Does your ARM processor have a floating point unit (FPU) ? FluidSynth is heavily floating point based, so if you don't have hardware support for floating point, it will get pretty poor performance. Check your CPU usage and see if it is maxing out when you press that 5th key.
Best regards, Element Green On Wed, Aug 19, 2015 at 6:30 AM, Herschel Karunaratne < herschelkarunara...@yahoo.co.uk> wrote: > I am using an ARM board with Ubuntu Linaro 13.04 and Alsa as the sound and > MIDI driver. I have a SF with 13 different instruments and playing through > USB MIDI. As the Fluidsynth starts I use CC 0 7 0.... command to reduce the > volume of all the MIDI channels to zero. When a key is pressed the MIDI > sends Note ON command to all 16 MIDI channels. I switch ON/OFF > instruments by setting the MIDI channel volume 0 or 127 again by using cc > command again. > My issue is when I start FS, I get the following warnings, > fluidsynth warning: Requested a period size of 64, got 1024 instead > fluidsynth warning: Requested 16 periods, got 8 instead > > When I play 4 notes(up to 4 notes) simultaneously it plays perfectly but > when I press the 5th key (or more) there is a crackling sound like a buffer > underrun and when I release one note (4 again) it plays perfectly again. > > I tried using -c and -z to change the period size but cannot reduce the > period size less than 1024 and cannot increase number of periods to more > than 8. > > Any suggestion how this can be fixed? > > Regards > > Herschel > > _______________________________________________ > fluid-dev mailing list > fluid-dev@nongnu.org > https://lists.nongnu.org/mailman/listinfo/fluid-dev > >
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