[darkice] Re: I have Darkice and Icecast2 running on Raspberry Pi but...
- From: "(:techitone:)" <techitone@xxxxxxxxx>
- To: addr@xxxxxxxxxxxxx
- Date: Thu, 29 Nov 2012 13:55:30 +0000
Hi Joel
Thanks for your input. I have found that I get no noise and very usable
quality if I set the sample rate to 32000 kHz, see my settings below etc...
samplerate = 32000
bitsPerSample = 16
channel = 2
[Icecast2-0]
bitrateMode = cbr
format = mp3
bitrate = 196
As soon as I start using 44.1kHz the sound stutters and has 'clciks' on it
!?
Thanks, Tony :)
--
On 29 November 2012 01:29, <addr@xxxxxxxxxxxxx> wrote:
> Hi Tony,
>
> I was thinking about your noise problem and thought I could share my
> thought with you. My experience with noise when using Darkice is that it
> tends to be in the analog part of the audio circuit. When I say analog
> part I mean from the microphone to the input of the PCM. I use USB
> Dual-pre from ART for my PCM. The input of the ART box is XLR microphone
> connectors and the output is a USB port.
>
> You can test the quality of the audio signal path by using a simple
> audio recorder like arecord to make a sample recording of the audio quality
> and play it back with out having Darkice in the equation. Just make sure
> that the Dual-pre (or your input device) is the default input audio device
> for Linux.
>
> If this test indicates that there no noises from the audio part of the
> circuit then the other source for noise is in the quality of your network
> connection between the Darkice system, the Icecast system and/or the
> connection between the Icecast system and the internet. My Icecast servers
> are on a good link to the internet so once I get recorded material uploaded
> to the Icecast server I have little problems with sound quality. My noise
> problems have been the link between the Darkice system and the Icecast
> servers.
>
> Hope this helps,
>
> Joel Goodwin
>
>
>
> ---- "(:techitone:)" <techitone@xxxxxxxxx> wrote:
> > I've found how to change the input gain using Alsamixer - F6 to change
> > sound card, then F4 [Capture], then up/down arrows to change gain.
> >
> > Thanks for pointing the way forward, Mook :)
> >
> > The sound quality is still a bit low, but at least I can hear it now...
> >
> > Best wishes, Tony
> > --
> >
> >
> >
> >
> > On 27 November 2012 22:57, (:techitone:) <techitone@xxxxxxxxx> wrote:
> >
> > > Thanks Mook
> > >
> > > Alsamixer is only showing controls for audio output gain, it's not
> showing
> > > any controls for audio input. I can't find any controls for the Griffin
> > > iMic (usb sound card).
> > >
> > > I agree, the iPod needs too quieter, and the usb sound card needs to be
> > > set louder.
> > >
> > > Any idea how I might check and alter the iMic's gain?
> > >
> > > Many thanks, Tony
> > > --
> > >
> > >
> > >
> > >
> > >
> > > On 27 November 2012 17:56, Rev. Mook <revmook@xxxxxxxxxxxxxxxx> wrote:
> > >
> > >>
> > >> That sounds more like a problem with your signals gain staging than a
> > >> config issue with Darkice/ Icecast2. I would try turning your iPod
> volume
> > >> down and your soundcards input up using alsamixer.
> > >>
> > >> ~Mook
> > >>
> > >>
> > >>
> > >> On Tue, Nov 27, 2012 at 5:17 AM, (:techitone:) <techitone@xxxxxxxxx
> >wrote:
> > >>
> > >>> I've installed Darkice and Icescast2 and they are running on my
> > >>> Raspberry PI but when I listen to the stream it is very quiet and a
> little
> > >>> distorted.
> > >>>
> > >>> Any ideas why?
> > >>>
> > >>> Here's my setup,
> > >>>
> > >>> Raspbery Pi running Raspian - all (apt-get) upgrades and updates done
> > >>> Installed Darkice and Icecast2 using this tutorial<
> http://www.t3node.com/blog/live-streaming-mp3-audio-with-darkice-and-icecast2-on-raspberry-pi/
> >
> > >>> I am playing audio into the RPi via an iPod shuffle (volume up full),
> > >>> plugged into Griffin iMac (usb sound card), plugged into a powered
> usb hub,
> > >>> plugged into the RPi. The RPi is connected to my home network via a
> > >>> wireless usb (n) wifi dongle. I run (sudo) Darkice in a terminal
> window (on
> > >>> the desktop) and can see Icecast running in a web browser on the
> RPi. I
> > >>> then opened the Icecast server in Firefox on my Macbook Pro, the
> stream
> > >>> loads into iTunes and starts to play. BUT it it really quiet and a
> bit
> > >>> distorted (MBP and iTunes volumes are up full). I don't know how to
> make it
> > >>> louder, or the quality better :(
> > >>>
> > >>> My Darkice config ( etc/darkice.cfg) looks like this,
> > >>>
> > >>> duration = 0
> > >>> bufferSecs = 5 (I've tried 2, 10, 15, 20 etc)
> > >>> reconnect = yes
> > >>> device = hw:1,0 (hw:1.0 = soundcard indicated by using terminal
> 'arecord
> > >>> -l') iPod shuffle/Griffin iMic/powered usb hub/RPi as mentioned
> above)
> > >>> samplerate = 44100 (I have tried 11025 and 22050)
> > >>> bitsPerSample = 16 (I have tried 8 and 24)
> > >>> channel = 2 (I have tried 1)
> > >>> [Icecast2-0]
> > >>> bitrateMode = abr
> > >>> format = mp3
> > >>> bitrate = 128 (i have tried 96)
> > >>> server = localhost
> > >>> port = 8000
> > >>> password = ********
> > >>> mountPoint = raspi
> > >>> name = Darkice trial
> > >>> description = this is only a trial
> > >>> url = http://localhost
> > >>> genre = my own
> > >>> public = no
> > >>> #localDumpfile = dump.ogg (I have tried the mp3 setting
> 'recording.mp3'
> > >>> here, and it's now marked as # ie not required)
> > >>>
> > >>> I would really like to get this running asap for a community project
> I
> > >>> am hoping to run.
> > >>>
> > >>> Any help, suggestions, ideas welcomed :)
> > >>>
> > >>> Many thanks in advance,
> > >>>
> > >>> Tony :)
> > >>> --
> > >>> --
> > >>> (:techitone:)
> > >>> --
> > >>>
> > >>>
> > >>
> > >
> > >
> > > --
> > > --
> > > (:techitone:)
> > > --
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > --
> > --
> > (:techitone:)
> > --
>
>
--
--
(:techitone:)
--
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