Amazon Music Difference in HD/UHD WiiM app switch setting, with Amazon Prime music

merifon

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Oct 25, 2022
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Sometimes I use Amazon prime music and I noted that if the HD/UHD WiiM app prefs switch is set to off, streaming goes 256Kbit 24bit 44.1KHz, whilst if set to on, streaming changes to 320Kbit 16bit 48KHz.
Anyone knows where downsample came from in both cases? Is from Amazon direct or locally done by WiiM app?
Just a curiosity never did obsessive tests...
Just to compare, on Bluos the same streaming source shows 323Kbit Opus...
I forgot to say that I know the purpose of such switch with full AM subscription.
 
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