Re: [fluid-dev] Small CPU stuttering fluidsynth

[Krzysztof Foltman]

On 26/01/11 22:49, Element Green wrote:

> My guess is that your device does not have a floating point unit (FPU).
>   FluidSynth makes heavy use of floating point math, so your device is
> probably emulating all the instructions, which is very very slow.  There
> has been talk from time to time on implementing integer based (fixed
> point or otherwise) in FluidSynth, but motivation is rather low in that
> area,

I'm currently working on a integer-based embedded-friendly set of 
instruments. I might try redoing some of the code in Fluidsynth (some 
inner loops and so on) using integer math. With increasing popularity of 
ARM CPUs and other low-power stuff, it might be a

[ Side note: the current version of that project contains a 
somewhat-faithful emulation of a tonewheel organ and that's it. But I'm 
planning a few more things. The repo is at 
http://repo.or.cz/w/calfbox.git - interestingly, I'm using Angstrom as a 
base platform too, so I can include a .bb file for it. ]

Also, to the original poster: you could try disabling reverb and chorus, 
maybe that helps.

You might also try recompiling with NEON use switched on. Unfortunately 
I never did it myself, as my current target is Intel Atom, not ARM.

K.