On Montag, 6. April 2020 17:24:08 CEST joo bian wrote:
>  Thank you Christian for the detailed reply,
> I kept changing the JACK and LS buffer, polyphony, etc, but I am still
> getting the X-Runs. So at this point, I think it's time to go back to your

Not JACK, use ALSA! Like I mentioned before, start with a simple setup by 
using ALSA. If it works for you (without dropouts) with ALSA, go ahead with 
JACK.

If you still get dropouts with ALSA, name the concrete parameters that you 
were using for a) sample rate, b) buffer size, c) max. voices, d) max. streams 
and e) precise sound device being used.

What file format are your samples in (wav, ogg vorbis, flac, ...)?

Have you tried a .gig file instead for comparison?

What about trying to install an OS that is already preconfigured for low 
latency like Ubuntu Studio for instance?

> But from now on, I couldn't figure out what happens on my Arch Linux
> (Manjaro 18). I saved the file but after compiling, it seems it is
> compiling it with "-o2" optimization. 

That's OK. It is probably not the root of your problem there. -O in general 
means optimization and the number after it means the level of optimization 
where 3 is usually the maximum optimization level.

CU
Christian





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