Date: Fri, 12 May 2006 07:36:08 +0800 From: Ariff Abdullah <ariff@FreeBSD.org> To: Dylan Alex Simon <dylan@dylex.net>, "Daniel O'Connor" <doconnor@gsoft.com.au> Cc: freebsd-multimedia@FreeBSD.org Subject: Re: snd_ich garbled audio Message-ID: <20060512073608.478a3856.ariff@FreeBSD.org> In-Reply-To: <20060511222238.GA4133@datura.dylex.net> References: <200605101601.40457.doconnor@gsoft.com.au> <20060510091107.ihklfr948ock04gc@netchild.homeip.net> <200605101937.45885.doconnor@gsoft.com.au> <20060511222238.GA4133@datura.dylex.net>
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--Signature=_Fri__12_May_2006_07_36_09_+0800_MVYQyXVUKi5SCYy5 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, 11 May 2006 15:22:38 -0700 Dylan Alex Simon <dylan@dylex.net> wrote: > > > > It is not totally garbled and doesn't happen all the time but > > > > it is almost like the endianess is wrong, or something similar > > > > as it only affects loud-ish sounds.. > > > > > > Please reduce your mixer settings. If the problem vanishes, too > > > high > >=20 > > The mixer settings are quite low usually (pcm & vol/ogain) >=20 > I'm having the same kind of problem which started after upgrading > from 6.0 to 6.1-RELEASE. This is with an application using > ports/libao-0.8.5_2 direct through /dev/dsp0.0 for output, but a > little testing with ossdsp output show similar issues. It's not > significant distortion but there's clearly little garbled skips. It > seems to happen more when the system's under load. If I play a > simple pure tone with no load, the most reproducible issue is a > little skip (like a few hundred blank samples) every 30 seconds. >=20 There is a latent interrupt latency that randomly occured, especially on few drivers (notably atiixp, ich, etc.). I'm currently investigating this issue. You may try to increase default hardware buffersize a little bit higher, like 32768, through hint.pcm.0.buffersize=3D"32768" in /boot/device.hints, or use kenv(1) and reload the snd_ich module. Another suggestion is to switch to SCHED_ULE instead of SCHED_4BSD. YMMV. I probably managed to fix few things. In case you guys wanna have a try, pick this binary modules at: http://people.freebsd.org/~ariff/test/sndkld_r6.tar.gz The source diff can be found at: http://people.freebsd.org/~ariff/test/r6.diff > :-Dylan >=20 > pcm0@pci0:31:5: class=3D0x040100 card=3D0x80b01043 chip=3D0x24d58086 > rev=3D0x02 hdr=3D0x00 > vendor =3D 'Intel Corporation' > device =3D '82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller' > class =3D multimedia > subclass =3D audio >=20 > pcm0: <Intel ICH5 (82801EB)> port 0xe800-0xe8ff,0xef00-0xef3f mem > 0xfe77bc00-0xfe77bdff,0xfe77b800-0xfe77b8ff irq 17 at device 31.5 on > pci0 pcm0: <Analog Devices AD1980 AC97 Codec> >=20 > FreeBSD Audio Driver (newpcm) > Installed devices: > pcm0: <Intel ICH5 (82801EB)> at io 0xfe77bc00, 0xfe77b800 irq 17 > bufsz 16384 kld snd_ich (1p/1r/0v channels duplex default) > [pcm0:play:0:dsp0.0]: spd 44100, fmt 0x10000010, flags > 0x00000000, 0x00000000 interrupts 0, underruns 0, ready 0 > [b:8192/4096/2|bs:131072/4096/32] {userland} -> > feeder_root(0x10000010) -> {hardware} > [pcm0:record:0:dsp0.1]: spd 8000, fmt 0x00000008/0x10000010, > flags 0x00000000, 0x00000000 interrupts 0, overruns 0, hfree > 1024, sfree 131072 [b:1024/512/2|bs:131072/128/1024] > {hardware} -> feeder_root(0x10000010) -> > feeder_16leto8(0x10000010 -> 0x10000040) -> > feeder_stereotomono8(0x10000040 -> 0x00000040) -> > feeder_sign8(0x00000040 -> 0x00000008) -> {userland} >=20 > hw.snd.report_soft_formats: 1 > hw.snd.targetirqrate: 32 > hw.snd.verbose: 2 > hw.snd.maxautovchans: 0 > hw.snd.unit: 0 > hw.snd.pcm0.buffersize: 16384 > hw.snd.pcm0.vchans: 0 > hw.snd.pcm0.ac97rate: 48000 >=20 > Mixer vol is currently set to 0:0 > Mixer pcm is currently set to 75:75 > Mixer line is currently set to 0:0 > Mixer mic is currently set to 0:0 > Mixer cd is currently set to 0:0 > Mixer rec is currently set to 0:0 > Mixer igain is currently set to 0:0 > Mixer ogain is currently set to 50:50 > Mixer line1 is currently set to 0:0 > Mixer phin is currently set to 0:0 > Mixer phout is currently set to 0:0 > Recording source: mic >=20 > _______________________________________________ > freebsd-multimedia@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia > To unsubscribe, send any mail to > "freebsd-multimedia-unsubscribe@freebsd.org" >=20 -- Ariff Abdullah FreeBSD --Signature=_Fri__12_May_2006_07_36_09_+0800_MVYQyXVUKi5SCYy5 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFEY8pulr+deMUwTNoRAs1DAKCTtt04+iPKuryaQyGygCVguSRlMwCfUvHZ Diswwuq0gUbaSo35ZRlJVkY= =xI0H -----END PGP SIGNATURE----- --Signature=_Fri__12_May_2006_07_36_09_+0800_MVYQyXVUKi5SCYy5--
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