Advanced Gtk+ Sequencer is an audio
sequencer application supporting the LADPSA, DSSI and Lv2 plugin
formats. It can output to Pulseaudio server, JACK and ALSA.
You may add multiple sinks, mix different sources by producing
sound with different sequencers. Furthermore, it features a pattern
and piano roll and there is an editor to automate ports.
There is no official package available for openSUSE Leap 15.4