[Voyage-linux] noise when using new mubox firmware in cubieboard 2

[Kim-man 'Punky' TSE]

Hi Joseph,

I use the following but no noise so far:
1. I stored muisc in Voyage-based DIY NAS, NFS mounted, use rsize=8192 in /etc/fstab only.
2. my music are mostly FLAC 192/24, with some FLAC & WAV 44.1/16
3. DAC interface is XMOS USB 2.0 reference board.

The kernel 3.4.67 is newer and I only see the default CPU frequency governor had changed.  Try set the board to run as 
full speed:

echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor

Not sure if it could make a different.

Regards,
Punky


On 11/18/2013 3:03 PM, Joseph Chu wrote:
> Hello Punky,
> the file is flac format (16bit/ 44.1kHz), which is from a NAS.
> i already disabled the onboard sound i.e. output 1.
> i also have rsize=8192,wsize=4096 in mount option.
> actully i after i listen more carefully, the problem should be sometime L or R channel has a very short drop of sound.
> i first checked my DAC to amplifier connection but they are good.
> i also checked the system load but they are not heavy, less then 5%
> by the way, i didn't power off the cubieboard (always on) while i power off my DAC and Amp after i listen the music.
> Joseph
>
>


-- 
Regards,
Kim-man "Punky" Tse

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