Sequencer support

modulename: snd-seq.ko

and/or

snd-seq-midi-event.ko

and/or

snd-seq-oss.ko

configname: CONFIG_SND_SEQUENCER

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>Sequencer support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say Y or M to enable MIDI sequencer and router support. This
feature allows routing and enqueueing of MIDI events. Events
can be processed at a given time.

Many programs require this feature, so you should enable it
unless you know what you're doing.

source code: