Wiim Ultra shows 24/44.1 on optical input

[boteto]

Hello,

I'm using an old Yamaha CD player as a transport connected to my Wiim Ultra via Optical in / Toslink.
The strange thing is that Wiim shows 24 bit / 44.1 as input signal, is it upscaling? I believe the CD player should output 16/44.1 via optical.
What your ultra's show on optical in when you feed them 16/44.1 signal?





Regards,
Georgi

 

[Burnside]

I wouldn’t say showing an increased bit depth is upscaling nor anything to worry about. Submit a ticket to WiiM and hopefully they’ll either explain or change it.

 

[Valentino]

FWIW my Yamaha CD-S300 also outputs 24/44.1 on optical and It's DAC is a Burr Brown that can do 24/192. It's most probably always running at 24 bits anyway since these Yamahas also can play files from USB input. Of course today TOSLINK can do 24/192 and maybe more. It was was originally limited to 20/48, but that's forty years ago.
Just for fun, a CD signal peak at -6 dB, presented as a 16 and 24 bit word:
16 bit: 0111111111111111
24 bit: 011111111111111100000000