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Date:      Mon, 17 Sep 2012 13:21:28 +0200
From:      =?utf-8?Q?Robert_Sjon=C3=B8y?= <roberth.sjonoy@gmail.com>
To:        Ian Smith <smithi@nimnet.asn.au>
Cc:        "freebsd-multimedia@freebsd.org" <freebsd-multimedia@freebsd.org>
Subject:   Re: Sound system developement question
Message-ID:  <158ED432-5FE9-4FF9-A7EB-2009BC45F7F5@gmail.com>
In-Reply-To: <20120917193515.C82816@sola.nimnet.asn.au>
References:  <4B739CF4-5D1D-4FE0-83FD-6987DCB40866@gmail.com> <CABzXLYNvsJm6QKPJga2FYFm_ssDW2cz9ZVrDfx5-DeMFW=0LAg@mail.gmail.com> <201209151453.41118.hselasky@c2i.net> <20120917193515.C82816@sola.nimnet.asn.au>

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This is irrelevent, we are talking about jitter with the bitperfect paramete=
r enabled.

Regards,

Roberth Sjon=C3=B8y

On 17. sep. 2012, at 12:09, Ian Smith <smithi@nimnet.asn.au> wrote:

> On Sat, 15 Sep 2012 14:53:41 +0200, Hans Petter Selasky wrote:
>=20
>> There are some sysctls which tell how oversampling is done:
>>=20
>> hw.snd.feeder_rate_quality
>=20
> Hans and all,
>=20
> That's good to know, so I checked mine (default):
>=20
> hw.snd.feeder_rate_quality: 1
> hw.snd.feeder_rate_quality: sample rate converter quality (0=3Dlow .. 4=3D=
high)
>=20
> and so set it to 4.  I'm just listening to a ~192kbps VBR MP3 radio=20
> stream, and hear no perceptible difference (probably not surprising),=20
> nor does top show any apparent difference in cpu or interrupt rates:
>=20
> last pid:  2172;  load averages:  0.16,  0.25,  0.21   up 12+19:41:12 19:5=
4:06
> 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
>=20
>  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% seamonke=
y-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
>=20
> .. via xmms, on an 1133MHz P3-M running at 733MHz, 8.2-RELEASE i386.
>=20
> Need I reset the sound system to have that take effect?  If so, how?
>=20
> cheers, Ian
> _______________________________________________
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rg"



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