mfsoa Posted May 30, 2020 Share Posted May 30, 2020 Hi Everyone, I have been playing with a Rotel Michi preamp. Sounds good, built like a tank. When I use Roon to upsample to DSD, Roon has different HF cutoff filters: Conservative: 24KHz LPF Recommended: 30KHz LPF Permissive: 50KHz LPF Unfiltered: Use with caution The differences between them are clearly audible. I don't believe these 56 year old amateur drummer's ears are hearing actual changes above 30-50KHz. What am I hearing? Why the difference? Any ideas? Does DSD have aliasing that is in the audible range etc? Thanks, Mike Link to comment
1 PeterSt Posted July 5, 2020 Share Posted July 5, 2020 ANY filter will bear anomalies. Actually the art of digital filtering is that they don't jump forward with a flavor (which is the anomaly). On 5/30/2020 at 3:09 AM, mfsoa said: Unfiltered: Use with caution Especially "unfiltered" will exhibit anomalies. You and your 56 y/o ears should seek for the most conservative filter possible. Like the one I am using myself currently : 16KHz. On 5/30/2020 at 3:09 AM, mfsoa said: I don't believe these 56 year old amateur drummer's ears are hearing actual changes above 30-50KHz. So exactly that. And the more "conservative" the less anomaly. Mind you, in theory when all has been done right (Roon does not provide any of that). I know you can't work with the answer for real, but still it is the answer. OK, it is my answer. Peter Lush^3-e Lush^2 Blaxius^2.5 Ethernet^3 HDMI^2 XLR^2 XXHighEnd (developer) Phasure NOS1 24/768 Async USB DAC (manufacturer) Phasure Mach III Audio PC with Linear PSU (manufacturer) Orelino & Orelo MKII Speakers (designer/supplier) Link to comment
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mfsoa
Hi Everyone,
I have been playing with a Rotel Michi preamp. Sounds good, built like a tank.
When I use Roon to upsample to DSD, Roon has different HF cutoff filters:
Conservative: 24KHz LPF
Recommended: 30KHz LPF
Permissive: 50KHz LPF
Unfiltered: Use with caution
The differences between them are clearly audible. I don't believe these 56 year old amateur drummer's ears are hearing actual changes above 30-50KHz.
What am I hearing? Why the difference? Any ideas? Does DSD have aliasing that is in the audible range etc?
Thanks,
Mike
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