Date: Sun, 11 Jul 2010 23:21:14 -0400 From: "Andrew J. Caines" <A.J.Caines@halplant.com> To: freebsd-stable@freebsd.org Subject: Re: More buzzing fun with snd_emu10kx - but now with more determinism! Message-ID: <4C3A8A2A.3030609@halplant.com> In-Reply-To: <AANLkTinDek_n9dKk3hpK9fIxl3V6dO7FVzqOz_swkLXc@mail.gmail.com> References: <AANLkTinDek_n9dKk3hpK9fIxl3V6dO7FVzqOz_swkLXc@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 07/11/2010 17:03, Garrett Cooper wrote: > The problem appears to be with vchan-related code. If I start up 4+ > applications on my machine that access the audio device, all goes > wonky on the 4+ allocation I can confirm this behaviour, which seems odd with hw.snd.maxautovchans defaulting to 16. It does not appear to be affected by increasing dev.pcm.0.play.vchans up fron the default of 2 (as I apparently did at some point up to 7.x), though reading sound(4) it's clear I don't fully understand vchans. A problem I encountered with snd_emu10kx in a clean 8.1RC2 install which was not present in any previous version is a faint rapid mechanical clicking sound adjustable with the "cd" mixer setting. The only non-default audio setting I have is in loader.conf: hint.emu10kx.0.multichannel_disabled="1" hint.emu10kx.1.disabled="1" pcm0: <EMU10Kx DSP front PCM interface> on emu10kx0 pcm0: <TriTech TR28602 AC97 Codec (id = 0x54524123)> pcm0: Codec features 5 bit master volume, no 3D Stereo Enhancement FreeBSD Audio Driver (newpcm: 32bit 2009061500/i386) Installed devices: pcm0: <EMU10Kx DSP front PCM interface> on emu10kx0 (4p:2v/1r:1v) default snddev flags=0x2e2<AUTOVCHAN,BUSY,MPSAFE,REGISTERED,VPC> [pcm0:play:dsp0.p0]: spd 48000, fmt 0x00200010, flags 0x00002100, 0x00000004 interrupts 726, underruns 0, feed 5, ready 0 [b:4096/2048/2|bs:4096/2048/2] channel flags=0x2100<BUSY,HAS_VCHAN> ... -- -Andrew J. Caines- Unix Systems Engineer A.J.Caines@halplant.com FreeBSD/Linux/Solaris, Web/Mail/Proxy/... http://halplant.com:2001/ "Machines take me by surprise with great frequency" - Alan Turing
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4C3A8A2A.3030609>