I know I am not the first one, but I thought I should report on my
experience with the $42 UAE23 DAC from here:
http://hifimediy.com/index.php?route=product/product&product_id=83
First of all it came up working without a hitch as long as I configured
it via the Web Interface (it is not possible to do so via the Jivelite
interface for some reason, it appears in the menu but can't be
selected).
I found it could also work without a USB hub at 44.1 and 96kHz sample
rates. (88.2kHz is not supported by this DAC.)
When playing 88.2kHz files Squeezelite does its trick of using plughw:
so the music does play, but it is resampled with a not very high quality
resampling algorithm. To get better quality resampling, I put the
following in my /etc/asound.conf
Code:
--------------------
defaults.pcm.!rate_converter "samplerate_medium"
--------------------
But with this more CPU intensive resampler, I found that I needed to
disable cpupower from using ondemand, because whenever it would try
396MHz, it would stutter badly. I have to leave cpupower in performance
mode to get fully reliable real-time resampling at "samplerate_medium"
which I need for my 88.2kHz albums.
This got me to thinking whether we could possible use the hardware ASRC
block inside the Freescale i.MX 6 SoC. This would be much more
efficient, but would require custom driver code?
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View this thread: http://forums.slimdevices.com/showthread.php?t=98544
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