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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
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Old 20th September 2019, 08:20 PM   #901
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
Is it possible to set this modified i2s driver to rpi3?
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Old 20th September 2019, 08:25 PM   #902
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
OK, I think nanopi is a bit another story. Another cpu and so on...
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Old 21st September 2019, 03:14 AM   #903
iancanada is offline iancanada  Canada
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
Quote:
Originally Posted by bisesik View Post
But I am able to play 384kHz PCM now in true sync via Roon. Problem is with DoP limitaion in Roon.
RPi supports native DSD only through USB streamer. If you want to eliminate the DSD128 limitation, you have to use a USB. Both Roon and Volumio are.

If you prefer GPIO of RPi, only DSD through DoP will be available.

Regards,
Ian
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Old 21st September 2019, 03:18 AM   #904
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
No Ian, I am absolutely happy with DSD64/128. I have no DSD256 files at all in my music collection.
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Old 21st September 2019, 05:50 AM   #905
pinnocchio is offline pinnocchio  Canada
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Hi Ian,

What DSD data rate were you using with your FiFoPi and DAC for you comparison tests? Which USB to i2s were you using? Full DSD conversion by Roon software or some other hardware that does PCM2DSD?

Thanks
Do
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Old 21st September 2019, 09:32 AM   #906
soundcheck is offline soundcheck  Germany
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BTW. Did anybody actually try OSF Bypass???

I mean. Usually the on-dac filters are known for not being highest end.
Perhaps the OSF-B feature is rather low hanging fruit.

Last edited by soundcheck; 21st September 2019 at 09:35 AM.
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Old 22nd September 2019, 08:37 AM   #907
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
Quote:
Originally Posted by soundcheck View Post
BTW. Did anybody actually try OSF Bypass???
I am still on true sync mode.
Just tried the OSF bypass. OLED indicates correctly both PCM and DSD stream.
There is no sound from PCM (silence at any volume including 0). DSD plays but with big amount of "white-like" noise at DSD64 and much less at DSD128. But both can be good enough sonically if to reduce the volume to ~-6dB at DSD64 and ~-2dB at DSD128 (volume regulation works).
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Old 22nd September 2019, 08:42 AM   #908
soundcheck is offline soundcheck  Germany
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In OSF-B you'd need to feed 8xFS according to DS. 44k1->352k8
Volume control and Mute wouldn't work anymore.
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Old 22nd September 2019, 09:09 AM   #909
bisesik is offline bisesik  Kazakhstan
Output transformers for DACs
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IanCanada's Latest RPi GB Goodies Impressions... and your tweaks, mods and hints...
And what is the better way to do it within Roon? There is no resampling pluging in DSP section of Roon. HQPlayer?..
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Old 22nd September 2019, 09:26 AM   #910
soundcheck is offline soundcheck  Germany
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Hmmh. I don't use Roon. HQplayer has a good rep.

However.

I'd say the vast majority is using sox/libsoxr on piCorePlayer, Moode, Volumio
- the stuff that most people areound here use. sox/libsoxr delivers absolute
top notch results.

BUT.

Highest quality resampling on the PI is not what I'd recommmend. I've done and shown the benchmarks.
The PI is simply to slow. (I havn't tried it and didn't run the benchmarking on PI4 and aarch64 (yet) )

As a test you could simply try offline resampling a test-file first. And that one you can play back.
This way you'd avoid any huge investments or configuration changes.
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