I have a different take on this, in two ways. I don’t think you need to spend much on a digital source. And I think the differences you'll hear between a (clean) digital source and e.g. your RP6 will be due to what the TT is adding to the signal, and not to any deficiency of the digital source.
Deep breath.
I’ve heard some high-end digital sources through my system, e.g. CDPs from Audio Research and Copland. But so far I haven’t heard any significant difference between them and the very cheap source I use. (I’m using a Synology NAS via USB. Including 4TB of hard disks, the Synology cost me a bit over £300.) Having said that, the Synology is piping into a Devialet, which combines a very good DAC with a supremely transparent and dynamic amp. Because the digital signal via USB is asynchronous, and because the Devialet’s DAC is so good, digital jitter is non-existent.
I have another digital source: a heavily modded Sonos Connect piped into the Devialet via SPDIF. The Synology via USB sounds better to me than the Sonos.
But the key thing is: I get none of the digital harshness or coldness or artificiality that people talk about.
Second point. Modern music is recorded in an aseptic environment. Nasty echoes and reverb are eliminated in the studio, as these would muddy the sonic image that the studio engineers are working with. If you want to edit sound, best exclude all the nasties at the outset. Then what normally happens is that reverb is added digitally in order to make the sound warmer and more natural. (It’s ironic that most contemporary recordings, even what you hear on a vinyl disk, are the product of digital processes.)
Here’s a hypothesis for you. Analogue reply on a TT adds yet more reverb. No matter how well isolated a TT is, there'll inevitably be lots of reverb picked up by the cartridge from ambient vibrations, not least from the sound coming out of your speakers as the LP is playing. And we like reverb: it sounds warmer, more natural etc. (This is why recording engineers add it.) In other words, the so-called “analogue sound” is felt to be superior to "digital sound" because it has extra reverb added during playback, and we like reverb. But it’s not what’s in the original signal. Indeed, arguably the higher you go up the TT chain and the better the TT’s isolation is (think SME!), the less reverb will get through to the cartridge and the more the TT will sound like a digital source.
In conclusion, it’s possible to get a clean digital signal with little outlay, and if your DAC and amp are good (and that's where I'd spend my money, and on speakers too, of course), the result will be more transparent than from a TT. Whether you like it or not is a different matter though …
Anyway, that's how I see things now. But I still have a fair bit to learn.
:santa:
Matt