If I remember correctly there is an assumption in Csound's JACK code 
about device names ending with numbers.

I ran into the same issue with a Firewire audio interface which meant 
I couldn't use the device without editing Csound's source code.

-J

On 21/08/16 19:39 -0400, Steven Yi wrote:
> Hi All,
> 
> I got a question about JACK device detection on the Blue mailing list
> and it lead me to wonder if Csound is doing the correct thing for Jack
> devices in rtjack.c.  The following is the user's "jack_lsp -t -p"
> output:
> 
> system:capture_1
>     properties: output,physical,terminal,
>     32 bit float mono audio
> system:capture_2
>     properties: output,physical,terminal,
>     32 bit float mono audio
> system:playback_1
>     properties: input,physical,terminal,
>     32 bit float mono audio
> system:playback_2
>     properties: input,physical,terminal,
>     32 bit float mono audio
> system:midi_capture_1
>     properties: output,physical,terminal,
>     8 bit raw midi
> system:midi_playback_1
>     properties: input,physical,terminal,
>     8 bit raw midi
> PulseAudio JACK Sink:front-left
>     properties: output,terminal,
>     32 bit float mono audio
> PulseAudio JACK Sink:front-right
>     properties: output,terminal,
>     32 bit float mono audio
> PulseAudio JACK Source:front-left
>     properties: input,terminal,
>     32 bit float mono audio
> PulseAudio JACK Source:front-right
>     properties: input,terminal,
>     32 bit float mono audio
> 
> and this is the list of devices shown by "csound -+rtaudio=jack --devices":
> 
> virtual_keyboard real time MIDI plugin for Csound
> 0dBFS level = 32768.0
> Csound version 6.07 (double samples) May  6 2016
> libsndfile-1.0.25
> rtaudio: JACK module enabled
> rtmidi: ALSA Raw MIDI module enabled
> 3 audio input devices
>  0: adc:system:capture_ (system:capture_)
>  1: adc:PulseAudio JACK Sink:front-left (PulseAudio JACK Sink:front-left)
>  2: adc:PulseAudio JACK Sink:front-right (PulseAudio JACK Sink:front-right)
> 3 audio output devices
>  0: dac:system:playback_ (system:playback_)
>  1: dac:PulseAudio JACK Source:front-left (PulseAudio JACK Source:front-left)
>  2: dac:PulseAudio JACK Source:front-right (PulseAudio JACK Source:front-right)
> csound->FileOpen2 failed:: No such file or directory
> csound->FileOpen2 failed:: No such file or directory
> WARNING: could not open library
> '/usr/local/lib/csound/plugins-6.0/libstkops.so' (libstk.so.0: cannot
> open shared object file: No such file or directory)
> end of score.           overall amps:      0.0
>        overall samples out of range:        0
> 0 errors in performance
> Elapsed time at end of performance: real: 0.366s, CPU: 0.118s
> 
> The issue here is the "PulseAudio JACK Source:front-right" and
> front-left ports.  It does not use numbers in its name, which caused a
> parsing issue in Blue as I had assumed that would be the case.  In
> Csound, it shows as two separate devices, rather than a single device
> with 2 channels.
> 
> Am I misunderstanding something, or is there an issue with Csound's rtjack.c?
> 
> Thanks!