Asynchronous USB to I2S interface
I2SoverUSB v.III board is especially designed for asynchronous audio transfer.
It can transmits PCM and both DSD512 native and DSD256 DoP audio data. This board provides bit-perfect playback at sampling rates from 44.1 kHz up to 768 kHz with up to 32 bit resolution.
I2SoverUSB v.III can work with most DIY DAC boards with I2S, LJ, RJ and S/PDIF inputs. Also I2SoverUSB v.III supports directly PCM1704, PCM63, PCM61, PCM58, PCM56, AD1862, AD1865, AD1861, AD1860, AD1851, TDA1541 in simultaneous mode and other compatible with listed DACs. Thus these DACs can work in NOS mode or PC oversampling.
I2SoverUSB v.III uses reclock to reduce jitter significantly. I2S, S/PDIF outputs, oscillators and reclock are galvanically isolated from XMOS processor and USB ground. The galvanic isolation eliminates common noise originated by the computer. There is an galvanically isolated external master clock input. The board is equipped with NDK NZ2520SDA ultra low phase noise oscillator 45.158MHz and 49.152MHz. LP5900 ultra-low noise linear voltage regulators are used.
New DSD512 AK4493 DAC board was designed especially for I2SoverUSB v.III.
Several DACs were designed for I2SoverUSB board PCM5102, DSD128 DAC AK4396 and DSD256 DAC AK4490. All of them can work with I2SoverUSB v.III.
I2SoverUSB v.III can work with most DIY DAC boards with I2S, LJ, RJ and S/PDIF inputs. Also I2SoverUSB v.III supports directly PCM1704, PCM63, PCM61, PCM58, PCM56, AD1862, AD1865, AD1861, AD1860, AD1851, TDA1541 in simultaneous mode and other compatible with listed DACs. Thus these DACs can work in NOS mode or PC oversampling.
I2SoverUSB v.III uses reclock to reduce jitter significantly. I2S, S/PDIF outputs, oscillators and reclock are galvanically isolated from XMOS processor and USB ground. The galvanic isolation eliminates common noise originated by the computer. There is an galvanically isolated external master clock input. The board is equipped with NDK NZ2520SDA ultra low phase noise oscillator 45.158MHz and 49.152MHz. LP5900 ultra-low noise linear voltage regulators are used.
New DSD512 AK4493 DAC board was designed especially for I2SoverUSB v.III.
Several DACs were designed for I2SoverUSB board PCM5102, DSD128 DAC AK4396 and DSD256 DAC AK4490. All of them can work with I2SoverUSB v.III.