The SLV2 JACK packages are not available in bionic (18.04 LTS) repository, but you can install them from xenial (16.04 LTS) repository manually:
cd ~/Downloads
wget http://mirrors.kernel.org/ubuntu/pool/universe/s/slv2/libslv2-9_0.6.6+dfsg1-3build1_amd64.deb
sudo apt-get install ./libslv2-9_0.6.6+dfsg1-3build1_amd64.deb
wget http://mirrors.kernel.org/ubuntu/pool/universe/s/slv2/slv2-jack_0.6.6+dfsg1-3build1_amd64.deb
sudo apt-get install ./slv2-jack_0.6.6+dfsg1-3build1_amd64.deb
wget http://mirrors.kernel.org/ubuntu/pool/universe/s/slv2/libslv2-dev_0.6.6+dfsg1-3build1_amd64.deb
sudo apt-get install ./libslv2-dev_0.6.6+dfsg1-3build1_amd64.deb
The libjpeg62-turbo
is available from Debian Stretch repository:
cd ~/Downloads
wget http://ftp.debian.org/debian/pool/main/libj/libjpeg-turbo/libjpeg62-turbo_1.5.1-2_amd64.deb
sudo apt-get install ./libjpeg62-turbo_1.5.1-2_amd64.deb
Note: usually this method is not recommended, but in this particular case it is allowed.
dpkg -x
is a last resort, at first tryapt install ./some-package.deb
. I'll write complete answer.