Originally Posted by x838nwy
I'm enjoying the Dragonfly and have been for a couple of weeks now. However, I've just looked at it today and I'm a bit worried about the colours of the LED...
I know it changes colour according to the file being played etc. However, when I plug it, the LED is green. Now when I play my iTunes-purchased file (AAC. 44.1kHz) and the light went sort of purple. Then when I play a clip for youtube - which can't be the same sampling freq. seriously?) it stays the same colour. Going back to a sample from HDTracks through iTunes (24/96kHz) and it's still the same colour.
So, I put a CD into my MacBookPro. Played it through iTunes. SURELY this has to be 16/44.1kHz. Nope, still purple.
I can't remember the color vs. freq. exactly, but I thought 44.1 = green and 96kHz = purple, or something.
Am I understanding this the wrong way? Please help.
I was also puzzled when reading about this. Someone said on this site, and perhaps in this interesting thread,
that the Dragonfly does NOT automatically detect/sense sampling rates.
For instance, if you set your audio on Windows 7 to 24-bit/96 kHz and you are feeding your precious Dragonlfy
with a regular 16-bit/44.1 kHz the Dragonlfy LED will be purple and not green (as should be in the case of the Red Book CD audio).
So, what it means the Dragonfly only confirms that you set your audio to 24-bit/96 kHz on Windows since the Dragonfly is not able to check whether the actual audio stream fed into it is, say, 24-bit/96 kHz or 16-bit/44.1 kHz.
By the same token, perhaps much worse is happening in this case, namely the Dragonfly is processing your 24-bit/96 kHz high res audio as the 16-bit/44.1 kHz audio.
So, perhaps the safest way, is to set the audio at 24-bit/96 kHz.
In such a case, you don't need to remember or worry about it any more.
Can someone comment on this?
I think that the same is happening with my ODAC. On Windows 7 I set the audio to the 24-bit/96 kHz as suggested by JDS Labs. Period.
(The ODAC does not have any glowing LEDs.)
This is not a big problem, because we don't quite hear the 24-bit/96 kHz, not to mention the 24-bit/192 kHz.
Nevertheles, we would all feel psychologically better seeing the purple (indicating the 24-bit/96 kHz) LED on
even if playing an MP3 file.
Edited by JakeJack_2008 - 4/4/13 at 11:28am