Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/multimedia:proaudio/openSUSE_Tumbleweed/multimedia:proaudio.repo
zypper refresh
zypper install gsequencer
Для openSUSE Slowroll запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/multimedia:proaudio/openSUSE_Slowroll/multimedia:proaudio.repo
zypper refresh
zypper install gsequencer
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/multimedia:proaudio/15.6/multimedia:proaudio.repo
zypper refresh
zypper install gsequencer
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/multimedia:proaudio/15.5/multimedia:proaudio.repo
zypper refresh
zypper install gsequencer
Для 15.4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/multimedia:proaudio/15.4/multimedia:proaudio.repo
zypper refresh
zypper install gsequencer