[LAU] lmms static through jackd

[Fons Adriaensen]

On Sun, Oct 11, 2009 at 03:16:50PM -0500, Jonathan E. Brickman wrote:

> I do understand how quality Jack interfacing could be a surpassingly 
> difficult challenge for a developer, most especially a group of 
> developers, of an insular yet modular project like lmms.  I could 
> imagine that it might require reworking of the audio output code for 
> each module, given that the whole was never designed for jack in the 
> first place; and there are a lot of modules.  Culturally speaking, 
> within many FOSS developer groups, such changes are very difficult to 
> enact short of a fork.  I have also heard tell that qt4 is unhelpful in 
> general latency-wise, but this does not explain why ALSA output works well.

I suspect you missed the point. 

If LMMS works well, and with acceptable latency (whatever
that means) using ALSA then it should work equally well
and with exactly the same latency using Jack.

*  There is no essential difference except in the
*  way this this achieved.

The difference in practice is that an app can set up its
ALSA interface to provide lots of buffering (with the 
associated latency), but it can't do the same with Jack.
Using Jack it has to provide the buffering itself. Since
LMMS, according to previous posts, has buffering between
its DSP modules and the Jack interface the only thing that
could be missing is to set up this buffering as it should
be set up. If this is done there is no need to modify any
modules.

Ciao,

-- 
FA

Io lo dico sempre: l'Italia è troppo stretta e lunga.