Posts

Raspberry PI - I2S-HATs @ 384k

Today I'd like to explain how to introduce 352k8/384k upsampling 
via LogitechMediaServer as server and squeezelite as a client.

This post, from a hardware perspective,  pretty much relates to my 
RPI I2S HAT DAC projects I've been running over at DIY-Audio.

Some DACs have shown a slightly better performance when running upsampled 
material. That's the main reason for writing all this up. 
The experienced differences havn't been earth-shattering IMO. 
I still think this exercise is worth a try.

Afaik, there's no guideline elsewhere.


Shoot the Trouble -- USB Audio Interfaces

With all the very interesting Raspberry Pis and other ARM devices around, Linux becomes more and more interesting for many people. Great audio transports can be build at 35$.
Not to forget. Tablet and Phones are mainly Androids and that is just another Linux, using the same soundlayer (Alsa) then all other Linuxes.

Manufacturers usually still do not commit to support Linux or Android. Which is insane. The vast majority of mobile device out there are Androids.

However. Many devices work or partially work under Linux, because manufacturers comply to general USB Audio Standards (UAC1/UAC2). Meanwhile even Pro Audio companies like RME offer a "Class Compliant" mode for their newest generation of USB devices. (In the RME case they do officially focus on OSX though.)

This article intends to give some trouble shooting and tuning guidance in case of "No SOUND" or "XRUN" issues.


Hirez - Treasure Island - Part II

Today we cover HiRes (that covers DSD as well) vs. Redbook.

In the first blog about Hirez I covered the base HiRez material.

My conclusion was.

Hirez material usually gets resampled and remastered from unkown raw masters (formats).
There is ususally nothing like a master for sale out there.


Bake me some Pi - perhaps a Raspberry Pi !?!?

Guess what!?!?

I finally bought a Revision 2 Raspberry Pi with 512MB Ram.

You can't avoid stepping over PI followers on every 2nd corner.

And these people usually talk about great SB Touch replacements, audiophile experiences
or similar.

I had to buy one too.

Initial post: 9/2/2013
Update: 9/9/2013


Squeeze Me Lite

Latest update: 11-Apr-2017



I'd like to introduce you to a tiny squeezebox streaming client called squeezelite.

Squeezelite is a highly efficient squeezebox emulator that runs on all PC platforms, 
micro computers, like a Raspberry Pi,  even on routers and on the Squeezebox Touch . 
It's opensource and free.

Squeezelite was originally written and maintained by Adrian Smith also known 
as Triode.Adrian Smith, the person, who also contributed the EDO plugin 
(USB support) for the Squeezebox Touch and numerous other great SW enhancements. 
From one day to another Adrian disappeared a couple of yours back. 
Since then Ralph Irving, also known as "Ralphy", maintains squeezelite. 

squeezelite is a headless client. Headless because it acts like a system-service or daemon
in the background of your OS.  Basically very similar to MusicPlayerDaemon.

squeezelite requires a LogitechMediaServer (free) - a nowadays community maintained media server - to work. LMS and squeezelite can be installe…

The silent death...

Hi folks.


Do you sometimes have the feeling, of not feeling comfortable the way you handle and administrate your valuable music ( and video and image) collection?

You don't really know -- if all the audio file integrity is still given  (after all those years of moving files here and there) !?!?



Loundess war - finally over ???

Image
Hi folks.

Anybody heard about EBU R128??

To be honest. I didn't until recencly.

I accidently stepped  over EBU R128 (EBU=European Broadcasting Union, R128=Recommendation 128) while looking for a better ReplayGain solution.

R128 finally defines a standard how loudness should be measured and applied in an acceptable way.

The standard was based on  ITU BS.1770 ( International Telecommunications Union) released in 2006.
ITU BS.1770  has been widely applied in the broadcasting scene.
EBU R128  significantly enhanced that standard by a function called gating (You'll learn more about it later on.)  The original ITU BS.1770 has been updated to ITU BS.1770-3 by now and includes the gating function as proposed by EBU R128.

Not only us - audio geeks - have a huge problem with low quality music and messup of audio data due to "Loudness War" - NO - broadcasters face the same challenge on a daily basis.  They can not sit down and change the volume on every piece they are broadc…