Channel mixer ? Stereo Upmix ?

[wd9895]

Hi DRO & WACUP coders,

I have a question of understanding.

In the settings Preferences => Plug-ins => Output => Channel Mixer => Output format I found 4.1, 5.1 and other speaker configuration.

As I have a 5.1 Realtec sound card (which works on multichannel sources) in my PC I'm wondering if this is an upmix codec (stereo to multichannel, like SB X-Fi) or just an output format for multichannel audio files (AC3, Dolby, etc) ?

I can click any of the available options but no effect noticable.
What do I have to keep in mind?

The settings are equal in x86 and x64 version.
Release: 12. Jan 2026

Thanks!






 

[dro]

It's mainly for adjusting the channels being output so stereo to 5.1 for stereo input or a different way to do stereo to mono if the input plug-in being used doesn't natively support that playback mode. That's all subject to having the needed output device being compatible & the OS vs the output plug-in that's selected via it also supporting it. For some it's not needed if everything is already configured on the hardware / audio driver / OS side but for others it's needed to get what's expected.

If it's actively in use then the input & output levels on that prefs page should be indicating what's being received along with what's being output but that requires the Not So Neo output plug-in to be set as the active output plug-in via the dropdown at the top of the prefs -> plug-ins -> output page. I probably should do something to better indicate that it's not the active output plug-in when viewing that prefs page to avoid that potential confusion otherwise it may or may not be required in use.

[wd9895]

Hi Darren,

it works ! 

The "Not So Neo" output plug-in was the right setup and I can now play with the DSP setup parameters. Thanks !
The stereo upmix is a very nice option !