DSP board (green) linked to the Apple’s® bridge including our own DSP engine and our exclusive D to A Algorithm based on Lagrange transforms (Tempo®). On the same board, our original BioClock® and our IFE® ful linear power suply for all various DC voltages needed.

    All Rosita’s streamers models use this module with various levels of Algorithm based on Lagrange transforms, BioClock®, IFE® power suply and our Activ/Passiv A Class single ended output stage called DFTA® (Direct Frame To Analog). ( an Iron Hand in a Velvet Glove)

    All firmware upgrades can be done at any time.

    Hardware evolutions, are simply done by moulded module replacement!

  15. #60
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    幫小魚把重點翻譯一下,內容我編輯過,只翻譯大家對瞭解數位播放有幫助的部份,以及Rosita一些獨門的地方

    數位底噪/你再也不會錯失任何東西

    Rosita與眾不同的其中一項特色是極低的數位底噪。底噪對訊號而言就像是圍牆一樣,永遠不可能穿過。數位噪訊月低,你能聽到的細節越多。Rosita的數位底噪極低,它獨特柔軟又溫潤的聲音就是精準反應「微」細節的成果。數位底噪不會是穩定的,它就像是海平面一樣不時高高低低。因此讓它盡可能地低是很重要的。如此一來,更多的細節能夠被呈現。一般的CD播放機的底噪大約在-70~-80dB之間。你很有可能損失多達20%存在錄音中的細節。世上最好的CD播放機能達到的底噪在-93dB。這樣依然會損失某些細節。新的Beta數位底噪在-102dB而Pi更達-105dB以上。

    即時全電源供應 (IFE)

    理解專利立案的IFE電源供應的方式就是把它想像成一台不需要換檔就能變速的車子。在任何時候都有足夠的動力毫不費力地,達到任何需要的速度。或者想像為一位不論他如何在場上奔跑,都不需要回氣的運動員。Pi配有IFE而Beta則配有IFE的精簡版。

    Rosita終極版本,Pi

    Pi在輸出級下了很多工夫並有一項稱為DFTA的技術。DFTA可以分析最適合前級以及後級的輸入,然後改變自己的輸出讓自己的輸出等同於接續在後面的器材能夠工作最順暢的輸入。也就是說不論使用什麼樣的擴大機,Pi都能夠合諧地與它們一起工作。

    其他觀點

    當從類比進步到數位來說,它對Audio來說是一大進步,但是對重播卻是一大退步。原因是因為所有的數位設備都需要一項時間基準用以把數位檔案還原為聲音。而音樂本身也是建立在一項時間基準上的,那就是節拍。當你把兩個時間基準放在一起時,不可避免地,你一定會讓其中一個品質下降。而在電路板上的時間基準沒有辦法改變,否則有可能這台機器就不能運作了。所以音樂的節拍會受到傷害。而Rosita克服了這個問題。在電路中,數位訊號可能只需要30公分的路徑就會感受到失真,而類比訊號則可以到達30公尺以上都還不會感受到失真。所以避免數位失真的首要工作就是縮減路徑長度。因此Rosita採用網路傳輸,訊號經過最短路近直接進入DAC Chip解碼,把各種失真的影響減到最低。

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