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List:       freebsd-stable
Subject:    pcm sound river behaviour
From:       John Brann <john () brann ! org>
Date:       2000-05-30 14:14:10
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Hi All,

I'm experiencing some unwanted 'features' from the pcm sound driver.

Both of these are new in 4.0-STABLE.  I previously ran a variety of 3.X and 
4.0-CURRENT kernels under which sound worked well with the pcm driver.

1:  Playing .au files by 'cat foo.au > /dev/audio0' loses part of the
    beginning of the sound.  Any .au file less than 1048 bytes produces
    only silence.  

    [Note, I do not believe there is necessarily anything magic about
    1048.  It happens to be the size of the smallest .au file I have which
    makes any sound.  The largest silent .au file is 1039 bytes]

    Larger files produce a period of silence, followed by two clicks,
    followed by the appropriate sound, followed by another click.  I 
    believe the sound produced has lost a leading amount of about one 
    second.

2:  The sound card does not accept audio signal from an external device
    connected to the line-in socket.

Machine is a dual P-Pro 200 with on-board sound.

Kernel is yesterdays 4.0-STABLE:

FreeBSD 4.0-STABLE #2: Mon May 29 14:03:57 EDT 2000

Kernel config entry for pcm is:

device          pcm

dmesg shows:

pcm0: <CS423x> at port 0x534-0x537,0x388-0x38b,0x220-0x22f irq 5 drq 1,0 on isa0
unknown0: <GAME> at port 0x200-0x207 on isa0
unknown1: <CTRL> at port 0x120-0x127 on isa0
unknown2: <MPU> at port 0x300-0x301 irq 11 on isa0

No other device claims irq 5 (or 11)

Any ideas?

John


-- 
        Unreal City,
     Under the brown fog of a winter dawn,

finger john@doorman.brann.org for pgp public key


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