I invoke csound (built from git yesterday) in daemon mode...

    csound -B1024 -d -odac:system:playback_ -+rtaudio=jack -+rtmidi=alsa -Ma --port=12345 ./live.csd

The content of live.csd is...

    <CsoundSynthesizer>
    <CsOptions>
    </CsOptions>
    <CsInstruments>
    sr = 44100
    ksmps = 4410
    nchnls = 2
    0dbfs = 1
    </CsInstruments>
    <CsScore>
    </CsScore>
    </CsoundSynthesizer>

I'm sending MIDI from an external sequencer.  All the csound startup messages
look good and I see the rt MIDI events being received...

    $ csound -B1024 -d -odac:system:playback_ -+rtaudio=jack -+rtmidi=alsa -Ma --port=12345 ./live.csd
    virtual_keyboard real time MIDI plugin for Csound
    0dBFS level = 32768.0
    Csound version 6.04 (double samples) Mar 28 2015
    libsndfile-1.0.25
    UnifiedCSD:  ./live.csd
    STARTING FILE
    Creating options
    Creating orchestra
    Creating score
    rtmidi: ALSA Raw MIDI module enabled
    rtaudio: JACK module enabled
    Elapsed time at end of orchestra compile: real: 0.003s, CPU: 0.010s
    sorting score ...
            ... done
    Elapsed time at end of score sort: real: 0.003s, CPU: 0.010s
    --Csound version 6.04 (double samples) Mar 28 2015
    midi channel 1 is muted
    midi channel 2 is muted
    UDP server started on port 12345
    midi channel 3 is muted
    midi channel 4 is muted
    midi channel 5 is muted
    midi channel 6 is muted
    midi channel 7 is muted
    midi channel 8 is muted
    midi channel 9 is muted
    midi channel 10 is muted
    midi channel 11 is muted
    midi channel 12 is muted
    midi channel 13 is muted
    midi channel 14 is muted
    midi channel 15 is muted
    midi channel 16 is muted
    displays suppressed
    0dBFS level = 1.0
    ALSA midi: Using all devices.
    ALSA: opened MIDI input device 'hw:2,0'
    ALSA: opened MIDI input device 'hw:3,0'
    ALSA: opened MIDI input device 'hw:3,1'
    ALSA: opened MIDI input device 'hw:3,2'
    ALSA: opened MIDI input device 'hw:3,3'
    orch now loaded
    audio buffered in 256 sample-frame blocks
     0: dac:system:playback_ (system:playback_)
     1:tdac:Qtractor:Master/in_ (Qtractor:Master/in_)
    writing 512 sample blks of 64-bit floats to dac:system:playback_
    SECTION 1:
      rtevent:         T  0.200 TT  0.200 M:  0.00000  0.00000
      rtevent:         T  0.700 TT  0.700 M:  0.00000  0.00000
      rtevent:         T  0.700 TT  0.700 M:  0.00000  0.00000
      ...

I squirt an instrument definition and MIDI channel setup into csound...

    $ cat <<EOF | nc -q0 -u 127.0.0.1 12345                                                                                             
    instr 1 
    icps cpsmidi 
    a1 vco2 .5, icps 
    out  a1 
    endin
    massign 1, 1
    EOF
    $

Csound immediately prints a message indicating some data was received...

      ...
      rtevent:         T 63.200 TT 63.200 M:  0.00000  0.00000
      rtevent:         T 63.700 TT 63.700 M:  0.00000  0.00000
      rtevent:         T 64.200 TT 64.200 M:  0.00000  0.00000
    csp_orc_sa_instr_add name=1
    instRoot id NULL
      rtevent:         T 64.700 TT 64.700 M:  0.00000  0.00000
      rtevent:         T 65.200 TT 65.200 M:  0.00000  0.00000
      rtevent:         T 65.700 TT 65.700 M:  0.00000  0.00000
      ...

...but it takes two, three, five or more minutes before I see this output...

      ...
      rtevent:         T261.800 TT261.800 M:  0.00000  0.00000
      rtevent:         T262.300 TT262.300 M:  0.00000  0.00000
      rtevent:         T262.800 TT262.800 M:  0.00000  0.00000
    chnl 1 using instr 1
      rtevent:         T263.300 TT263.300 M:  0.00000  0.00000
    new MIDI alloc for instr 1:
      rtevent:         T263.800 TT263.800 M:  0.58374  0.00000
      rtevent:         T264.300 TT264.300 M:  0.58533  0.00000
      rtevent:         T264.800 TT264.800 M:  0.58335  0.00000
      ...

...and start to hear the sound play.

Is this some kind of shell/network buffering delaying the evaluation, or is
there some symbol I need to send after my string to trigger immediate
evaluation?

Or is this just the wrong approach entirely, and rather than orchestra code I
should be sending score events to an instrument that runs "compileorc" or 
"compilestr" on a string input?

Is there documentation on this anywhere?

Cheers,

Erik


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