[Voyage-linux] Re: Voyage MPD & alsaequal

Sat Feb 19 10:45:19 HKT 2011

Hi Demina,

I appreciate your reply, I am using the same alsaequal and was following the
instruction on the site. Can you suggest me any alternative equalizers for
alsa?

Also can you please guide me how to prevent the resampling?

On Sat, Feb 19, 2011 at 6:56 AM, Demian Martin <demianm_1 at yahoo.com> wrote:

>
> Navas:
> Looking at your results I suspect several things are going on behind the
> scenes. Most likely the new ALSA code for the equalizer may be working a
> high or very high precision which will really stress an Alix card. I know
> that the quality resamplers will cause the same problems on an alix. Are
> there options on the ALSA equalizer? I found this reference to it
> http://www.thedigitalmachine.net/alsaequal.html . Its not a core alsa
> component. If that reference is the one you are using there may be other
> less demanding equalizers. Its ability to use plugins is very interesting.
> Also make sure no resampling is going on in the background or it may be the
> core problem.
>             -Demian
>
> Date: Sat, 19 Feb 2011 06:05:39 +0530
> From: Navas Abubacker <navas at truebilling.com>
> Subject: Re: [Voyage-linux] Voyage MPD & alsaequal
> To: Punky Tse <punkytse at punknix.com>
> Cc: voyage-linux at voyage.hk
> Message-ID:
>        <AANLkTin3-AW+xuG8N4x0gsFmHu8QOAKerUDsBjnL81dB at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi Punky,
>
> Thanks for your reply and yes you are right
>
>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  4644 mpd       20   0 73816  14m 6688 S 97.1  6.1   0:28.72 mpd
>
> mpd consumes 97% of CPU, but I was using alsaequal with MPD on Voyage 0.6.5
> with no problem. I have seen the CPU utilization before, it was in the
> range
> of 30-50%. I am not sure what caused this usage?
>
>
> This is while playing mp3 without alsaequal
>
>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  4697 mpd       20   0 72148  13m 6148 S 10.5  5.7   0:04.57 mpd
>
> and this one is for a flac without alsaequal
>
>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  4697 mpd       20   0 72148  13m 6252 S  8.2  5.8   0:12.72 mpd
>
> Please help
>
>
> On Fri, Feb 18, 2011 at 10:38 PM, Punky Tse <punkytse at punknix.com> wrote:
>
> > Hi Navas,
> >
> > Take a look to top or load avg. to see if it is CPU bound.
> >
> > Regards,
> > Punky
> >
> >
> >
> > On 18/2/2011 23:42, Navas Abubacker wrote:
> >
> >> Hi,
> >>
> >> I am trying to get the equalizer with Voyage MPD on a alix3 box. But for
> >> some reason the sound is breaking up,
> >>
> >> I can see "alsamixer -D equal" working and when I debug the mpd I am
> >> getting the output like this
> >>
> >> root at voyage:~# mpd --no-daemon --stderr -v /etc/mpd.conf
> >> config: loading file /etc/mpd.conf
> >> path: path_set_fs_charset: fs charset is: UTF-8
> >> database: reading DB
> >> disabling the last.fm <http://last.fm> playlist plugin because account
> is
> >> not configured
> >>
> >> daemon: opening pid file
> >> daemon: writing pid file
> >> state_file: Loading state file /var/lib/mpd/state
> >> database: get song: En Jannal Vandha - TamilLatestMusic.blogspot.com.mp3
> >> playlist: play 0:"En Jannal Vandha - TamilLatestMusic.blogspot.com.mp3"
> >> decoder_thread: clearing mixramp tags
> >> decoder_control: mixramp_start = NULL
> >> decoder_control: mixramp_prev_end = NULL
> >> mad: detected LAME version 3.99 ("LAME3.99a")
> >> mad: LAME peak found: 0.000000
> >> mad: LAME track gain found: -10.600000
> >> mad: encoder delay is 576, encoder padding is 324
> >> decoder: audio_format=44100:24:2, seekable=true
> >> alsa: buffer: size=1881..15052 time=42653..341316
> >> alsa: period: size=940..941 time=21333..21334
> >> alsa: default period_time = buffer_time/4 = 341315/4 = 85328
> >> alsa: buffer_size=15052 period_size=940
> >> output: opened plugin=alsa name="equal" audio_format=44100:24:2
> >> alsa: Underrun on ALSA device "plug:plugequal"
> >> alsa: Underrun on ALSA device "plug:plugequal"
> >> alsa: Underrun on ALSA device "plug:plugequal"
> >> alsa: Underrun on ALSA device "plug:plugequal"
> >> alsa: Underrun on ALSA device "plug:plugequal"
> >> alsa: Underrun on ALSA device "plug:plugequal"
> >>
> >>
> >> for every alsa: Underrun on ALSA device "plug:plugequal" it is breaking
> >> up.
> >>
> >> here are my configurations
> >>
> >> root at voyage:~# dmesg | grep usb
> >> [    5.723640] input: C-Media USB Audio Device    as
> >> /devices/pci0000:00/0000:00:0f.4/usb2/2-3/2-3:1.3/input/input1
> >> [    5.724435] generic-usb 0003:0D8C:000C.0001: input,hidraw0: USB HID
> >> v1.00 Device [C-Media USB Audio Device   ] on usb-0000:00:0f.4-3/input3
> >> [    5.725529] usbcore: registered new interface driver usbhid
> >> [    5.725617] usbhid: USB HID core driver
> >> [   10.824108] usbcore: registered new interface driver snd-usb-audio
> >>
> >>
> >> root at voyage:~# lsusb
> >> Bus 002 Device 002: ID 0d8c:000c C-Media Electronics, Inc. Audio Adapter
> >>
> >>
> >> root at voyage:~# nano /etc/asound.conf
> >> ctl.equal {
> >>  type equal;
> >> }
> >>
> >> pcm.plugequal {
> >>  type equal;
> >>  slave.pcm "plug:dmix";
> >> }
> >>
> >> #pcm.equal {
> >>  # Or if you want the equalizer to be your
> >>  # default soundcard uncomment the following
> >>  # line and comment the above line.
> >>  pcm.!default {
> >>  type plug;
> >>  slave.pcm plugequal;
> >> }
> >>
> >> root at voyage:~# nano /etc/mpd.conf
> >> ..............................
> >> audio_output {
> >>  type    "alsa"
> >>  name    "equal"
> >>  device  "plug:plugequal"
> >> }
> >> ........................
> >>
> >>
> >> Please help
> >>
> >> --
> >> Thanks
> >> Navas
> >>
> >
> >
>
>
> --
> Thanks
> Navas
> ********************************************
>
>

-- 
Thanks
Navas
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