uos_LoadLib( pchar(PortAudioFileName), pchar(SndFileFileName), pchar(Mpg123FileName),  pchar(Mp4ffFileName), pchar(FaadFileName), pchar(OpusFileFileName) );

begin
  uos_LoadLib( PortAudioFileName, nil, Mpg123FileName,  nil, nil, nil); // only PortAudio and Mpg123 are needed. 
  uos_CreatePlayer( 0 );              // you may create how many players you want, from 0 to to what you computer can do...
  uos_AddIntoDevOut( 0 );             // Add Output with default parameters     
  uos_AddFromFile( 0, 'MySong.mp3' ); // Input from audio file 
    // And let's play it...
  uos_Play(0);                        // Play the song...
end;
...
uos_free;                             // Call this at end of application.

begin
  uos_LoadLib( pchar(PortAudioFileName), nil, pchar(Mpg123FileName), nil, nil, nil); // only PortAudio and Mpg123 are needed.
  uos_CreatePlayer( 0 );              // First create the player:
  uos_AddIntoDevOut( 0 );             // Add Output with default parameters     
  uos_AddFromFile( 0, 'MySong.mp3' ); // Input from audio file 
  uos_InputAddDSP( 0, 1 );               // Add as many dsp effects you want
  uos_InputAddDSP( 0, 2 );
  uos_Play( 0 );                      // Play the song with DSP effect...
end;
...
uos_free;                             // Call this at end of application.

begin
  uos_LoadLib( pchar(PortAudioFileName), nil, nil, nil, nil, nil); // only PortAudio is needed.
  uos_CreatePlayer( 0 );     
  uos_AddIntoDevOut( 0 );   
  uos_AddFromDevIn( 0 );   // Input from IN Device
  uos_Play( 0 );           // Listen to your mic in your loudspeakers...
end;
...
uos_free;                             // Call this at end of application.

begin
  uos_LoadLib( pchar(PortAudioFileName), pchar(SndFileFileName), pchar(Mpg123FileName), nil, nil, nil);
  uos_CreatePlayer( 0 );
  uos_AddIntoDevOut( 0 ) ;              // Output into OUT Device
  uos_AddIntoFile( 0, 'Myrecord.wav' ); // Output into wav file
  uos_AddFromDevIn( 0 );                // Input from IN Device
  uos_InputAddDSP( 0, 1 );              // Add as many dsp's you want
  uos_InputAddDSP( 0, 2 );
  uos_CreatePlayer( 1 );
  uos_AddFromFile( 1, 'MySong.mp3' );   // the background audio file
  uos_AddIntoDevOut( 1 ) ;              // Output into OUT1 Device;

  uos_Play(0);                          // Listen your mic with DSP effects and record it ...
  uos_Play(1);                          // Listen to mp3 while recording
end;
...
uos_free;                               // Call this at end of application.

uos_LoadLib( );              // Load dynamic libraries for uos  
uos_LoadLibs( );             // Load dynamic libraries for uoslibs
uos_UnLoadLib();             // To unload libraries.
uos_Free;                    // To use when application terminate.

uos_AddIntoDevOut();         // Output into OUT Device
uos_AddIntoFile();           // Output into Wav File
uos_AddIntoMemoryBuffer()    // Add a Output into memory buffer
uos_AddIntoMemoryStream()    // Add a Output into memory stream
uos_AddIntoIceServer()       // Add a Output into a IceCast server
uos_AddIntoFileFromMem()     // Add a Output into audio wav file from TMemoryStream

uos_AddFromDevIn();          // Input from IN device
uos_AddFromFile();           // Input from Audio File
uos_AddFromMemoryBuffer();   // Input from decoded pcm buffer
uos_AddFromMemoryStream();   // Input from a TMemoryStream of Audio File
uos_AddFromFileIntoMemory(); // Input from audio file and stored into memory buffer
uos_AddFromURL();            // Input from internet URL mp3/opus files
uos_AddFromSynth(;           // Input form built-in Synthesizer
uos_InputLength();           // Length of Input in samples
uos_InputPosition();         // Get position
uos_InputSeek();             // Change position in byte
uos_InputSeekTime();         // Change position in time
uos_InputSeekSeconds();      // Change position in second

uos_Play();                  // Start playing
uos_PlayPaused();            // Start playing paused.
uos_PlayNoFree();            // Start playing but do not free the player after stop.
uos_PlayPausedNoFree();      // Start playing paused but do not free the player after stop.
uos_RePlay();                // Resume playing after pause
uos_Stop();                  // Stop playing and free thread
uos_Pause();                 // Pause playing
uos_FreePlayer();            // Free the player. Works only when PlayNoFree() was used.

uos_InputAddDSP()            // DSP procedure for input
uos_OutputAddDSP()           // DSP procedure for output
uos_InputSetDSP()            // Set DSP In
uos_OutputSetDSP()           // Set DSP out
uos_InputSetDSPVolume(...)   // Set Volume
uos_InputAddFilter(...)      // Add filer
uos_AddPlugin(...)           // Add pluggin