Cirrus Logic Audio Card working on the Raspberry Pi 2

For those interested I've uploaded the following packages to my Raspbian repository (http://rpi.autostatic.com/):

• linux-image-cirrus: meta package that installs a kernel with Wolfson/Cirrus Logic audio interface support
• cirrus-config-overlay: package that installs the device tree overlay file for the Wolfson/Cirrus Logic audio interface
• cirrus-config-modprobe: package that installs the modprobe config file for the Wolfson/Cirrus Logic audio interface
• cirrus-config-scripts: package that installs the playback, record and reset scripts for use with the Wolfson/Cirrus Logic audio interface
• cirrus-config: meta package that installs all the above packages

If anyone is interested in testing these packages, go ahead, feedback is greatly appreciated. On a clean Raspbian install adding my repo, installing the cirrus-config package and rebooting your RPi should enable the Wolfson/Cirrus Logic audio interface. No need to edit any config files.

Jeremy

This worked perfectly. Thanks!

To recap my steps. Starting from fresh Raspbian wheezy on Rpi2 with Cirrus AC.

wget -q -O - rpi.autostatic.com/autostatic.gpg.key | sudo apt-key add -
sudo wget -q -O /etc/apt/sources.list.d/autostatic-audio-raspbian.list rpi.autostatic.com/autostatic-audio-raspbian.list
sudo apt-get update
sudo apt-get install cirrus-config
sudo reboot
Playback_to_Lineout.sh
aplay some-wav-file

This worked perfectly. Thanks!

To recap my steps. Starting from fresh Raspbian wheezy on Rpi2 with Cirrus AC.

wget -q -O - rpi.autostatic.com/autostatic.gpg.key | sudo apt-key add -
sudo wget -q -O /etc/apt/sources.list.d/autostatic-audio-raspbian.list rpi.autostatic.com/autostatic-audio-raspbian.list
sudo apt-get update
sudo apt-get install cirrus-config
sudo reboot
Playback_to_Lineout.sh
aplay some-wav-file

Troy,

I need to record audio in files .wav and save in the SD card to the raspberry  with cirrus audio logic card, someone help me please,  it is urgent!!!

Diego

This works for me, to capture and record audio from the Cirrus card:

#!/bin/bash

./Record_from_lineIn.sh

arecord -f S16_LE  -c 2 -d 300 -D hw:sndrpiwsp -r 192000 /tmp/s.wav

I want only 16-bit audio.  If you want full 24-bit, then replace S16_LE with S24_LE

-c 2 specifies two channels (stereo)

-d 300 specifies 300 seconds of audio captured

-D gives the device name ( arecord -L will list available devices)

-r 19200 specifies rate 19.2 kHz

/tmp/s.wav is the name of the file for the captured audio

You'll find other options from

man arecord

Good luck -- Ross

Thank you for this!

Interestingly, you have a typo in your actual line of code.  Instead of 19200 you have 192000.  As it turns out, 192000 is actually a valid sample rate.  441000 threw an error.  Of course I really wanted 44100.

OK, so I was able to record from both the onboard MEMS mics and from this: http://www.amazon.com/Lavalier-Omnidirectional-Condenser-Microphone-Smartphones/dp/B011EXBCMQ

That lapel mic is a TRRS (Tip, Ring, Ring, Sleeve) which is meant for smartphones.

I wasn't sure how it would behave with the Headphone jack (black) or the Line-In Jack (Pink) of the CLAC.

Below are the batch files I created.

For the MEMS mic record I used:

File: testDMIC.sh

#!/bin/bash

./Record_from_DMIC.sh

arecord -f S16_LE  -c 2 -d 5 -D hw:sndrpiwsp -r 44100 s_testDMIC.wav

pi@raspberrypi: ~$ sudo chmod +x testDMIC.sh

pi@raspberrypi: ~$ sudo bash testDMIC.sh

pi@raspberrypi: ~$ aplay s_testDMIC.wav

It worked very well.  Playback was crystal clear.

For the Lapel Mick I tried two ways.  First, recording from the Headset jack (black)

File: testMicHeadset.sh

#!/bin/bash

./Record_from_Headset.sh

arecord -f S16_LE  -c 2 -d 5 -D hw:sndrpiwsp -r 44100 s_testMicHeadset.wav

(plug in the Mic to the Heaset Jack)

pi@raspberrypi: ~$ sudo chmod +x testMicHeadset.sh

pi@raspberrypi: ~$ sudo bash testMicHeadset.sh

(unplug the mic from the headset jack, plug in the speakers/headphones to the headset jack)

pi@raspberrypi: ~$ aplay s_testMicHeadset.wav

Again, it worked very well.  Was a bit hotter than the MEMS mics, or maybe I should say the MEMS mics were a tad bit attenuated in comparison.  Playback was crystal clear.

The second way was to record using the Lapel Mic using the Line In (Pink)

#!/bin/bash

./Record_from_lineIn.sh

arecord -f S16_LE  -c 2 -d 5 -D hw:sndrpiwsp -r 44100 s_lineIn.wav

Got nothing out of the wav file.  Was completely silent.  This makes sense, since microphone levels are such low power and would require a pre-amp to go into a Line Level.  So I was intrigued by the script titled "Record_from_lineIn_Micbias.sh" which, according to the user manual, says:

"Record from line in socket at microphone sensitivity level, and with mic bias voltage switched ON "

So I tried:

#!/bin/bash

./Record_from_lineIn_Micbias.sh

arecord -f S16_LE  -c 2 -d 5 -D hw:sndrpiwsp -r 44100 s_LineInMIC.wav

Heard a soft pop at the beginning and then silence.  I don't know enough about the LineIn circuitry vs the Headphone circuitry to provide clarification as to what is happening.

Thanks a lot for your help,

now , i want to make a script with cirrus audio logic card , I mean  i want to start recording audio after 5 minutes when the raspberry system start.

i mean,

1) the raspberry start and boot the OS

2)after 5 minutes automatically start recording audio or execute this instruccion (arecord -f S16_LE  -c 2 -d 300 -D hw:sndrpiwsp -r 192000 /tmp/s.wav)

3)finish the process

please help me!!

Please help!!! , i dont have time

Diego

You need a shell script like this:

#!/bin/bash

# Enable the Cirrus for recording

/home/pi/Record_from_lineIn.sh

# Wait 5 minutes

sleep 5m

[ record command ]

[ whatever comes next ]

Save it as an executable script ( say /home/pi/delayrecord )

Add a line to /etc/rc.local to invoke it asynchronously on startup

. . .

/home/pi/delayrecord &

. . .

Cheers -- Ross