07-Feb-2021, 17:17
(07-Feb-2021, 16:32)streamy Wrote: As follow-up I generated the files as a set of 24/48k flacs and played them. Surely, taking into account that the 25kHz sine signal was almost canceled out due to Nyquist violation. Surprisingly, or not, all signals played through and either I heard the 1kHz signal or the noise on the tweeters confirming that the drivers were not muted. This same as the tests before all tracks were played via the RPi hat through optical in.
In continuation I played now all 15 tracks through the Devialet Spark software. To my surprise the 25kHz sine signal was not muted for all three tracks (48k, 96k and 192k). Here only a capable microphone like the UMIK-2 will show if the Phantom really play hires. So there is still hope.
The same when playing the tracks through UPnP. All files were played, no muting!
Let’s wait and see what @struts can record once he receives the UMIK-2.
More good stuff here [mention]streamy [/mention], thanks!
Just to be clear, when you say you then played the tracks “through Spark” can you describe the signal path? Were the tracks you played through the RPi not also controlled via Spark?
Hoping that proper measurements will show that an end-to-end 24/192 signal path has been supported at some point at least!
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