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1
Audio Hardware / Re: Analytical headphone + dac&amp
Last post by kose -
The voltage out should be regulated and filtered on device anyway, otherwise you are going to have problems.
I agree with you, but it would be hard to expect to get proper implementation of regulation and filtering in couple hundred $/€ amplifier.
2
General Audio / Volumio UPnP
Last post by danielfelix -
Hi, I want to use Foobar with Volumio via UPnP, I installed the required plugins (foo_out_upnp and Foo_upnp) but only a white noise is heard. In the interface of Volumio I see the data of what I am reproducing in Foobar.
What am I doing wrong?

Daniel
3
Validated News / Re: Opus 1.2 is out!
Last post by jmvalin -
Yeah, we had to do a 1.2.1 release to address an issue where the encoder would sometimes think the signal is low-passed at 12 kHz and not encode information above that. So it's better to upgrade to 1.2.1. The windows builds aren't on the website yet, but you can get Win64 builds from:
https://ci.appveyor.com/api/buildjobs/pd5jp1d0dv3ml1w7/artifacts/opus-tools.zip
and Win32 builds from:
https://ci.appveyor.com/api/buildjobs/0532d1twvfk2gwqm/artifacts/opus-tools.zip
4
Ogg Vorbis - Tech / Re: OGG chaining libvorbis android
Last post by silent10 -
I am using libvorbis to encode recorded PCM data on android. I am implementing pause/resume capability for that I have to chain multiple ogg logical bit streams into one physical bit stream but when I do that I get a file that shows wrong duration and is unseekable. It plays the audio in the correct order though. What am I not doing or doing something wrong?

That file plays correctly in foobar, including seeking between tracks.

Are you sure your software actually supports chained files?  A lot does not.

In VLC player, I can seek position within the stream which is playing but I cannot seek from stream 1 to stream 2 and vice versa. Also, I have just download foobar, it perceives that file as two separate tracks.

Should I multiplex instead of chaining?
5
Ogg Vorbis - Tech / Re: OGG chaining libvorbis android
Last post by saratoga -
I am using libvorbis to encode recorded PCM data on android. I am implementing pause/resume capability for that I have to chain multiple ogg logical bit streams into one physical bit stream but when I do that I get a file that shows wrong duration and is unseekable. It plays the audio in the correct order though. What am I not doing or doing something wrong?

That file plays correctly in foobar, including seeking between tracks.

Are you sure your software actually supports chained files?  A lot does not.
6
Audio Hardware / Re: Analytical headphone + dac&amp
Last post by saratoga -
As I understand some op-amps distorts/colors signal more than others and 5€ wall charger will not be a good choice, not that I am going to invest a lot in "clean power", but I guess it needs to be decent.

I use $20 wall warts with multi-thousand dollar RF amps.  They're recommended by the manufacturer.  Any amp power supply needs to be reliable, but a quality device should not be influenced whatsoever by the power supply, except in the event that it catches fire.  The voltage out should be regulated and filtered on device anyway, otherwise you are going to have problems.
7
Audio Hardware / Re: Analytical headphone + dac&amp
Last post by kose -
The DT880 is great, and it certainly wasn't released only 12 years ago. The first DT880 left the factory in 1980
I could be wrong, but the latest revision of it that is currently being sold was released in 2005.

And forget all about opamp rolling and "cleaner power", it's audiophool nonsense.
As I understand some op-amps distorts/colors signal more than others and 5€ wall charger will not be a good choice, not that I am going to invest a lot in "clean power", but I guess it needs to be decent.

Speaker & headphone technology hasn't changed much in maybe 40-50 years or more.
That is a valid point. However, I believe there is still a room for innovation. We see how Sennheiser, a well respected company among professionals, releases new products and there other well respected companies that do the same. I doubt that their new products are the same in terms of quality.

Quote
The max I am willing to spend is 1200€,
That's a lot!
Not that much when I see prices of m920, DAC3 or SR-009 :).

Actually, I would be willing to know, which headphones are being used by professionals to master records in the biggest studios worldwide. I was surprised when I found out that famous Abbey Road recording studio is apparently using the old DT102:

8
Ogg Vorbis - Tech / Re: OGG chaining libvorbis android
Last post by lithopsian -
Seems OK here. Is your decoder just not able to understand the chaining?

Chaining in an ogg container is as simple as it gets. Just concatenate two separate ogg files together, the result is a chained file.

*#$%^^% stupid quick-edit! Try again

Edit: OK, it does seem like something is wrong. The second stream does not play to the supposed end at 21 seconds. It may be corrupted, I haven't looked in detail.
9
Audio Hardware / Re: Analytical headphone + dac&amp
Last post by DVDdoug -
Quote
My only concern is that it was released 12 years ago and I am surprised that no other better headphones were release until then.
Speaker & headphone technology hasn't changed much in maybe 40-50 years or more.   A basic dynamic driver design uses a magnet, voice coil, and cone/diaphragm.  There are some "new" materials, but the basic design is the same.

The most recent "innovation" is speaker design is the use of computer algorithms (maybe in the 1980s?) to apply the Thiele-
Small parameters to predict bass response.    That doesn't necessarily make a better speaker, but it makes it easier to design a good speaker because it takes less trial-and-error.  But, that doesn't apply to headphones.

Quote
The max I am willing to spend is 1200€,
That's a lot!   There are some really good headphones starting in the $200 - $300 USD price range and in a "blind" listening test you might prefer something more affordable.    Above a certain price range, it becomes largely a matter of taste & preference (and comfort, style, prestige, etc.).       Because of the way they interact with the ear, headphones are hard to measure (and different labs/manufacturers may get different results) it can be hard to objectively say, "A is better than B".   (Most "audiophiles" will agree that the most expensive headphone sounds best!   :D )

Quote
I am looking for analytical/non-colored/studio headphones
I don't like the term "analytical" because it's one of those audiophile terms that's hard to define in real meaningful-measureable factors of frequency response or distortion.  But, "non-colored" is OK.  
10
Ogg Vorbis - Tech / OGG chaining libvorbis android
Last post by silent10 -
I am using libvorbis to encode recorded PCM data on android. I am implementing pause/resume capability for that I have to chain multiple ogg logical bit streams into one physical bit stream but when I do that I get a file that shows wrong duration and is unseekable. It plays the audio in the correct order though. What am I not doing or doing something wrong?
what is the meaning of absolute granular position of these pages?

page 1: 0 0 0 0 0 0 0 0
page 2:  0 0 0 0 0 0 0 0
page 3:  0 0 0 0 0 0 19 -64
page 4: 0 0 0 0 0 0 41 -64
page 5: 0 0 0 0 0 0 65 -128
page 6: 0 0 0 0 0 0 88 64
page 7: 0 0 0 0 0 0 110 64

I am placing the second logical bit stream after the first logical bit stream but still I am getting this bizarre error of wrong duration and unseekable playback. Please can someone tell me the correct way of chaining multiple OGG bit streams?

This is the output of ogginfo on an chained ogg file
Code: [Select]
Processing file "G1.ogg"...

New logical stream (#1, serial: 03d2ac71): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20101101 (Schaufenugget)
Channels: 1
Rate: 32000

Nominal bitrate: 189.949000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
        ENCODER=JNIVorbisEncoder
Vorbis stream 1:
        Total data length: 305896 bytes
        Playback length: 0m:13.311s
        Average bitrate: 183.831731 kb/s
Logical stream 1 ended
New logical stream (#2, serial: 34c74667): type vorbis
Vorbis headers parsed for stream 2, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20101101 (Schaufenugget)
Channels: 1
Rate: 32000

Nominal bitrate: 189.949000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
        ENCODER=JNIVorbisEncoder
Vorbis stream 2:
        Total data length: 488682 bytes
        Playback length: 0m:20.992s
        Average bitrate: 186.235518 kb/s
Logical stream 2 ended