rocedure:
<OL>
<LI>
Allocate private data record.</LI>

<LI>
Create an ALSA sequencer port.</LI>

<LI>
Set the new port address on arg->addr.</LI>

<LI>
Set the private data record pointer on arg->private_data.</LI>
</OL>
Note that the type bit-flags in port_info of this synth port must NOT contain
<TT>TYPE_MIDI_GENERIC</TT>
bit. Instead, <TT>TYPE_SPECIFIC</TT> should be used. Also, <TT>CAP_SUBSCRIPTION</TT>
bit should NOT be included, too. This is necessary to tell it from other
normal MIDI devices. If the