Why SACD Disc playback sounds better than its equivalent ripped DSF file / streaming

Well it seems cd are pretty good with quality sound you hear that ,audiophiles....

Try the same experiment but with a redbook CD. 
The outcome will most likely be the same. 
The reson, most likely, is the computer feeding the signal into the Oppo via USB is too noisy and the Oppo is not able to cope with amounts of jitter in the data stream. 
The quality of the USB cable matter as well. 
 

I compared CDs played on a marantz sa-10 to the exact same albums ripped as FLAC fed into the sa-10 via USB from the Aurender N200. It sounded identical. 

https://hydrogenaud.io/index.php/topic,124798.0.html

It appears that our observation SACD Disc playback sounds better than its equivalent DSF file playback has been observed by others as well.

The worst place to store the music file to play is a external hard disk connected (and power supplied) via USB: it is very noisy (several times tested by myself and many, many times read in forums)

The other point to consider is that USB connections are more difficult to manage by the manufacturers than the "internal" connections, that I guess in your Oppo is a I2S.

I do not know if possible, but using an external computer to "play" the file with a good app (Roon, Audirvana, ....) and feed the Oppo as an external DAC, would make a better comparison.

@asin what if you use the Oppo 105 rear USB input? It sounds clearer than the front one.

Thanks,

aldnorab 

Ripped DSF file (from identical SACD Disc) is stored in 1TB SATA SSD.

We use SATA -USB Cable converted to insert the USB to Oppo 105 front USB input.

Where is the ripped DSF stored ?  Did you try another device capable of playing DSD files?  I love playing SACDs on my 105, but the few DSD downloads that I own didn’t sound as good on the Oppo as they did another high end streamer that I no longer own but could play DSD files.  I have never been as impressed by the usb on the Oppo, thinking it is a notch below the other outputs 

Noise from the computer used to store those rips/files.