mherger wrote:
> > Querying LMS' API will give you the stream's sample rate as received
> by
> > LMS, which isn't necessarily the same as the one received by
> squeezelite
> > (unless you make sure LMS never transcodes).
>
> I believe bidule needs to give us some more context about what he's
> trying to do. It sounds as if he needed the sample rate or whatever to
> _initialize_ the streaming. In which case getting it from the status
> query would likely be too late.
>
> --
>
> Michael
Hello Michael, thank you for helping.
In the mean time I figured that I had to install the JQ command-line
JSON processor to make your script working
Code:
--------------------
apt-get install -y jq
--------------------
Then with :
Code:
--------------------
curl -X POST -sd
'{"id":0,"params":["10.144.1.2",["status",0,1,"tags:T"]],"method":"slim.request"}'
http://10.144.1.1:9000/jsonrpc.js | jq '.result.playlist_loop[0].samplerate'
--------------------
The system returned :
"48000"
Perfect !
To answer your specific question:
I'm trying to use the Samplerate information in order to switch a DAC
hardware clock on the fly.
For the time being the way I want to test it is this way:
Getting the sample rate each time a new track is starting and from that
select the right hardware clock with a GPIO flag.
However, you are right that it will probably be too late that way.
A solution may be to add a small RAM FiFO buffer before playing on the
hardware.
Something like asking Squeezelite to send the stream to a RAM FiFO and
use the same GPIO flag as before to read the FIFO with sox.
Someone may have another simpler idea.
Any way I go step by step
Step 1 is done
Step 2 is to use "Event Trigger" to execute the above JSON commands
triggered by LMS on each new track
No success yet
Step 3 test Samplerate and change GPIO
Step 4 use the GPIO for the hardware clock selection
Question would it be possible to integrate the samplerate test inside
the Event Trigger config file ?
Jean
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