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oss_midiloop - Loopback MIDI driver.
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The loopback midi driver makes it possible to create special purpose
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virtual midi devices based on user land server processes.
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MIDI loopback devices are like named pipes or pseudo terminals. They are
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grouped in client and server device pairs. The server side device must be open
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before the client side device can be opened.
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The server side device is used by some special application (such as a
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software based MIDI synthesizer) to receice MIDI events from the applications
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that want to play MIDI.
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Client applications such as MIDI players open the client side device when they
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need to play some MIDI stream (file). The client side device behaves like any
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"ordinary" MIDI device. However it cannot be opened when there is no program
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connected to the server side.
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MIDI loopback devices differ from "normal" MIDI devices because an
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application is needed at the both ends of the loop. The loop device
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will return a "Connection reset by peer" error (ECONNRESET) error. Applications
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designed to be used as loopback based server applications can/should use this
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error (returned by read or write) as an end-of-stream indication.
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o midiloop_instances: Specifies how many loopback client/server MIDI device
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Values: 1-16 Default: 1
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CONFIGFILEPATH/oss_midiloop.conf Device configuration file