Open Sound System
OSS 4.x Programmer's Guide

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MIDI_CAP_INTERNAL MIDI device capability

The MIDI device is located "inside" the computer

This capability is given to MIDI devices that are known to be internal parts of the actual device (such as PCI, USB or FireWire card).

Exact usage of this capability is for further study. Applications should avoid checking it.

MIDI device capabilities like MIDI_CAP_INTERNAL can be checked using the SNDCTL_MIDIINFO ioctl call.