• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). There are daily reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

Roen

Addicted to Fun and Learning
Joined
Oct 14, 2018
Messages
668
Likes
241
Don't you switch between outputs manually in PEACE? How does APO know?
You see the dropdown on top of the editor that says Device?

If you set it up this way, you can see the EQ curve on the bottom change as you change device.

However, if you unplug a headphone and swap to another headphone, you'd have to manually change the EQ curve in EAPO at the DAC device level. This works if you have a DAC, another output dedicated for another device and BT headphones let's say.
 

Roen

Addicted to Fun and Learning
Joined
Oct 14, 2018
Messages
668
Likes
241
Does the -4 dB to avoid inter-sample overs setting still apply when using ASIO / WASAPI (i.e. foobar2000 with MathAudio Headphones EQ)?
 

Dlomb11

Active Member
Joined
Jul 6, 2020
Messages
265
Likes
81
Location
Milan, Italy
Does the -4 dB to avoid inter-sample overs setting still apply when using ASIO / WASAPI (i.e. foobar2000 with MathAudio Headphones EQ)?
Yes. The problem does not depend on the interface drivers, but on the conversion in dac ic.
 

Roen

Addicted to Fun and Learning
Joined
Oct 14, 2018
Messages
668
Likes
241
Yes. The problem does not depend on the interface drivers, but on the conversion in dac ic.
In foobar, should I apply -4.0 dB volume reduction or -4.0 dB MathAudio Headphones EQ preamp gain?
 

Dlomb11

Active Member
Joined
Jul 6, 2020
Messages
265
Likes
81
Location
Milan, Italy
In foobar, should I apply -4.0 dB volume reduction or -4.0 dB MathAudio Headphones EQ preamp gain?
There shouldn't be any difference
 

Mulder

Senior Member
Joined
Sep 2, 2020
Messages
422
Likes
511
Location
Gothenburg, Sweden
I decided to investigate this as I kept hearing issues with Windows, even after following common practice to (controversially) supposedly make it clean. I found some surprises along the way.
Thank you for sharing your research on this. It was very helpful.
 

Dunring

Addicted to Fun and Learning
Forum Donor
Joined
Feb 7, 2021
Messages
645
Likes
748
I just came across a Github with a program for disabling the peak limiter. It took Google Chrome translate, but it's got the source code and both 32 and 64 bit versions at:

It was posted three years ago, so the problem might have been fixed with a patch in the meantime. I ran the question through Chatgpt just for kicks, and it reported that the limiter was patched in some versions of Windows 10. It didn't say which ones (later ones I assume).

All it really had to say was:
"The CAudioLimiter issue was a bug in the Windows 10 audio stack that caused distortion and other audio quality problems when certain conditions were met. Microsoft released several updates to address this issue in Windows 10, and it is possible that these updates also apply to Windows 11."
 

edechamps

Addicted to Fun and Learning
Forum Donor
Joined
Nov 21, 2018
Messages
884
Likes
3,425
Location
London, United Kingdom
I just came across a Github with a program for disabling the peak limiter. It took Google Chrome translate, but it's got the source code and both 32 and 64 bit versions at:

In case you haven't seen, I already found a way to do that using a small registry hack. Which is a hack yes, but is still vastly cleaner than what the program you linked is doing: that program is monkey-patching the audio engine binary which is very risky and could potentially cause all kinds of problems, especially if you run it on a Windows version it was not designed for.
 
Top Bottom