[CM] CM3 woes

Heinrich Taube taube at uiuc.edu
Mon Aug 10 07:26:57 PDT 2009


as far as i remember we fixed your drift problem awhile back, was this  
not the case?
I cant help with linux audio issues, whatever issues are there are  
with the juce support of linux or alsa itself.  t

On Aug 10, 2009, at 9:10 AM, lieven moors wrote:

> Hi,
>
> I would like to report again that CM3 is still completely useless
> to me, due to problems with midi timing. I'm working on Linux (Ubuntu
> Studio),
> and I've tried a lot in order to localize the problem on my 32bit and
> 64bit machines,
> with realtime preempt kernel, and without.
>
> When I test with the simplest process, the timing sounds as if the
> scheduler is drunk:
>
> (define (simp reps rate dur low hi)
>  (process repeat reps
>           do
>           (send "mp:midi" :key (between low hi) :dur dur)
>           (wait rate)))
>
> (sprout (simp 100 0.25 0.125 64 72))
>
>
> I have no idea why this is happening, but I would like to find out.
> For that I would have to know if the problem is with the scheduler,
> or with the midi interface of Juce. If it would be Juce, I could  
> file a
> bug report.
> Could somebody help me figure this out?
>
> For all my other midi programs, the midi timing is fine, so I doubt  
> there
> is something fundamentally wrong with my system.
> But I would like to ask if there are any other people on this  
> mailing list,
> which run CM3 successfully on Linux. Just to be sure it can be  
> done :-)
>
> A few things to note:
>
> When I start Grace I get these warnings:
>
>    Warning. Cannot connect jack output port 2:
> "alsa_pcm:Midi-Through/midi_playback_1".
>    Warning. Cannot connect jack output port 3:
> "alsa_pcm:MT4/midi_playback_1".
>    Warning. Cannot connect jack output port 4:
> "alsa_pcm:MT4/midi_playback_2".
>    Warning. Cannot connect jack output port 5:
> "alsa_pcm:MT4/midi_playback_3".
>    Warning. Cannot connect jack output port 6:
> "alsa_pcm:MT4/midi_playback_4".
>    Warning. Cannot connect jack output port 7:
> "alsa_pcm:MT4/midi_playback_5".
>    Warning. Cannot connect jack input port 2:
> "alsa_pcm:Midi-Through/midi_capture_1".
>    Warning. Cannot connect jack input port 3:
> "alsa_pcm:MT4/midi_capture_1".
>    Warning. Cannot connect jack input port 4:
> "alsa_pcm:MT4/midi_capture_2".
>    Warning. Cannot connect jack input port 5:
> "alsa_pcm:MT4/midi_capture_3".
>
> In Grace I get a warning:
>
>    Warning: Audio Manager: No such file or directory
>
> But sndlib is connected fine to the system audio outputs in JACK.
> I still have to connect Juce's midi port manually after starting  
> Grace.
> Selecting a port from the menu does not make the connection.
>
> Thanks for your help,
>
> Lieven Moors
>
>
> P.S. I'm using the latest revision of CM3 from svn, and a quite recent
> sndlib (not the last, but one before that).
> P.S. It would be nice if Grace would support copy/paste with the x
> clipboard :-)
>
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