Hi Chuckk,
Perhaps you could try using ASIO4ALL to allow several programs to
share the audio device?
Jack could also be an alternative. Or you could use Rearoute (Reaper)
or another virtual sound card as your "dummy" device.
There might be some sourcery that I am unaware of, but I *think* you
will need an audio device connected to allow correct timing for Csound
running in realtime.
Oeyvind

2015-04-28 13:41 GMT+02:00 Chuckk Hubbard <badmuthahubbard@gmail.com>:
> Hello.
>
> I'm once again trying to make Csound work somehow calling Python callables
> from within the Python csnd6 module. I'm using Python 2.7.8 and Csound 6.04
> with doubles on Windows 7.
>
> Oeyvind offered me an example last year, but on attempting to work with it
> now, I see that, on running, it prints everything expected and closes very
> quickly, instead of remaining open. OK, I added
> "c.SetOption("-+rtaudio=portaudio") and another such line choosing an
> output, and it stays open.
> Unfortunately, I want to use this program to send MIDI and other messages to
> another audio program which will be exclusively controlling my soundcard. If
> I start it (Cubase, but maybe other users of my program will use something
> else) and activate its audio output, and then run my Python script using
> -+rtaudio=portaudio -odac0, I get crashes; if I take out the -+rtaudio and
> -o flags, Csound runs quickly and ends. Is there another way to keep Csound
> open and running in real time without actually taking over a real audio
> output? I tried "-+rtaudio=null", I also tried just "-+rtaudio=portaudio"
> without an "-o" flag, neither works.
> If I use portaudio and name an output being used by Cubase, I get:
>
>  *** PortAudio: error: -9985: Device unavailable
> closing device
> Failed to initialise real time audio output
> Fatal Python error: (pygame parachute) Segmentation Fault
>
> This application has requested the Runtime to terminate it in an unusual
> way.
> Please contact the application's support team for more information.
> ......................................
>
> Can anyone offer any suggestions?
> Here is the script I'm trying:
>
> #!/usr/bin/env python
>
> import csnd6
> import pygame.midi as md
>
> player = csnd6.CppSound()
> md.init()
> player.mout = md.Output(6)
>
> def midisendon(n, b, v, c):
>     inn = int(n)
>     fb = float(b)
>     iv = int(v)
>     ic = int(c)
>     player.mout.note_on(inn, iv, ic)
>
>
> def midisendoff(n, b, v, c):
>     inn = int(n)
>     fb = float(b)
>     iv = int(v)
>     ic = int(c)
>     player.mout.note_off(inn, iv, ic)
>
> orc = '''
> sr = 44100
> ksmps = 16
> nchnls = 2
>
> pyinit
>
> instr MIDIon
> inn = p4
> ivel = p5
> ichn = p6
>
> pycalli "midisendon", inn, 0, ivel, ichn
>
> endin
>
> instr MIDIoff
> inn = p4
> ivel = p5
> ichn = p6
>
> pycalli "midisendoff", inn, 0, ivel, ichn
>
> endin
>
> '''
>
> sco = '''
> f0 10
>
> i "MIDIon" 0 .2 69 110 2
> i "MIDIoff" 2 .2 60 0 2
> '''
>
> player.SetOption("-m0d")  # Using SetOption() to configure Csound
> player.SetOption("-+rtaudio=portaudio")
> player.SetOption("-odac0")
> player.CompileOrc(orc)
> player.ReadScore(sco)
> player.Start()
> while (player.PerformKsmps() == 0):
>   pass
> player.Perform()
> #player.Stop()
> del player.mout
>

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--

Oeyvind Brandtsegg
Professor of Music Technology
NTNU
7491 Trondheim
Norway
Cell: +47 92 203 205

http://flyndresang.no/
http://www.partikkelaudio.com/
http://soundcloud.com/brandtsegg
http://soundcloud.com/t-emp

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