JCAT NET CARD FRMTO accept Pre-Order Now.

AfterDark. Project ClayX I2S DAC Carbon Fiber Shielding (CFS) Audio Interface

Adds on

AfterDark. Project ClayX I2S DAC Carbon Fiber Shielding (CFS) Audio Interface

電磁干擾(EMI)在設計I2S DAC時,以盡量減少對射頻干擾和其他形式的EMI的影響。材料選擇,物理佈局,接地實踐,並且數碼線設計都已被指定,以減少電磁場對本機性能的影響。然而,與此同時,店主的主要目標是在正常的家庭環境中準確地再現錄音室錄製的音樂. 

AfterDark. x 音響夜冷店 2017推出新產品: Project ClayX I2S DAC Carbon Fiber Shielding (CFS) Audio Interface Device

店主設計這I2S DAC用於 daisyCAS, audiophileCAS DTD , AfterDark. LEGO x Raspberry Pi 3 or any Raspberry Pi3。

為什麼選擇I2S?
I2S(Inter-IC Sound Bus)是飛利浦公司為數字音頻設備之間的音頻數據傳輸而制定的一種總線標準。在飛利浦公司的I2S標準中,既規定了硬件接口規範,也規定了數字音頻數據的格式。

I2S有3個主要信號:

 

  • 串行時鐘SCLK,也叫位時鐘(BCLK),即對應數字音頻的每一位數據,SCLK都有1個脈衝。SCLK的頻率=2×採樣頻率×採樣位數
  • 幀時鐘LRCK,用於切換左右聲道的數據。LRCK為「1」表示正在傳輸的是左聲道的數據,為「0」則表示正在傳輸的是右聲道的數據。LRCK的頻率等於採樣頻率。
  • 串行數據SDATA,就是用二進制補碼表示的音頻數據。
“cpu直出i2s真正火力全開, 初聽感覺像cd轉成sacd, 爛錄音變的更噴飯像是轉檔失敗一樣, 製作棒的果然是歌姬琴神.以前學長說, usb介面聲音輸i2s輸到連車尾燈都看不到, 當時的我竟然把他的話當放屁,現在感受到了, usb dac隔層紗的音質依舊復在” 

“i2s是dac ic與數位音源最直接的橋樑, 有做過功課的鄉親朋友, 都知道i2s是最好的無能出其右, 其他任何傳輸介面都比不上它”


店主為什麼選擇碳纖維模板?
碳纖維模板是一種含碳量在95%以上的高強度,高模量纖維的新型纖維材料。它是由片狀石墨微晶等有機纖維沿纖維軸向方向堆砌而成,經碳化及石墨化處理而得到的微晶石墨材料。碳纖維外柔內剛,質量比金屬鋁輕,但強度卻高於鋼鐵,並且具有耐腐蝕,高模量的特性,在國防軍工重要材料。它不僅具有碳材料的固有本徵特性,電磁屏蔽性好。

Evo Edition 將使用碳纖維模板, 高品質的碳纖維連接線. 
為了保持更好的屏蔽,同時保持音質的穩定,你會體驗到背景是黑暗和無噪音。

店主為什麼選擇ES9023?
當店主從AfterDark. audiophileCAS DTD 的 PCB 上拉出 I2S,自然而然地,就試著接上 ES9022,變成 I2S 直入 DAC 的組態,跳過了 WM8804 這一層。I2S 直入的聲音,非常優秀,明顯好過經 SPDIF 與 WM8804。最顯著的差異是細節與微動態,直入的聲音,在較小的音量小,仍然能保持相當豐富的細節,更為細膩清晰,直有撥雲見日之感。

聽古典樂,特別是鋼琴獨奏、交響樂、歌劇,用 ES9023 聽起來卻更為過癮. 音色華麗無比.

為什麼選擇工業級有源矽晶振?
由於ES9023的MCLK支援非同步異步晶振, 所以店主特意加了工業級有源矽晶振, 從設計和工藝的角度完全杜絕了傳統石英晶振生產工藝中引起的電路不起振,停振,氣密性問題,一致性差等一系列品質問題,工業級有源矽晶振抗震可達50000G

為什麼選擇Industrial SD Card+runeaudio系統+線性電源+i2s DAC?
普通SD卡和Industrial SD Card 的差別是,普通SD卡三頻不夠開不夠透整個羞澀的讓音樂很無趣,
當店主用上Industrial SD Card+runeaudio系統+線性電源+i2s DAC,您可能不會相信那是先前您所聽到的樹莓派,PC練一百年都追不到那種潔癖高雅的好聲派.

ES9023 Technical Specification: 
  • Hyperstream architecture and Time Domain Jitter Eliminator
  • Onboard ultra-low ripple independent power supply digital crystal, the output frequency of 19.2000MHz
  • Supported I2S input sample rates (kHz): 44.1KHz,48KHz,88.2KHz,96KHz,176.4KHz,192KHz
  • SNR: 112dB
  • 3u gold plated pin on I2S connector
  • Gold plated RCA connector
  • 3.5mm gold plated phono output
  • Input DC: 4.2V-5V

店主為什麼選擇TI Burr-Brown PCM5102A?
店主除了需要理想的音質,進行了所有的電路和技術的審查。D / A轉換部分,另到準確性和時間軸的jitter進一步提高,轉換部分準確地描繪所有包含在音樂信號中的信息。最後音樂播放有種細膩+清秀的感覺. 最顯著的差異是細節與微動態,直入的聲音,在較小的音量小,仍然能保持相當豐富的細節,更為細膩清晰,直有撥雲見日之感。

PCM5102A內部PLL時鐘
訊號輸入是I2S,PCM5102A可以不用外部SCK輸入,自己會參照BCK去產生
Raspberry Pi can make use of Integrated High-Performance Audio PLL which can Generate MCK Internally with BCK as reference.

PCM5102A Technical Specification: 
  • Murata's ultra-low ESR chip controllers in parallel for power smoothing capacitor 22 uF x 4 = 88uF.
  • AVX’s high-performance tantalum chip for the power supply capacitors x 3
  • Panasonic's high performance film ECHU Condenser 2.2nF x 2 applied on L/R for the output stage filter condenser,
  • Supported I2S input sample rates (kHz): 16 / 24 / 32 Bits 44.1KHz,48KHz,88.2KHz,96KHz,176.4KHz,192KHz,352.8KHz,384KHz
  • SNR: 112dB
  • 3u gold plated pin on I2S connector
  • Gold plated RCA connector
  • 3.5mm gold plated phono output
  • Input DC: 4.2 -12V

AfterDark. Project ClayX I2S DAC 的設計理念: 

  • 通過單獨的I2S DAC遠離Pi 3降低EMI干擾。這是因為店主認為,分離音頻模塊,電源模塊和避免EMI從CPU處理器的高頻是重要的.
  • 使用高品質的工業級內部時鐘,鍍銀I2S電纜來盡量減少抖動,並優化所有電路路徑盡可能短。
  • 為I2S DAC構建一個帶有5V線性電源的外部直流插頭,店主認為電能質量對於數字信號和聲音質量是重要的。
  • 嘗試碳纖維屏蔽(CFS) Cables 和DAC頂層上的3mm厚度碳纖維板上的屏蔽材料來減少對I2S DAC的干擾。
  • 嘗試使用工業品質部件為Hi-Res Audio建立出色的output stage。
  • 增加I2S DAC上的穩定性。增加中心重量. 使用特殊的吸收震盪材料應用於金屬鋁材料上. 以確保發燒的RCA插頭和電源線具有剛性支撐。
Audio Test Review:
Let talk about why we have such a product for AfterDark. This product itself is quite innovative, AfterDark. is trying to do something in different approach. The shop owner knows there is a lot of raspberry pi compatible board product to provide DAC solution. However, they are just fine with simple hardware implementation and all in one box design.

AfterDark. have some innovative approaches for I2S DAC for Raspberry which audiophile can ensure their I2S DAC is in excellent sound performance:
  • Reduce EMI interference by separate I2S DAC away from the raspberry pi. It is because the owner believed that it is always a good idea to separate audio module, power module and avoid EMI from the high frequency of CPU processor.  
  • Try to minimize the jitter by using high quality industry grade internal clock,silver plated I2S cables and optimize all the circuit path as short as possible.
  • Build an external DC plug with 5V linear power supplies for I2S DAC, the owner believe the power quality is extreme important to digital signal and sound quality.
  • Try to reduce the interference on I2S DAC with better shielding material on Carbon Fiber Shielding (CFS) cables and 3mm thick Carbon Fiber Board on top layer of DAC and apply KEMET's EMI Absorber on DAC Chips.
  • Try to build an excellent output stage for Hi-Res Audio using industrial quality components.
  • Increase the shock stabilization on I2S DAC.  Special absorber material is applied under the large heavy mass of aluminum metal to ensure audiophile RCA plug and cable have rigid support.
Now, AfterDark, release an I2S DAC audio interface module for all the audiophile clients. We will have 2 different versions as show in the product matrix: 

There is two DAC chips to choose, ES9023 and TI PCM5102A. Generally, they are different sounding and characteristic. 

AfterDark x ClayX Project Taylor I2S DAC Extreme Edition 
  • Extreme Edition equipped with ultra-high quality 3mm transparent acrylic plastic in dark brown at the top.
  • Optional with 5V DC LPS supply to ensure music is smoother and provide darker sound image.
  • AfterDark. Silver Plated I2S cable
AfterDark x ClayX Project Palette I2S DAC Carbon Fiber Evo Edition 
  • Limited Evo Edition equipped with extreme thick 3mm Carbon Fiber Board at the top to eliminate the EMI and provide excellent “Car Racing” grade stabilization and presentation.
  • Optional with 5V DC LPS supply to ensure music is smoother and provide darker sound image.
  • AfterDark. Silver Plated I2S cable Woven with Carbon Fiber Shielding (CFS) technology
所有發燒產品從設計,生產和裝配及售後服務將會在香港每日夜晚9點開始...人手製作。
因為店主只能在晚上開始生產線,店主每晚只能生產有限的AfterDark.產品。



Related Items