Wouldn't the decoded signal be analog?What i think is to test the Digital signal output after the player decodes.
but how do you be certain that deltawave can decode the original file perfectly to be a standard?最简单的方法是使用 Deltawave 或类似程序将原始文件与软件播放器的输出进行比较。它获取两个文件并找出它们之间的差异。理想情况下,一般来说,软件音频播放器的输出不会有任何输出。https://www.audiosciencereview.com/...test-deltawave-null-comparison-software.6633/
WASAPI does that,exposes the loopback feature (with the right devices,not to all of them)There is also a driver in Windows that acts that way. I forget the name just now.
no ,The decoded signal is converted into an analog signal after undergoing DAC digital to analog conversionWouldn't the decoded signal be analog?
DeltaWave is written by @pkane and over the years, there has been all sorts of mathematical comparisons even against expensive paid-for products so it’s not a black box in terms of software.but how do you be certain that deltawave can decode the original file perfectly to be a standard?
If we’re talking about lossless compression codecs, because there is mathematical proof that they work, and the software themselves has plenty of unit and regression tests to validate its functionality.but how do you be certain that deltawave can decode the original file perfectly
??? If the signal is a digital file, e.g., PCM, it is read by the player and output to the DAC for conversion to analog. Are you referring to the digital (PCM) stream between player and DAC with the suggestion that there are potential errors/distortion in reading the file?no ,The decoded signal is converted into an analog signal after undergoing DAC digital to analog conversion
What is the particular format of digital signal (codec?) you're concerned with?no ,The decoded signal is converted into an analog signal after undergoing DAC digital to analog conversion
I think he is referring to digital convertion to PCM, from flac, wavepack etc. and whether it is actually outputting in bit-perfect or not.??? If the signal is a digital file, e.g., PCM, it is read by the player and output to the DAC for conversion to analog. Are you referring to the digital (PCM) stream between player and DAC with the suggestion that there are potential errors/distortion in reading the file?
VB-Cable, Virtual Audio Cable (VAC).You can get an audio interface with loopback and record the output and then compare it to input. There is also a driver in Windows that acts that way. I forget the name just now.
@Huang1997 Something like this to a recorder, then deltawave to compare to another decoding of the same file, or some bitperfect PCM. Whatever you want to use as reference.VB-Cable, Virtual Audio Cable (VAC).
I think he is referring to digital convertion to PCM, from flac, wavepack etc. and whether it is actually outputting in bit-perfect or not.
As @voodooless has hinted, sometimes the original is a lossy format, being converted to PCM.
pcm and dsdWhat is the particular format of digital signal (codec?) you're concerned with?
yes, thats what i mean??? 如果信号是数字文件,例如PCM,则播放器读取该信号并将其输出到DAC以转换为模拟信号。您是否指的是播放器和 DAC 之间的数字 (PCM) 流,并建议读取文件时存在潜在错误/失真?
And how/where from are you getting the digital signal?pcm and dsd