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WOLFSON CARD


REVEIL PI FOR WOLFSON - NOTES ON SETUP

Download a disk image that includes the Wolfson drivers (DEC 2014 - 4.7 GB)

The notes on setup etc for the reveil-pi SD Card are also relevant to the SD Card designed for use with Wolfson's dedicated Raspberry Pi audiocard.

This is likely to be useful if you plan to use your existing audio equipment (microphones and soundcard) to capture audio, which you then want to feed into the Pi for live streaming.

The Wolfson audiocard only works with the Pi B (and probably A), and not with later A+ or B+ models. For Pi B+ and A+ see the Cirrus Logic audiocard

Thanks to Akos Maroy, Rafael Diniz and other contributors to the free open source Darkice project for live streaming audio.

The Wolfson requires specific drivers, which are not readily integrated with the Pi's operating system and the Darkice streaming software. We are grateful to the Wolfson Pi group at Element 14, and especially to Ragnar Jensen for his detailed help and advice on implementing Darkice with the Wolfson card.

The current disk image 'reveil-pi-wolfson' includes Darkice 1.2, the latest version of the Wolfson drivers and Raspbian Operating System available in NOV 2014, and various scripts to improve long term streaming.

Connect the Wolfson audio card to the Pi B following instructions with the card or the Wolfson Soundcard Manual.

Follow previous instructions for inputting your WiFi settings (if using); alternatively, remove any WiFI USB adaptor and connect an ethernet cable from the Pi to your router.

The reveil-pi-wolfson is set to stream audio from the soundcard's Line In by default. It sets up a stereo stream to the Locus Sonus server called reveil_test_wolfson. See Streaming Settings for info on adjusting settings and matching to the Locus Sonus server and map.

The default setup is likely to be useful if you already have audio equipment (microphones and soundcard) to capture audio, which you want to feed into the Pi for live streaming.

The Wolfson soundcard includes other ways to capture audio, including a (mono) Microphone Input and 2 onboard digital microphones. The REVEIL Wolfson Pi SD Card includes a simple graphical interface to select between them, accessed from the command line. To launch it, log into the Pi and type (or copy and paste)

sh /home/pi/Desktop/stream_settings/audio_configuration.sh

From the interface, choose the audio input and adjust the gain.

For advice contact grant@soundtent.org







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