Date: Mon, 17 Sep 2012 20:09:54 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-multimedia@freebsd.org Subject: Re: Sound system developement question Message-ID: <20120917193515.C82816@sola.nimnet.asn.au> In-Reply-To: <201209151453.41118.hselasky@c2i.net> References: <4B739CF4-5D1D-4FE0-83FD-6987DCB40866@gmail.com> <CABzXLYNvsJm6QKPJga2FYFm_ssDW2cz9ZVrDfx5-DeMFW=0LAg@mail.gmail.com> <201209151453.41118.hselasky@c2i.net>
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On Sat, 15 Sep 2012 14:53:41 +0200, Hans Petter Selasky wrote: > There are some sysctls which tell how oversampling is done: > > hw.snd.feeder_rate_quality Hans and all, That's good to know, so I checked mine (default): hw.snd.feeder_rate_quality: 1 hw.snd.feeder_rate_quality: sample rate converter quality (0=low .. 4=high) and so set it to 4. I'm just listening to a ~192kbps VBR MP3 radio stream, and hear no perceptible difference (probably not surprising), nor does top show any apparent difference in cpu or interrupt rates: last pid: 2172; load averages: 0.16, 0.25, 0.21 up 12+19:41:12 19:54:06 150 processes: 2 running, 132 sleeping, 16 waiting CPU: 14.0% user, 0.0% nice, 5.3% system, 7.8% interrupt, 72.9% idle Mem: 292M Active, 243M Inact, 161M Wired, 25M Cache, 85M Buf, 17M Free Swap: 2048M Total, 170M Used, 1877M Free, 8% Inuse PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 11 root 1 171 ki31 0K 8K RUN 43.2H 90.97% idle 1740 smithi 1 46 0 203M 143M select 509:57 3.56% Xorg 1852 smithi 1 50 0 35756K 10544K select 310:36 2.88% gkrellm 16115 smithi 5 59 0 298M 211M ucond 153:18 1.37% seamonkey-bin 12 root 16 -60 - 0K 128K WAIT 96:09 1.37% intr 1844 smithi 6 44 0 18812K 7064K select 230:56 0.10% xmms .. via xmms, on an 1133MHz P3-M running at 733MHz, 8.2-RELEASE i386. Need I reset the sound system to have that take effect? If so, how? cheers, Ian
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