Whether to Upsample? Yes or No?

My findings here across a bunch of dacs that I have access to:

Yggrasil A1 - no point oversampling, red book audio sounds the best on this. Source matters pretty significantly since the USB port on this is not good. AES > coax > the other inputs. Similar results with gungnir a2.

That said the biggest sound difference for yggy and Gumby comes from leaving them on. About a week for the yggy and 48 hours for Gumby.

Holo May - loves high sample rates both over pcm and dsd. Worth using hq player - not source sensitive and the streamer doesn’t really matter too much assuming it’s not a noisy PC.

T+A Dac 200 - need upsampling to dsd. PCM isn’t as good though personal tastes vary

A note on Hqplayer - for dsd upsampling the most important option is the modulator that you select not the bitrate. So upsampling to dsd 512 using a poor modulator can make the sound worse IMO. The high end modulators require serious grunt to run
 
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