The opcodes that write audio signals are:
    
      
        
          - 
            Synchronous output: out, out32, outc, outch, outh, outo, outrg,  outq, outq1, outq2, outq3, outq4, outs,outs1, outs2 outx and hdf5write 
- 
            Streaming output: soundout and soundouts 
- 
            User defined channel output: outvalue 
- 
            Direct from zak output: outz 
- 
            Websocket output: websocket 
 
      
  
      
    The opcode  monitor can be used for monitoring the complete output of csound (the output spout frame).
  
      
    See the section Software Bus for input and output through the API.