On 08/31/2014 07:31 PM, Filipe Coelho wrote:
On 09/01/2014 12:11 AM, Jonathan E Brickman wrote:
Anyone know what Carla does when running SFZ's? Does it encapsulate LinuxSynth
or something else? At 96 KHz I get a bit of background static all the time
with an SFZ, but an SF2 is clear and beautiful. Could it be a problem with the
SFZ, or a problem adapting the SFZ to the high sampling rate?
Carla uses LinuxSampler to handle GIG and SFZ files, FluidSynth for SF2.
Both of these are used internally as if they were plugins loaded in Carla.
See if you get the same issue with the linuxsampler standalone and that sfz
file.
If the issue is still there it means linuxsampler has some resampling issue;
If not then something could be wrong with Carla, I can take a look if you
upload the sfz.
Found a working setup. Static was coming from the SF2's Chorus knobs, after I
turned them all to hard-off that solved the static problem. A second problem
was some sort of overload: things would be going along just fine for 30-60
seconds or so, playing it all as a live synth, and then a rude "beep" would
come through and it seemed like the Carla engine reset quickly and came back to
ready silence. I kept it going 60-90 seconds by cutting down the number of
SFZ's by half (I discovered some hidden tonal duplication), and then knocked
the problem out altogether by turning off "Send All Sound/Notes Off" for both
the SF2 and the SFZ's, I'm not quite sure what that last item does, but turning
it off seems to have eliminated the problem so far.
I am rather impressed with the Carla design. I am comprehending that it is
using LS and FS, but it clearly is not running them as separate processes,
unless it is encapsulating them somehow within Carla processes, I see there are
quite a few of those flying around my RAM. And that quick
emergency-automatic-reset is a very neat trick indeed, I just wish I knew how
to get a readout and suppress the beep :-)
--
Jonathan E. Brickman
Ponderworthy Music | jeb@xxxxxxxxxxxxxxxx<mailto:jeb@xxxxxxxxxxxxxxxx> |
(785)233-9977 | http://ponderworthy.com