Cirrus Logic Audio Card working on the Raspberry Pi 2

Hi Ragnar!

First of all, thank you for your work about the new cirrus modules and kernel, with your help now i able to use
my B+ raspberry with the Cirrus Wolfson card on raspbian with Michael Gorven's Kodi build !!

XBMC for Raspberry Pi | Michael Gorven - cocooncrash

My current setup (for those who might had a problem with it) is:
Kodi 14.0~git20141203.35b4f38-1: Helix 14.0 RC 2

raspbian 3.18.7

Hexxeh rpi firmware commit 46c2653d49570e14a28afad9e56677081e7a2409

kernel_CL.img comment in config.txt

My only problem is with the framerate, i think there is a bug someware -i don't know is which part,im not

familiar with linux in that level.The detailed problem is: when i playing a flac file with kodi, and its coded in

24bit/48kHzor some other than normal 44.1kHz format, the sound is just like out of tune, just like slippage of a turntable. belt.

This probalby a framerate problem, but it wont get better when i change the framerate in Kodi to 48,192 or whatever.

So, which log can be helpful to you or someone to find out the problems root?

Thanks!
Viktor

Yes, probably a bug or that Cirrus haven't updated all their code to 3.18 yet. I have noticed that a couple of things that were present in their 3.10 and 3.12 kernels are missing in 3.18.

Your problem might be the same as this: http://www.element14.com/community/thread/42186/l/issues-with-samplerates-below-441khz

I have built a kernel with the patch provided by hiassoft and I'll upload it for you to try when I get home from work today.

--

Ragnar

Hi,

I missed this thread. Thank you, i will try it.

Thx!

Viktor

I have uploaded a pair of kernels with the FLL patch included, as deb packages.

For the RPi2 :

Download link: https://drive.google.com/uc?export=download&id=0BzIaxMH3N5O1S1JyTkJ4Z090cHc

File name is linux-image-3.18.9-v7cludlmmapfll_3.18.9-v7cludlmmapfll-4_armhf.deb

md5sum: b168d2d736974f1f681fdefa9e246909

Install with

sudo dpkg -i linux-image-3.18.9-v7cludlmmapfll_3.18.9-v7cludlmmapfll-4_armhf.deb

Change /boot/config.txt to contain
kernel=vmlinuz-3.18.9-v7cludlmmapfll

For all other models:

Download link: https://drive.google.com/uc?export=download&id=0BzIaxMH3N5O1OGNpYl8wRVhqbU0

File name is linux-image-3.18.9cludlmmapfll_3.18.9cludlmmapfll-3_armhf.deb

MD5sum: b7947af7cbeb34d2d0324c6896aedf67

Install with

sudo dpkg -i linux-image-3.18.9cludlmmapfll_3.18.9cludlmmapfll-3_armhf.deb

Change /boot/config.txt to contain

kernel=vmlinuz-3.18.9cludlmmapfll

Please report back if this fixes your issue or not.

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Ragnar

Hi Ragnar!

Thank you for uploading, last night i installed the patch and changed the kernel comment.
After that the system booted succesfully with a new kernel, and im playing with some 24bit-192khz flacs,
its seems ok, but it would be better if i have a test file. If you could generate some sine wave

files with different samplerates and bit depth i will try it with a freq. analiser at the end of the amp. chain.

Or do you have a better idea for easy testing?

If there is a terminal command or software to generate the sine waves, i will generate it on my own, with a little help.

Thanks a lot!

Viktor

I forget that, i test it with a timer, 20seconds of playing (kodi showing the elapsed play time) it seems really 20seconds
measured by the timer on my phone. It will be more precise if i measure the whole track play time, i know, but it was really
late..:)

Viktor

If there is a terminal command or software to generate the sine waves, i will generate it on my own, with a little help.

You can do this with sox (just do an "apt-get install sox" if you don't have it installed).

For example: stereo 16-bit WAV at 44.1kHz samplerate with a 10 second 440Hz tone at -3dB:

sox -n -c 2 -r 44100 -b 16 440-cd.wav synth 10 sin 440 gain -3

Change the -r and -b options for different samplerates / bits per sample.

so long,

Hias

Hi,

Ok, thanks, i will reply if i have any news.

Viktor

Hi!

Good news, it seems perfect:)
I was generated 3samples
44100 16
48000 24
96000 24

these are the regular formats for high quality coded flacs from the russians:)pl

Installed freq analizer on my phone and it tells 441Hz for the 440Hz sample, so i think
its okay, anyway i not recognized the wa-wa thing after i installed the patch.

If i have some time i will make some test with the old config just for sure.

Thanks!!

Viktor

Hi!

Good news, it seems perfect:)
I was generated 3samples
44100 16
48000 24
96000 24

these are the regular formats for high quality coded flacs from the russians:)pl

Installed freq analizer on my phone and it tells 441Hz for the 440Hz sample, so i think
its okay, anyway i not recognized the wa-wa thing after i installed the patch.

If i have some time i will make some test with the old config just for sure.

Thanks!!

Viktor