Wolfson Audio Capture With DarkIce, How?

Question

Hi all, so I received my Wolfson a few weeks ago and finally got round to working with it I'm trying to put together an Icecast Source Client via the pi, previously without the wolfson it would glitch and generally cause a substandard broadcast, so I'm hoping with the wolfson I can make a nice cost effective broadcast box. However, I downloaded the wheezy image ( Re: Wolfson modified Noobs raspbian zipped img Cannot unzip new download ) with the precompiled drivers in and duely set off compiling Darkice with MP3 support ( Live mp3 streaming from audio-in with DarkIce and Icecast2 on Raspberry Pi ) My problem however is I've tried selecting the correct device but I just dont know which one it is. I've executed the Record_from_lineIn.sh script to start with and then tried arecorder -l which returns: 
 **** List of CAPTURE Hardware Devices **** 
 card 0: sndrpiwsp [snd_rpi_wsp], device 0: WM5102 AiFi wm5102-aif1-0 [] 
 Subdevices: 1/1 
 Subdevice #0: subdevice #0 
 so I've tried entering hw:0,0 into the darkice.cfg device line and I get the following: 
 Using config file: /etc/darkice.cfg 
 Using ALSA DSP input device: hw:0,0 
 Could not set POSIX real-time scheduling, this may cause recording skips. 
 Try to run darkice as the super-user. 
 DarkIce: AlsaDspSource.cpp:173: can't set channels [1] 
 (also tried it sudo'd but no change) I've also tried device = default but get the same error, also tried options such as snd_rpi_wsp, sndrpiwsp but cant get it to capture effectively. Any ideas what the capture device should be set as for the line in at all (as a start )

Former Member · Accepted Answer

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 -- Ragnar