Date: Sun, 03 Jan 2010 19:30:29 +0100 From: martinko <gamato@users.sf.net> To: freebsd-multimedia@freebsd.org Subject: Audible clicks with ICH4 AC'97 Message-ID: <hhqno4$che$1@ger.gmane.org>
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Hi list,
I've upgraded from 6.4 to 8.0 and hoped that my long-time issue will be
gone but no, I'm still experiencing the same audio distortion --
Playing music on FreeBSD reminds me of old tapes while listening to the
same files on MS Windows produces no acoustic clicks etc at all.
Well, I cannot hear these clicks during music but throughout low volume
passages they are quite audible and they stop when playback stops.
I still hope something can be done about it.
Any suggestions / ideas please ?
Cheers,
Martin
--
$ uname -a
FreeBSD mb-aw1n-bsd 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21
15:48:17 UTC 2009
root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
$ pciconf -lv | grep -B 4 audio
pcm0@pci0:0:31:5: class=0x040100 card=0x18431043 chip=0x24c58086
rev=0x03 hdr=0x00
vendor = 'Intel Corporation'
device = 'Realtek AC97 Audio (82801DBM SoundMAXController
(ICH4-M B0 step))'
class = multimedia
subclass = audio
$ cat /dev/sndstat
FreeBSD Audio Driver (newpcm: 32bit 2009061500/i386)
Installed devices:
pcm0: <Intel ICH4 (82801DB)> at io 0xffaff800, 0xffaff400 irq 5 bufsz
16384 kld snd_ich [MPSAFE] (1p:4v/1r:1v channels duplex default)
$ sysctl hw.snd dev.pcm
hw.snd.feeder_rate_quality: 1
hw.snd.feeder_rate_round: 25
hw.snd.feeder_rate_max: 2016000
hw.snd.feeder_rate_min: 1
hw.snd.feeder_rate_polyphase_max: 183040
hw.snd.feeder_rate_presets: 100:8:0.85 100:36:0.92 100:164:0.97
hw.snd.feeder_eq_exact_rate: 0
hw.snd.feeder_eq_presets:
PEQ:16000,0.2500,62,0.2500:-9,9,1.0:44100,48000,88200,96000,176400,192000
hw.snd.vpc_reset: 0
hw.snd.vpc_0db: 45
hw.snd.vpc_autoreset: 1
hw.snd.latency_profile: 1
hw.snd.latency: 5
hw.snd.report_soft_matrix: 1
hw.snd.report_soft_formats: 1
hw.snd.compat_linux_mmap: 0
hw.snd.vpc_mixer_bypass: 1
hw.snd.verbose: 1
hw.snd.maxautovchans: 16
hw.snd.default_unit: 0
hw.snd.version: 2009061500/i386
hw.snd.default_auto: 0
dev.pcm.0.%desc: Intel ICH4 (82801DB)
dev.pcm.0.%driver: pcm
dev.pcm.0.%location: slot=31 function=5 handle=\_SB_.PCI0.AUDI
dev.pcm.0.%pnpinfo: vendor=0x8086 device=0x24c5 subvendor=0x1043
subdevice=0x1843 class=0x040100
dev.pcm.0.%parent: pci0
dev.pcm.0.eapd: 1
dev.pcm.0.play.vchans: 4
dev.pcm.0.play.vchanmode: fixed
dev.pcm.0.play.vchanrate: 48000
dev.pcm.0.play.vchanformat: s16le:2.0
dev.pcm.0.rec.vchans: 1
dev.pcm.0.rec.vchanmode: fixed
dev.pcm.0.rec.vchanrate: 48000
dev.pcm.0.rec.vchanformat: s16le:2.0
dev.pcm.0.buffersize: 16384
dev.pcm.0.bitperfect: 0
dev.pcm.0.ac97rate: 48000
dev.pcm.0.wake: 0
$ mixer
Mixer vol is currently set to 75:75
Mixer pcm is currently set to 25:25
Mixer speaker is currently set to 40:40
Mixer line is currently set to 75:75
Mixer mic is currently set to 0:0
Mixer cd is currently set to 75:75
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 75:75
Mixer phin is currently set to 0:0
Mixer phout is currently set to 0:0
Mixer video is currently set to 75:75
Recording source: mic
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