Tell('/dev/midi')

Help!
1

I’m using: SWI-Prolog version 8.2.4 on debian bookworm

Why I can’t:
tell(’/dev/midi’).
?
Back again and greetings, Gerhard

2

Did it give you an error when you did it?

3

Thank you for your quick response!
Last time I’ve written

tell('/dev/midi2'),write(144),write(60),write(64),told.

it gave error messages – not now. I don’t know why. Sorry for the noise. But obviously there is another mistake in the code above.

Grüße, Gerhard

4

Hi together!

The following code does, what I expect. On other machines midi2 could be midi1 or else.
as

  :-	'spiel Akkord'( 60, 58, 55, 52, 2.2 ),
  	'spiel Akkord'( 60, 57, 53, 51, 2.2 ).
  
  'spiel Akkord'( S, A, T, B, Dauer )
  :- m_out( 144, B, 64 ),
     m_out( 144, T, 64 ),
     m_out( 144, A, 64 ),
     m_out( 144, S, 64 ),

     sleep( Dauer ),

     m_out( 144, B, 0 ),
     m_out( 144, T, 0 ),
     m_out( 144, A, 0 ),
     m_out( 144, S, 0 ).

  m_out( I1, I2, I3 )
  :-	char_code( A1, I1 ),
  	char_code( A2, I2 ),
  	char_code( A3, I3 ),
  	tell( '/dev/midi2' ),
  	write( A1 ),
  	write( A2 ),
  	write( A3 ),
  	flush_output,
  	told.

Is there there a way for binary out to avoid char_code/2? It must be, but I don’t find it out.

 Grüße, Gerhard
5

If I understand your problem correctly.

See: I/O problem - #3 by jan

6

OK; Thanks!