[CAS] Integer Mode Playback

[sgyyz]

Beyond bit perfect: The importance of the Player Software And MAC OS X Playback Integer Mode

In computer audio, the player software replaces the CD drive as the transport feeding the DAC. Ensuring bit‐perfect output of the original audio signal is a pre‐requisite, while minimizing jitter and RF interferences are still strongly needed. This paper explains the main factors impacting sound quality on the computer side, and the means that have been implemented in Audirvana player and the AMR DP‐777 DAC to boost the audio experience to the next level above the normal iTunes. These main means are bit-perfect, sample rate switching, asynchronous transfer and Integer Mode.

http://www.amr-audio.co.uk/large_ima...ger%20Mode.pdf

[hugoo]

作者: sgyyz

Beyond bit perfect: The importance of the Player Software And MAC OS X Playback Integer Mod
http://www.amr-audio.co.uk/large_image/MAC%20OSX%2...

这个AMR DP‐777卖$5000

看起来主要有2个卖点：
1. zero jitter.
2. async USB

这个zero jitter 不知道是个噱头还是something for real, 想看看他的jitter spec是多少，可惜竟然没有列出来

比较prismsound的DA2的Jitter spec:
Attenuation slope 80dB/decade
Corner frequency approx. 80Hz
Attenuation above 500Hz greater than 60dB
Intrinsic less than 18 picoseconds RMS

如果能干过DA2这个上个世纪98年的产品，那还有点意思，可又不敢列出spec，这东西还是让人不放心。

[hugoo]

不知道这个integer mode和windows上用ASIO又什么区别，ASIO也是bypass windows里的很多layer直接跟驱动打交道。