From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Injected-Via-Gmane: http://gmane.org/ To: hardware@altlinux.ru From: Arioch Date: Wed, 30 Mar 2005 19:20:33 +0400 Message-ID: References: <20050325115144.17ea85f9@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1251; format=flowed Content-Transfer-Encoding: quoted-printable X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 80.249.152.133 User-Agent: Mozilla Thunderbird 1.0 (X11/20050202) X-Accept-Language: ru-ru, ru In-Reply-To: <20050325115144.17ea85f9@localhost.localdomain> Sender: news Subject: [Hardware] Re: Fw: [Comm] =?windows-1251?b?zeXv7u3/8uroIPHuIOfi8+ru7C4=?= X-BeenThere: hardware@altlinux.ru X-Mailman-Version: 2.1.5 Precedence: list Reply-To: hardware@altlinux.ru List-Id: ALT Linux hardware support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Mar 2005 15:22:13 -0000 Archived-At: List-Archive: Dolgov OV =EF=E8=F8=E5=F2: > VT8233/A/8235 AC97 Audio Controller (rev 50) > =EA=EE=EB=EE=ED=EA=E0=F5 =E8=E3=F0=E0=E5=F2 =F7=E8=F1=F2=EE, =E0 =EA=EE= =E3=E4=E0 =E2=EE=F1=EF=F0=EE=E8=E7=E2=EE=E6=F3 =E7=E0=EF=E8=F1=E0=ED=ED=EE= =E5 - =E3=F0=EE=EC=EA=EE=F1=F2=FC > =ED=EE=F0=EC=E0=EB=FC=ED=E0=FF, =ED=EE =F7=E0=F1=F2=EE=F2=FB =F1=F0=E5=E7= =E0=ED=FB. =ED=EE =F2=FB =ED=E5 =F1 =EA=EE=EB=EE=ED=EE=EA =EF=E8=F8=E5=F8=FC? > Like most consumer cards VIA's chipset can record from one source at a = time.=20 > The choice of sources is: Line In, CD, Microphone, Video, Phone, Aux, > and Mix. > The last choice is special, it records *more or less* what's going to = the Line Out, > the result of the playback mixer controls. It's not affected by the=20 Master > levels control. > kernel-modules-alsa-wks-up-0.9.8-alt4.2 > ALSA v0.5 is buggy for via8233. Use v0.9 to get also-buggy results. He= h.=20 > It seems that it 0.9 largely broken on 8233 as of 0.9.4....0.9.7 at > least. > For now, OSS would "just work" and ALSA would exhibit all kinds of > weird behaviour > Poor sound quality >=20 > In some circumstances you can observe that sound quality is very poor (= whistling, annoying harmonic distortions, especially noticeable in high-f= requency area), which at first glance is strange because windows drivers = on the same hardware plays nicely. This happens because the sound card co= ntains two PCM devices (called pcm0p and pcm1p under alsa). >=20 > The first PCM device exhibits such behaviour (it is intended for four-c= hannel output). If you instruct the applications to use the second PCM de= vice, the distortions disappear. If your application is using the old /de= v/dsp interface, instruct it to use /dev/adsp instead http://alsa.opensrc.org/index.php?page=3Dvia8233