When do measurements correlate with subjective impressions

[pkane2001]

1 hour ago, jabbr said:

Regarding “injecting” jitter into a file, this makes some big assumptions because jitter is a time phenomenon and files are not... 😉

 

A PCM file is voltage sampled over time... so it's not a time phenomenon?

 

[pkane2001]

1 hour ago, jabbr said:

Well it’s jitter that’s first baked and then frozen, so it might taste just like fresh jitter but might not, depending ...

 

I prefer my jitter fried...

 

[pkane2001]

5 hours ago, cat6man said:

fyi for linux folks.............i installed DISTORT under Crossover (supported version of wine) but i could not get all parts of it working (didn't see plots, for example).  installation automatically installed .NET framework 4.5

 

when i installed .NET framework 4.6.2, i started to see the plots and was able to save a WAV file after going through distortion

 

WINE 5 worked for me under Ubuntu 18. It installed the correct .NET framework automatically with DISTORT and all functions seemed to work after that.

[pkane2001]

Just came across this video by two researches, Steve Temme, and Sean Olive, on correlating objective measurements (THD, IMD, NCD) and subjective preferences for a number of headphones. This is a discussion of an AES published paper results covering this topic:

 

 

 

The published paper: http://www.aes.org/e-lib/browse.cfm?elib=14232

 

[pkane2001]

2 hours ago, lucretius said:

 

Yes, audio works under VMware but there are limitations -- the 2 limitations I can think of off hand are:

1) You are limited by the capabilities of the "virtual" sound device. (You can forget about playing DSD!)

2) I cannot get exclusive mode to work inside a VM. This creates a lot of problems (e.g. changing sample rates and bit depths, etc.).

 

 

 

 

I use VMWare with a USB DAC connected to the host computer (iMac in my case). No problems! When connecting the DAC to the Mac, I get a prompt from VMWare asking if I want to connect it to MacOS or Windows. Connecting it to Windows makes it work just fine with WASAPI and ASIO drivers installed on the VM. That's how I do most of my development.

 

[pkane2001]

3 minutes ago, lucretius said:

 

My experience was with a Linux guest. I don't have any Windows guests. Nonetheless, I am glad to hear it will work with a Windows guest  Does it work in exclusive mode?

 

Yes. The USB device is mapped directly to VMWare, MacOS doesn't see it or control it in this case. The native DAC driver inside Windows VM sees this as a proper type USB device connected to Windows. I've even done firmware updates this way on one of the DACs 😱