Teralink X2

[anbello]

Originally Posted by diytoon

I have a teralink X2 on my ubuntu netbook...works out of the box, but cannot get it to output 24b 96k

Thanks for the info

have you tried with aplay as i posted on #9?

Ciao
Andrea

[diytoon]

I will read and check it the coming days...
even at 16 44.1 it plays nice...

[anbello]

Originally Posted by diytoon

I will read and check it the coming days...
even at 16 44.1 it plays nice...

Can i ask you which DAC do you have after the X2 and in which way is connected (coaxial, toslink or i2s)?

Ciao
Andrea

[diytoon]

Originally Posted by anbello

Can i ask you which DAC do you have after the X2 and in which way is connected (coaxial, toslink or i2s)?

Ciao
Andrea

from the X2 it goes into a behringer SCR2496 and then to a Altmann DAC...
all optical.


but so far the behringer shows he receive 16 bits @ 44.1 Khz...

I am exploring ubuntu for the right player...so far I am pleased with the vlc player...

I need to find some time to do some more testing...

I have used a trends usb dac till now...was also very good.

Wanted to see if 24/96 native sound would be something...

kind regards,

Tony

[anbello]

Originally Posted by diytoon

from the X2 it goes into a behringer SCR2496 and then to a Altmann DAC...
all optical.


but so far the behringer shows he receive 16 bits @ 44.1 Khz...

I am exploring ubuntu for the right player...so far I am pleased with the vlc player...

I need to find some time to do some more testing...

I have used a trends usb dac till now...was also very good.

Wanted to see if 24/96 native sound would be something...

kind regards,

Tony

Thanks Tony really kind

i don't know your linux audio skill but if you are using pulseaudio you have everything resampled at a fixed samplerate / bit depth, so if you want to try 96/24 you have to configure your player to talk directly to alsa device.
The more direct way is to use 'aplay' from the prompt of a terminal window first to know the name of the alsa device:

andrea@supermicro:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 0: Intel ICH [Intel 82801DB-ICH4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 4: Intel ICH - IEC958 [Intel 82801DB-ICH4 - IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0

in this example if i would like to play throu "Intel ICH - IEC958" i have to use card 0 and device 4 so the right command is:

andrea@supermicro:~# aplay -D hw:0,4 file.wav

or (if the first give you error about format)

andrea@supermicro:~# aplay -D plughw:0,4 file.wav

with file.wav a 96/24 wav file

Ciao Andrea

[diytoon]

Originally Posted by anbello

Thanks Tony really kind

i don't know your linux audio skill but if you are using pulseaudio you have everything resampled at a fixed samplerate / bit depth, so if you want to try 96/24 you have to configure your player to talk directly to alsa device.
The more direct way is to use 'aplay' from the prompt of a terminal window first to know the name of the alsa device:

andrea@supermicro:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 0: Intel ICH [Intel 82801DB-ICH4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: I82801DBICH4 [Intel 82801DB-ICH4], device 4: Intel ICH - IEC958 [Intel 82801DB-ICH4 - IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0

in this example if i would like to play throu "Intel ICH - IEC958" i have to use card 0 and device 4 so the right command is:

andrea@supermicro:~# aplay -D hw:0,4 file.wav

or (if the first give you error about format)

andrea@supermicro:~# aplay -D plughw:0,4 file.wav

with file.wav a 96/24 wav file

Ciao Andrea

this is whatI have:
mini@toon-minilaptop:~$ aplay -l
**** Lijst van PLAYBACK hardware-apparaten ****
kaart 0: Intel [HDA Intel], apparaat 0: STAC92xx Analog [STAC92xx Analog]
Sub-apparaten: 1/1
Sub-apparaat #0: subdevice #0

thanks for the tip!

[anbello]

Originally Posted by diytoon

this is whatI have:
mini@toon-minilaptop:~$ aplay -l
**** Lijst van PLAYBACK hardware-apparaten ****
kaart 0: Intel [HDA Intel], apparaat 0: STAC92xx Analog [STAC92xx Analog]
Sub-apparaten: 1/1
Sub-apparaat #0: subdevice #0

thanks for the tip!

Strange, i see only the sound card integrated with the motherboard.
Had you connected the teralink x2 before entering the 'aplay -l' command?

Ciao
Andrea

[diytoon]

Originally Posted by anbello

Strange, i see only the sound card integrated with the motherboard.
Had you connected the teralink x2 before entering the 'aplay -l' command?

Ciao
Andrea

correct...X2 was not connected at that time...
saved your command and I will try it the coming days...
there is a long weekend ahead!

[elingeniero]

Originally Posted by anbello

Thanks Tony really kind

i don't know your linux audio skill but if you are using pulseaudio you have everything resampled at a fixed samplerate / bit depth, so if you want to try 96/24 you have to configure your player to talk directly to alsa device.
The more direct way is to use 'aplay' from the prompt of a terminal window first to know the name of the alsa device:

This is not 100 percent true.

In /etc/pulse/default.pa, you can configure default sample rates for each device, thusly.

add-autoload-sink output module-alsa-sink device=plughw:0,0 rate=48000 sink_name=output

But these rates can also be set on the fly. It may be that Gstreamer and other player back ends are not yet able to switch sample rates and bit depths to match files though.

[mb]

Originally Posted by elingeniero

This is not 100 percent true.

In /etc/pulse/default.pa, you can configure default sample rates for each device, thusly.

add-autoload-sink output module-alsa-sink device=plughw:0,0 rate=48000 sink_name=output

But these rates can also be set on the fly. It may be that Gstreamer and other player back ends are not yet able to switch sample rates and bit depths to match files though.

I have had fairly good success with pulseuadio, sample rates and different output devices (hdmi audio, usb 96/24 converter). This may be useful to others trying the same:

1. Sample rate and word-depth can be set on a per-user basis, with a file .pulse/daemon.conf in your $HOME directory. Copy the daemon.conf from /etc/pulse and customize the one in your own directory.

2. Set the following according to your source and output device capabilities:

resample-method = speex-float-2 (or src-sinc-medium-quality if you have a fast CPU)
default-sample-format = s24le
default-sample-rate = 96000

3. If pulse is already running,
$ pulseaudio -k
will kill / restart pulse, using your new settings.

4. If source is 96/24, then playing with these settings should NOT need resampling. If playing CD or 48Khz audio, the audio will upsample with the resampler defined. Checking the CPU usage should confirm this.

Comment: on a fairly fast Dell laptop, only src-sinc-medium resampling is reliable (20% CPU usage). src-sinc-best stutters. Also my UHFnanoS dac (ESI Dr DAC Nano), seems to sound best using 48kHz or 96kz. 44.1kHz sounds harsh.

As manually editing daemon.conf is a hassle, I wrote a little python utility that allows me to change sample/word rate via the applet tray, as I would for network manager

After the pain of figuring out pulseaudio, I find it works rather well. I have an outstanding issue using Alsa (without pulse) on the USB dac... see my next post.