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Old 15th February 2011, 05:46 AM   #1831
phofman is offline phofman  Czech Republic
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Quote:
Originally Posted by rossco_50 View Post
ecdesigns did this Building the ultimate NOS DAC using TDA1541A

He tried alot of different approaches with those adaptive TI chips. Probably more than was worthwhile. Nothing to do with linux though.
Thanks for the link, it looks interesting.
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Old 15th February 2011, 05:57 AM   #1832
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Quote:
Originally Posted by rossco_50 View Post
ecdesigns did this Building the ultimate NOS DAC using TDA1541A

He tried alot of different approaches with those adaptive TI chips. Probably more than was worthwhile. Nothing to do with linux though.

I've been running Johns USB receiver and reclocker for quite some time. ( He was feeding the receiver with bus-power btw!!)

All I say is at some point real life conditions and theoretical respectively mostly questionable measurement results need to be compared.

There is a reason why John developed his SD card player.

Cheers
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Old 15th February 2011, 12:14 PM   #1833
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Souncheck, ok you use the ec designs reclocker, but have you used it with the pci usb card which had particular power supplies and clock configurations?

You seemed to be dismissing 1audio's shared experience on the grounds that this was old news and marketing, but I don't think anyone in this thread has suggested addressing the computers usb interface, let alone the specific implementation on an alix board.

I, for one, am glad when knowledgable manufacturers share their ideas, especially in this case, it is not at all overbearing. Hopefully he will still post when there is something to share that may be of interest to others.
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Old 3rd March 2011, 08:14 PM   #1834
Jogi is offline Jogi  Germany
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Maybe someone can help...
I am running Linux Mint into a dac, and everything works fine, except one thing: I only can play music through Rhythmbox. No VLC, Amarok or whatever. When I use headphones or the laptop speakers, these work.
So I searched via google for a solution, but I just didn't get it working.
Somehow Rhythmbox has exclusive rights, and I cannot fix it. But I am sure it is simple...

That aside it is a real loss that all the Linux tweaks from Klaus disappeared from the entire net.
I managed to set up two or three of them and every time it was a nice stepup in sound quality.

Cheers,

Juergen
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Old 3rd March 2011, 09:27 PM   #1835
frenzic is offline frenzic  Netherlands
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Internet Archive: Wayback Machine The Wayback Machine could be helpful to you.
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Old 4th March 2011, 06:52 AM   #1836
phofman is offline phofman  Czech Republic
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Quote:
Originally Posted by frenzic View Post
Internet Archive: Wayback Machine The Wayback Machine could be helpful to you.
I am afraid the wayback machine quit indexing web in 2009, I could not find any data for 2010.
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Old 4th March 2011, 06:55 AM   #1837
phofman is offline phofman  Czech Republic
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Quote:
Originally Posted by Jogi View Post
I am running Linux Mint into a dac, and everything works fine, except one thing: I only can play music through Rhythmbox. No VLC, Amarok or whatever. When I use headphones or the laptop speakers, these work.
If I understand correctly, you have two sound cards. The internal one in your laptop is configured OK. Whereas only Rhythmbox can play into your USB soundcard (your DAC).

First question - does your Mint use pulseaudio, or is it running KDE without it?
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Old 4th March 2011, 11:20 AM   #1838
Jogi is offline Jogi  Germany
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I deleted pulseaudio, so there should be no problem from this side. And yes, the internal soundcard works with all players, the external dac only with Rhythmbox.
I tried to install/reinstall alsa and the players, with no effect. I think it is a simple reason, that RB has the exlusive rights to use that dac. But simple or not, I don't get it....
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Old 4th March 2011, 03:33 PM   #1839
phofman is offline phofman  Czech Republic
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Quote:
Originally Posted by Jogi View Post
I deleted pulseaudio, so there should be no problem from this side. And yes, the internal soundcard works with all players
The reason your internal soundcard works with all players at the same time is that in alsa the "default" device is configured through the dmix plugin, see Dmix - ALSA wiki . You can check output of aplay -v (verbose mode, see the dmix kicking in):

Code:
aplay -v -D default some-your.wav
Quote:
the external dac only with Rhythmbox.
...RB has the exlusive rights to use that dac.
Exactly, if Rhythmbox occupies a sound card without the dmix plugin, it has exclusive access and no other process can use the device.

You can check which process is holding your device by

Code:
sudo lsof /dev/snd/*
Device numbers are found by

Code:
aplay -l
If you want best quality, I am afraid you cannot use mixing (dmix, pulseaudio, etc.) since it involves resampling. Just choose your favourite player and configure it to play on your USB DAC via the plug plugin. It means setting the alsa device name to plug:CARDNAME , where CARDNAME is the first string listed for the USB soundcard in aplay -l. E.g. the CARDNAME for usb dac listed in aplay -l on page Mandriva Forum (en) • View topic - Howto use USB sound, not mobo chip? would be Audio.
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Old 4th March 2011, 09:03 PM   #1840
Jogi is offline Jogi  Germany
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Thanks for this detailed information...
It is no problem to use just one player, but it should also play video files, which rhythmbox doesn't.
As I am no Linux expert, I would need a command line to set it up for e.g. VLC .
I tried figure it out it for 1hr now, and I don't get it. Linux is nice, sounds good, but is p.i.t.a for "average" people like me.
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