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Singxer SU-2 USB Digital Interface (Apos Certified)
The Singxer SU-2 is a USB digital audio interface that can also be used as an independent master clock. It comes with the latest ARM Cortex-M4 that controls the USB data and also uses a ultra-low jitter clock system. Among the various outputs it has, it includes XLR balanced AES, coaxial RCA/BNC, I2S interface with HDMI socket, and a perfect master clock/word clock output. Apos Audio also found that the SU-2 also supports an external 10 MHz clock input using the common 50 ohm input impedance design.
When the SU-2 is used as an independent master clock, it can output a word clock of 44.1K-384K, or output a master clock of 22.5792 Mhz - 49.152 Mhz. It can be used as a frequency converter when an external 10 Mhz clock input is being used.
Note: This is the 110 V version. Please contact us if you are looking for the 220 V version.
Sampling Rates
- PCM: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 705.6, 768 kHz
- I2S supports all sampling rate, S/PDIF supports up to 384 kHz, DOP 128
- DSD: 2.8 MHz (DSD64), DOP, native; 5.6 MHz (DSD128) DOP, native; 11.2 MHz (DSD256), DOP native; 22.5792 MHz (DSD512 ), DOP, native; 45.1584 MHz (DSD1024), native
- I2S output supports all DSD; S/PDIF, AES/EBU support DSD128 DOP mode
Bit Width
- Up to 32 bit over I2S output
- Up to 24 bit over S/PDIF
- USB input socket is a standard USB-B type socket, USB power supply range 4.5V–5.1V
- RCA connector outputs standard S/PDIF signal, electrical level is 550 mV (standard connection load), output impedance of 75 ohms
- Power supply input is AC 115V/230V
System Compatibility
- Windows XP, Windows 7, Windows 8, Windows 10: 32/64 bit, need installed driver
- Native Mac OS 10.6 and later: Use own driver
- Native Linux with UAC2 compliant kernel: Use own driver
- Android OS 4.2 and above: Need support OTG function
I2S Port Using HDMI Output
- Electrical level is 3.3V LVDS differential signal
- DSD ON signal, 5V power supply, CPLD has processed the mute signal (no need to process again)
- DSD ON signal can be user defined, DSD ON signal can be connected to PIN 13, 14, 15, 16 on the socket
Flexible HDMI-I2S Output Configuration
- Switch 1–4 is for PIN13–16 on the HDMI socket
- When you turn “ON”, it means that HDMI PIN has DSD_ON function
- Switch 5 and 6 are clock output mode
- Switch 5 “OFF” is MCLK, “ON” is WCK
- Switch 6 configures the frequency of MCLK, which is 22.5792M / 24.576M when "OFF", and 45.1584M / 49.152M when "ON". The configuration of switch 6 is valid for CLK OUT, RJ45-I2S, and HDMI-I2S
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Switch 7 can set the left and right channels in DSD mode in I2S signal separately
- Switch 8 can set the BCLK line sequence in the I2S signal
- When OFF, PIN4 is BCLK + and PIN6 is BCLK -
- Switch 9 can set the line sequence of LRCLK in I2S signal
- When OFF, PIN7 is LRCLK + and PIN9 is LRCLK -
- Switch 10 can set the line sequence of DATA in I2S signal
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When OFF, PIN1 is DATA + and PIN3 is DATA -
