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Old 1st December 2012, 01:02 PM   #1001
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Hi,
Last night I also was able to play Amanero-BufaloIII-Legato3.1 with Vortexbox.
Is simple, you just need updated Vortexbox 2.0 and need to use Mpod or Mpad clients that bypass Logithech Media Server and just use MPD server.

I still believe sound is much better thatn Coax Toslink.

In this setup I experienced more unlocks in the buffalo, and somethimes when changing sample rate, Bufalo doesnt get it and plays noise. It gets solved stopping the song and playing it again. Then Buffalo seems to get the sample rate and format. I am not totally sure but maybe I also could hear some low hissing (not totally sure since the PC power supply has noise too).

Next step is to upgrade firmware, as recommended by Amanero.

Cheers,
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Old 1st December 2012, 01:43 PM   #1002
29740 is offline 29740  Spain
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As another user of external power supplies for the Amanero I also must recommend it as an avenue others owe it to themselves to investigate.

There are several different approaches and many types of PSUs that can be used. It's a tad fiddly but "no-pain, no-gain"

I also confirm Jackals findings on upsampling, although I'm using older firmware and drivers (D1.0.5.3....F 1.05) with no noise problems at all.

I never worried about the L/R problem as a simple stop and restart of the changed sampling rate music rectifies the problem

When the dust has settled on the drivers and firmware I'll catch up.
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Old 1st December 2012, 01:50 PM   #1003
qusp is offline qusp  Australia
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Quote:
Originally Posted by supra View Post
Whatever. qusp you can be tiresome.
haha was that supposed to cut? amanero has NIL isolation, so having some is obviously more than none.

probably why the ap note has an isolated option...

but whatever, you can have you land of make believe
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Old 1st December 2012, 02:48 PM   #1004
shoom is offline shoom  Europe
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''As another user of external power supplies for the Amanero I also must recommend it as an avenue others owe it to themselves to investigate.

There are several different approaches and many types of PSUs that can be used. It's a tad fiddly but "no-pain, no-gain" ''

+1
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Old 1st December 2012, 04:49 PM   #1005
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Trere are two important things to do
- Ground isolation, thru iso/adum. May do some good things, maybe bad too, as they produse some bad common-mode noise.
- Good oscillator supply or off-board oscillators

These are the basics. A ton of ferrite on the usb and i2s are welcome too.
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Last edited by s3tup; 1st December 2012 at 04:56 PM.
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Old 2nd December 2012, 03:34 AM   #1006
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I did a test on a WM8741 DIY DAC. The gain of native DSD is so low comparing to PCM decoding. Why?
The L/R channel is not correct and seems to be inverse, the firmware just updated to latest version 1.056.

CFG: J.River 18, KS, DoP Bitstreaming, Volume disabled.

Please help me, thanks!
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Old 2nd December 2012, 03:53 AM   #1007
supra is offline supra  Australia
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Quote:
Originally Posted by shoom View Post
''As another user of external power supplies for the Amanero I also must recommend it as an avenue others owe it to themselves to investigate.

There are several different approaches and many types of PSUs that can be used. It's a tad fiddly but "no-pain, no-gain" ''

+1
Your right- even a simple powered usb hub (with a decent reg) gave a good improvement. Thanks for your constructive comments.
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Old 2nd December 2012, 05:10 AM   #1008
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When i2s input to ES9108 DAC, there is a "ping peng..." fulminatory sound at beginning of music. I checked 8741 DAC, there is no that noise.
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Old 2nd December 2012, 07:40 PM   #1009
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+3 for me

Added onto the spreadsheet

spavleski
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Old 4th December 2012, 06:22 PM   #1010
ultrafi is offline ultrafi  United States
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Just the other day, I used the Amanero board to feed I2S to my favorite TDA1543N2 based DAC - nice, real nice. Even ran some files at 176.4k.

Been thinking of doing a PCM5102A based DAC board, essentially the same footprint as the Amanero board, and was wondering if there would be any interest in such a board?
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