Ok, so my initial experiment is a good success. Have my old fashioned pi running volumio 1.5.
Setup is as follows;
1amp micro usb wall wart from RS -> raspberry Pi (Ethernet not WiFi) -> USB : musical fidelity V-link : spdif -> midiman flying cow DAC -> Little dot mkiii tube headphone amp -> denon AH-D2000 or AKG-701
Uses Ethernet cable, SD card reader in USB and smb nas for flacs and 320 mp3s. No USB HDD, yet.
The V-link is asyncrnous USB and runs up to 24bit 96khz. It runs smoothly since day 1 with no pops or dropouts.
The flying cow is now obscure and will ultimately be upgraded soon, but gives me no cause for concern yet. (From back in the day when the concept of a separate DAC was a bit fresh) possibly to a Schitt modi, or bifrost if I can sell my kidney.
So my question is, what do I upgrade. If anything. I know the pi’s USB power supply isn’t pretty, I will happily get a quality powered hub, if someone can recommend one that is clean and qualify then I’d appreciate it. As I understand I can feed the pi from that, hub feed s the pi data usb back out to the hub and plug in the v link and any other things.
Well this isolate any power noise the pi males via the hub? Or is there a diy way to cut the Pis outbound power feeding back to the hub? Only passing data tx.
Is it worth investing in a i2s output (I’d go for hifiberry spdif out, as a £30 dac would be a massive downgrade from the £125 flying cow). To avoid usb noise and the PiS power noise? Or am I not going to notice an improvement vs my usb v link?
I.e are there other audiophile indescribable improvements for the i2s hiberry digi? I’ve heard mixed results vs good USB vs i2s even if it makes good sense to skip unnescesary busses and talk direct with i2s it sounds like a sync USB might reduce jitter by having an external clock? (On shaky ground\ knowledge here)
Thanks volumio for a stonkingly good distro