[LAU] transform midi Control Change 7 into velocity events?

Dominic Sacré dominic.sacre at gmx.de
Sat Nov 22 18:31:22 EST 2008

On Saturday 22 November 2008 13:33:25 Philippe Hezaine wrote:
> Dominic Sacré a écrit :
> > You probably need to disable "MIDI Thru Routing" in Rosegarden,
> > otherwise connecting Rg -> mididings -> Rg creates a MIDI feedback
> > loop, and Rosegarden doesn't like that...
> Unfortunatly it doesn't matter. I've tried different options and the
> results are the same.

I don't know then. Maybe talk to the Rosegarden guys? I'm sure this must be 
possible somehow (it works for me, after all).

> For information, after a loop session in Rsgd, 
> when i quit (Ctrl-C) mididings i get this message:
> /home/phil/python/mididings-CC7-to-velocity.py
> ^Cpython: /usr/include/boost/shared_ptr.hpp:315: T*
> boost::shared_ptr<T>::operator->() const [with T = Backend]: Assertion
> `px != 0' failed.
> Abandon

Thanks, I uploaded a new version of mididings today that fixes this bug. If 
it doesn't, please let me know. This is not relevant to the feedback loop 
issue though.

> >> 1) You could see a little latency in the attacks.
> >
> > You're using JACK transport to synchronize Rg and Muse?
> Yes. And i've tried the recording in reverse order: Muse -> Rg. The
> results are completely different. But i'm not sure it's a valuable
> information. Perhaps i must check out my rtc configuration before.

There was a bug in JACK transport that could cause an offset of one period. 
It's supposedly fixed in recent versions (svn), but maybe there's still 
something wrong in Muse or Rosegarden.



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