Date: Mon, 04 Jan 2010 22:44:29 +0900 From: WATANABE Kazuhiro <CQG00620@nifty.ne.jp> To: freebsd-multimedia <freebsd-multimedia@freebsd.org> Cc: martinko <gamato@users.sf.net> Subject: Re: Audible clicks with ICH4 AC'97 Message-ID: <20100104134434.E32A482970@mail1.asahi-net.or.jp> In-Reply-To: <hhqno4$che$1@ger.gmane.org> References: <hhqno4$che$1@ger.gmane.org>
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Hi. Can you hear any differences when you run the following commands (as root) ? # sysctl dev.pcm.0.eapd=0 # sysctl dev.pcm.0.eapd=1 At Sun, 03 Jan 2010 19:30:29 +0100, martinko wrote: > 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 --- WATANABE Kazuhiro (CQG00620@nifty.ne.jp)
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