Orpheus DA1

– Digital to Analogue Conversion Board with 24bit/192kHz Sample Rate Converter

ORPHEUS DA–ONE is a 2 channel 24bit/192kHz upsampler and digital to analog converter board for the ORPHEUS ONE digital audio interface. Up to four ORPHEUS DA-ONE can be installed in the ORPHEUS ONE, providing up to eight channel digital to analogue conversion of unequalled quality.

ORPHEUS DA–ONE features Anagram Technologies ATF 24/192 software based sample rate conversion technology. Each incoming data stream (up to 96 kHz at the time) is converted into a high definition 24bit/192kHz signal prior to being converted to the analogue domain. The complexity of the analogue reconstruction filter is significantly reduced by using a 192 kHz sampling rate. This results in near perfect phase linearity and soundstage quality.

Technical data

Input (digital) one S/PDIF, 75 Ohm, 0.5 V, on RCA connector
one AES/EBU, 110 Ohm, 5 V, on XLR connector
Output (analogue) either balanced, 4 Vrms, on XLR connector or unbalanced, 2 Vrms, on RCA connector
Output impedance 75 Ohm
24 bit / 44.1 kHz input signal harmonic distortion (THD+N) 0.00055 % @ 0 dB FS
0.00680 % @ -30 dB FS
0.18000 % @ -60 dB FS
dynamic (THD+N @ -60 dB FS) 116 dBr
signal to noise ratio 118 dBr
residual noise 20 Hz to 22 kHz 5.0 µV @ 4 Vrms balanced
2.5 µV @ 2 Vrms unbalanced
16 bit / 44.1 kHz input signal harmonic distortion (THD+N) 0.00090 % @ 0 dB FS
0.02500 % @ -30 dB FS
0.80000 % @ -60 dB FS
dynamic (THD+N @ -60 dB FS) 101 dBr
signal to noise ratio 118 dBr
residual noise 20 Hz to 22 kHz 5.0 µV @ 4 Vrms balanced
2.5 µV @ 2 Vrms unbalanced
Frequency response set for optimal transient response