[Bug 242139] oss long sound delays

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242139

            Bug ID: 242139
           Summary: oss long sound delays
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: prjanica at yandex.ru

long sound delays

FreeBSD uh.ru 12.1-STABLE FreeBSD 12.1-STABLE r354886 GENERIC  amd64

emu10kx0 at pci0:1:6:0:    class=0x040100 card=0x20021102 chip=0x00041102 rev=0x04
hdr=0x00
    vendor     = 'Creative Labs'
    device     = 'EMU10k2/CA0100/CA0102/CA10200 [Sound Blaster Audigy Series]'
    class      = multimedia
    subclass   = audio


$ sysctl dev.pcm | grep "buffersize"
dev.pcm.9.buffersize: 65536
dev.pcm.8.buffersize: 65536
dev.pcm.7.buffersize: 65536
dev.pcm.6.buffersize: 65536
dev.pcm.5.buffersize: 65536
dev.pcm.4.buffersize: 65536
dev.pcm.3.buffersize: 65536
dev.pcm.2.buffersize: 65536
dev.pcm.1.buffersize: 65536
dev.pcm.0.buffersize: 65536


how to repeat

dd if=/dev/dsp of=/dev/dsp

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