Wolfson Audio Capture With DarkIce, How?

Hi Leigh!

Look for channel = 1 in the configuration file. The Wolfson card won't allow anything other than 2 channels.

This is my darkice.cfg, which works splendidly, streaming mp3: (server name and password have been changed to protect the guilty...)

[general]
duration = 0 # duration of encoding, in seconds. 0 means forever
bufferSecs = 5 # size of internal slip buffer, in seconds
reconnect = yes # reconnect to the server(s) if disconnected

# this section describes the audio input that will be streamed
[input]
device = hw:0,0 # ALSA device
sampleRate = 44100 # sample rate in Hz. try 11025, 22050 or 44100
bitsPerSample = 16 # bits per sample. try 16
channel = 2 # channels. 1 = mono, 2 = stereo

# this section describes a streaming connection to an IceCast2 server
[icecast2-0]
format = mp3 # format of the stream: MP3
bitrateMode = cbr # constant bit rate
bitrate = 256 # bitrate of the stream sent to the server
quality = 0.8
server = www.example.local # host name of the server
port = 8000 # port of the IceCast2 server, usually 8000
password = xxxxxx # source password to the IceCast2 server
mountPoint = liveob # mount point of this stream on the IceCast2 server
sampleRate = 44100
channel = 2 # Stereo
name = OB case # name of the stream
description = Live from the field # description of the stream
url = http://www.example.com/liveob # URL related to the stream
genre = Speech # genre of the stream
public = no # advertise this stream?
#localDumpFile = dump.ogg # local dump file

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Ragnar

Thanks for that - spot on! that was easy and I've been streaming now for the last hour without a glitch so looks as it its done the trick!

Darkice seems to be consuming approx 50% cpu at the moment as a point of reference - thats streaming a 96k/44100/stereo/abr track the whole time.

Thanks very much

Ragnar,

I am having trouble setting the soundcard up with Darkice as well.

This is the error that I recieve.

Using config file: /etc/darkice.cfg

Using ALSA DSP input device: hw:0,0

Using POSIX real-time scheduling, priority 98

DarkIce: AlsaDspSource.cpp:195: can't set hardware parameters [0]

That one is not as clear-cut...

I think the card isn't initialized properly.

Have you run one of the Record_from... scripts first?

Can you post your darkice.cfg? (change passwords first)

Also try running

  darkice -v9

to produce more verbose messages and post those.

--

Ragnar

Ragnar,

Thanks for replying,

Yes, I ran script record from line in.

Also,

pi@raspberrypi ~ $ sudo darkice -v9

DarkIce 1.0 live audio streamer, http://code.google.com/p/darkice/

Copyright (c) 2000-2007, Tyrell Hungary, http://tyrell.hu/

Copyright (c) 2008-2010, Akos Maroy and Rafael Diniz

This is free software, and you are welcome to redistribute it

under the terms of The GNU General Public License version 3 or

any later version.

Using config file: /etc/darkice.cfg

30-Mar-2014 18:19:32 Using ALSA DSP input device: hw:0,0

30-Mar-2014 18:19:32 encoding

30-Mar-2014 18:19:32 scheduler high priority 99

30-Mar-2014 18:19:32 Using POSIX real-time scheduling, priority 98

DarkIce: AlsaDspSource.cpp:195: can't set hardware parameters [0]

Im not sure how to post Darkice .cfg, but here goes:

# sample DarkIce configuration file, edit for your needs before using

# see the darkice.cfg man page for details

# this section describes general aspects of the live streaming session

[general]

duration        = 0         # duration of encoding, in seconds. 0 means forever

bufferSecs      = 5         # size of internal slip buffer, in seconds

reconnect       = yes       # reconnect to the server(s) if disconnected

# this section describes the audio input that will be streamed

[input]

device          = hw:0,0    # ALSA device

sampleRate      = 22050     # sample rate in Hz. try 11025, 22050 or 44100

bitsPerSample   = 16        # bits per sample. try 16

channel         = 2         # channels. 1 = mono, 2 = stereo

# this section describes a streaming connection to an IceCast2 server

# there may be up to 8 of these sections, named [icecast2-0] ... [icecast2-7]

# these can be mixed with [icecast-x] and [shoutcast-x] sections

[icecast2-0]

bitrateMode     = abr       # average bit rate

format          = mp3       # format of the stream: MP3

bitrate         = 96        # bitrate of the stream sent to the server

server          = @localhost

                            # host name of the server

port            = 8000      # port of the IceCast2 server, usually 8000

password        = test    # source password to the IceCast2 server

mountPoint      = sample96  # mount point of this stream on the IceCast2 server

name            = DarkIce trial

                            # name of the stream

description     = This is only a trial

                            # description of the stream

url             = @localhost

                            # URL related to the stream

genre           = my own    # genre of the stream

public          = yes       # advertise this stream?

localDumpFile    = dump.ogg  # local dump file

# this section describes a streaming connection to an IceCast server

# there may be up to 8 of these sections, named [icecast-0] ... [icecast-7]

# these can be mixed with [icecast2-x] and [shoutcast-x] sections

[icecast-0]

bitrateMode     = cbr       # constant bit rate

bitrate         = 96        # bitrate of the mp3 stream sent to the server

format          = mp3       # format of the stream: mp3

quality         = 0.8       # encoding quality

server          = @localhost

                            # host name of the server

port            = 8000      # port of the IceCast server, usually 8000

password        = test    # source password to the IceCast server

mountPoint      = sample96  # mount point of this stream on the IceCast server

name            = DarkIce trial

                            # name of the stream

description     = This is only a trial

                            # description of the stream

url             = @localhost

                            # URL related to the stream

genre           = my own    # genre of the stream

public          = yes       # advertise this stream?

# this section describes a streaming connection to a ShoutCast server

# there may be up to 8 of these sections, named [shoutcast-0] ... [shoutcast-7]

# these can be mixed with [icecast-x] and [icecast2-x] sections

[shoutcast-0]

bitrateMode     = vbr       # variable bit rate mode

quality         = 0.5       # encoding quality

server          = @localhost

                            # host name of the server

port            = 8001      # source port of the ShoutCast server, usually 8001

password        = test    # source password to the ShoutCast server

name            = DarkIce trial

                            # name of the stream

url             = @localhost

                            # URL related to the stream

genre           = my own    # genre of the stream

public          = yes       # advertise this stream?

irc             = irc.yourserver.com

                            # IRC info related to the stream

aim             = aim here  # AIM info related to the stream

icq             = I see you too

                            # ICQ info related to the stream

It's the sampling rate in the [input] section - 22050.

There is a bug in the drivers, no support for rates below 32000 Re: PJSIP/PJSUA with Wolfson audio card

Usable sample rates are 32000, 44100, 48000, 88200, 96000, 176400 and 192000.

You have a lot of @localhost in there. That won't work, lose the @

Beware of the localDumpFile = dump.ogg

That will save everything you stream to a file and will fill your card pronto.

If you look at my config a couple of posts above you'll notice I've commented it out with a hash mark.

And are you really trying to stream to an Icecast2 server [icecast2-0], an Icecast1 server [icecast-0] and a Shoutcast server [shoutcast-0] at the same time?

I'm streaming to an Icecast2 server, so I've just removed the  [icecast-0] and  [shoutcast-0] sections entirely

--

Ragnar.

Ragnar,

Thank you very much, works fine now.

I just have to raise the volume some and I will be good to go.

Thanks again!!

Hello all

We have been using Pi's for streaming as part of a project to develop a live open microphone network from wild places.

We have had pretty good results using USB soundcards, with some limitations.

Now we are trying the Wolfson audio card.

We have successfully installed the card following very useful instructions here - thank you.

Now we have issues which we have also run into previously and always ended up working around rather than fully understanding or dealing with:

Using the darkice.cfg configuration used successfully by Ragnar above, we get bursts of apparently good quality audio for about 4 second periods, followed by pops and dropouts. The log reports repeated Buffer overruns, which we assume are associated with the dropouts.

We have found various inconclusive threads on this issue, but none that give us a solution or a clear understanding of the problem.

We'd be grateful for your advice.

Thanks

Grant

following this up:

we have now duplicated Ragnar's settings in the darkice.cfg and done a clean install based on Ragnar's disk image - thank you!

we have also set up a new icecast server and tried streaming to that locally

however, we have the same issues: audio dropouts and darkice reports: Buffer overrun!

Does anybody know what Buffer overrun! is telling us, or how we can address it?

Thank you

Best wishes

Grant

Buffer overrun is when sound samples are coming in faster than Darkice can get them out.

Something is slowing Darkice down. Do you have any other CPU-hungry processes running?

--

Ragnar