NAME

       oss_midiloop - Loopback MIDI driver.

DESCRIPTION

       The  loopback midi driver makes it possible to create special purpose virtual midi devices
       based on user land server processes.

INTRODUCTION

       MIDI loopback devices are like named pipes or pseudo terminals. They are grouped in client
       and server device pairs. The server side device must be open before the client side device
       can be opened.

   SERVER SIDE DEVICE
       The server side device is used by some special application (such as a software based  MIDI
       synthesizer) to receice MIDI events from the applications that want to play MIDI.

   CLIENT SIDE DEVICE
       Client  applications  such  as  MIDI players open the client side device when they need to
       play some MIDI stream (file). The client side device  behaves  like  any  "ordinary"  MIDI
       device. However it cannot be opened when there is no program connected to the server side.

COMPATIBILITY ISSUES

       MIDI  loopback  devices differ from "normal" MIDI devices because an application is needed
       at the both ends of the loop. The loop device will return a  "Connection  reset  by  peer"
       error  (ECONNRESET)  error.  Applications  designed  to  be  used as loopback based server
       applications can/should use this error (returned by read or  write)  as  an  end-of-stream
       indication.

OPTIONS

       o midiloop_instances:
              Specifies how many loopback client/server MIDI device pairs to be created.

              Values: 1-16
                     Default: 1

KNOWN PROBLEMS

       None

FILES

       /etc/oss4/conf/oss_midiloop.conf Device configuration file

AUTHOR

       4Front Technologies

                                         03 December 2013                         oss_midiloop(7)