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純鋼琴流程2.1
Piano can work as a 2.0 (all frequencies are passed to LR) as a 2.2 (xover frequency is chosen in GUI) and subwoofer has 2 outputs or as a 2.1 (same as 2.2 but subwoofer is mono).
We are using 2 DAC Ic's PCM5142 with integrated DSP. The PurePath software from TI is available for download (registration required) and can be used to create specific filters and other audio functions.
The board will come pre-programed as a 2.1 output (but you can create your own custom design and load it the board and can access the xover frequency directly from linux (we made a small app).
Hardware wise, we have split the digital and analog side with LDOs and we feed the analog side using an extremely capable LDO LT3042 which is having ultra low noise and ultra high PSRR.. Basically each board has 4 LDO (2 for each DAC ic) (note that digital side uses cheaper LDOs).
Of course, on the analog side we used only thin film resistors and poly caps in audiopath.
鋼琴可以作為一個2.0（所有頻率都傳遞給LR）作為2.2（在GUI中選擇xover頻率），低音炮有2個輸出或2.1（與2.2相同，但是低音炮是單聲道的）。
我們使用2個DAC Ic的PCM5142集成DSP。TI的PurePath軟件可以下載（需要註冊），可用於創建特定的過濾器和其他音頻功能。
該板將作為2.1輸出預編程（但您可以創建自己的定制設計並加載它，並可以直接從linux訪問xover頻率（我們製作了一個小應用程序）。
硬件方面，我們已經將數字和模擬端與LDO分開，我們使用極其強大的LDO LT3042饋入模擬端，該LT3042具有超低噪聲和超高PSRR。基本上每個板都有4個LDO（每個DAC ic為2個） （請注意，數字方面使用更便宜的LDO）。
當然，在模擬方面，我們在音頻路徑中只使用薄膜電阻和多晶矽。
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Features
- Piano 2.1 is a Slave DAC (Slave DACs are compatible with Sparky or Kali)
- Dedicated two No’s of 384 kHz/32bit high-quality DAC PCM5142 for best sound quality
- Available with different output connectors: 4 x RCA
- DAC SNR is 112dB
- DAC THD+N @ - 1dBFS are –93dB
- Full Scale Output of DAC is 2.1Vrms
- Dynamic Range of DAC is 112dB
- Sampling Frequency ranges from 8 kHz to 384 kHz. (Sample rate is limited to 192kHz, for subwoofer modes - 2.1 & 2.2)
- Ultra-low-noise voltage regulators for optimal audio performance
- Integrated EEPROM for automatic configuration (with write-protection)
- Compatible with OSMC / Max2Play / RuneAudio / Volumio / Moode / PiCorePlayer / PiMusicBox / OpenELEC and others + Roon Ready
- 鋼琴2.1是從DAC（Slave DAC與Sparky或Kali兼容）
- 專用兩個384 kHz / 32bit高品質DAC PCM5142的最佳音質
- 提供不同的輸出連接器：4 x RCA
- DAC SNR為112dB
- DAC THD + N @ - 1dBFS為-93dB
- DAC的滿量程輸出為2.1Vrms
- DAC的動態範圍為112dB
- 採樣頻率範圍為8 kHz至384 kHz。（採樣率限制在192kHz，低音炮模式 - 2.1和2.2）
- 超低噪聲電壓調節器，實現最佳音頻性能
- 用於自動配置的集成EEPROM（帶寫保護）
- 兼容OSMC / Max2Play / RuneAudio / Volumio / Moode / PiCorePlayer / PiMusicBox / OpenELEC和其他+ Roon Ready
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Technical Specifications
| Operating Temperature | 0C to 70C |
| Board Size | LWH = 68.7mm * 65mm * 22.2mm |
| Board Weight | 30g |
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