Quote: Man, you're a genius. Seriously. This explains everything, and by 'everything' I mean the incorrect thread name.

Quote: Well, if you take a quick look at the technology, you may deduce it is lossless.   However, apt-X uses a max. bitrate of 352 kbps; and the compression algorithm is not even close to perfect, either.   => Audio track encoded with apt-X for Bluetooth streaming is something like...

Kleer is the only truly lossless technology for wireless listening, IMO. Unfortunately, there are few devices that can prove me right. On second thought, I can mention AKG K-840KL.   Apt-X is a lossy codec, though it is able to use the bandwidth of a Bluetooth connection very efficiently...

Quote:   Well, first of all, you need some high-quality source. FLAC files or WAVs taken from any Audio-CD are good enough. Then you have to use some audio converter (iTunes will do, it supports MP3 and AAC codecs) or some audio editor (I used Wavepad) to convert your audio track into...

@kkl10   I took the song from the album 'Renaissance: the Mix Collection' by Gui Boratto, it is indeed very cool.   There were some studies which revealed that a little compressed music (with high frequences chopped off) actually sounds better to a human ear. Most of audio tracks we can...

Quote: Yes, you're right. Almost all audio editors allow to do the analysis of the frequency range; that's the best way to tell if your files are lossless or lossy.   Check out the screenshot (Wavepad Sound Editor).  Though the frequency range does not tell you the whole story, as...

Quote: OGG is better if you are going to use low bitrate (128 Kbps or even less). If that's the case, OGG is really the best option for lossy compression, as 128 Kbps OGG Vorbis file will have a frequency range of about 1 ~ 19.000 Hz (just like a 256 Kbps mp3 audio). Increasing the...

Here is the correct answer to the test. Only a few of your guesses match the reality, which is somewhat surprising. Thanks to everyone for trying anyways!      

You can use any audio editor to check the frequency range of the file. I personally like Wavepad Sound Editor (no advertising intended). If the highest frequencies of your file are below 20.5 kHz (check out the screenshot, ~ 18.5 kHz), then the file has been previously compressed with some...

First of all, this blind test is unique, as not only mp3-encoded files are used for samples. More details below.   I'd like to check if there are actually people with 'gold ears'; 4 audio samples of the same track, Daten-Ubertragungs-Kusschen by Dominik Eulberg, are going to help me with...