Try if it is available in the default repositories (apt-get content is different from the software center content)
apt-get install pulseaudio-equalizer
If it doesn't work,add one of the Debian repositories.
It's available in the sid unstable repository.
You can't do that with an command but with editing the file /etc/apt/sources.list.
More information here: https://wiki.debian.org/SourcesList
Deepin is based on Debian so the Debian tutorials work most times.

Sorry, I followed the links and just got lost.  So, I'm just going to go with that there isn't one for Deepin.

My description was a bit too complicated.
I have read the tutorial myself now and can exactly say what to do.
Add the following line to your /etc/apt/sources.list:
deb http://deb.debian.org/debian unstable main contrib non-free
Now run "apt-get update" and then "apt-get install pulseaudio-equalizer" should work.

straightly adding a debian repository source may cause dependency problem.

`add-apt-repository` execution reference here:
https://bbs.deepin.org/post/138957

Thanks, I now have it installed and it works.  

Thanks for the help.  Do you have any idea on this issue?
https://bbs.deepin.org/post/141176#=1#pid343521

Sorry but I can't help at the other topic.
I looked into the preferences and didn't find that settings.
I live in Germany where I need Celsius and a 24h clock anyway.

Thanks for the help.  I have found out that the weather app does not currently do Fahrenheit and the only clock that does 12hr is on the dock.  I do hope that they are able to resolve these things.  Doing the conversion between Celsius and Fahrenheit in my head is not all that fun and the clock thing makes for an inconsistent UI.  anyway, thanks for all your help.

cd /tmp/
wget http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu/pool/main/p/pulseaudio-equalizer/pulseaudio-equalizer_2.7.0.2-5~webupd8~xenial0_all.deb
sudo dpkg -i pulseaudio-equalizer_2.7.0.2-5~webupd8~xenial0_all.deb
rm pulseaudio-equalizer_2.7.0.2-5~webupd8~xenial0_all.deb

pulseaudio-equalizer-gtk

Whenever I install PulseAudio Equalizer no matter what method deepin immediately tells me there are system patches available if I chose to install them, Pulse Audio disappears, the only way to make it stick is not getting the updates, but then you always have that notification there, also the other day there was an update to Calculator so when I tried to get that calculator update the PuseAudio Eq. again disappeared, so I just gave up on it for now.