Today I've checked audio support.

        azalia0 at pci0 dev 27 function 0 "Intel SCH HD Audio" rev 0x07: apic 2 
int 22 (irq 10)
        azalia0: codecs: Realtek ALC272
        audio0 at azalia0

With vorbis-tools-1.4.0 `ogg123 song45.ogg` - I can hear music, but with a big 
noise.
It works well in Linux

        $ lspci -vvv -s 00:1b.0
        00:1b.0 Audio device: Intel Corporation System Controller Hub (SCH 
Poulsbo) HD Audio Controller (rev 07)
          Subsystem: Acer Incorporated [ALI] Device 0244
          Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
          Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
          Latency: 0, Cache Line Size: 64 bytes
          Interrupt: pin A routed to IRQ 22
          Region 0: Memory at b0050000 (64-bit, non-prefetchable) [size=16K]
          Capabilities: <access denied>
          Kernel driver in use: HDA Intel
          Kernel modules: snd-hda-intel

How can to found the problem and fix it?

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