New 4.1 firmware now reduced kb/s on cd rips?

Posted by: John3 on 15 December 2014

I have downloaded the new 4.1 firmware for my NDS, however when playing a CD rip the displayed kb/s is no longer 1411 kb/s but a lower number varying between 700 kb/s and 900 kb/s depending on the track. My files are FLAC.

 

Anyone else noticed this?

Posted on: 15 December 2014 by DavidDever

That's probably correct behavior, yes? (unless you are using uncompressed FLACs)

Posted on: 15 December 2014 by John3
Originally Posted by DavidDever:

That's probably correct behavior, yes? (unless you are using uncompressed FLACs)

No, until the update cd rips always showed as 1411. The rips use compression.

Posted on: 15 December 2014 by Mougenot
Originally Posted by John3:
Originally Posted by DavidDever:

That's probably correct behavior, yes? (unless you are using uncompressed FLACs)

No, until the update cd rips always showed as 1411. The rips use compression.

same result for me, after update of my ND5XS

Posted on: 15 December 2014 by Nick Lees

Yup. I'm getting 673kb on a 16bit track that'd normally show 1411kb

Posted on: 15 December 2014 by Bananahead

This is actually correct. It must have been faulty before. Try converting to WAV on the fly and it should go higher.

Posted on: 15 December 2014 by Nick Lees

It may be "correct", but I'd rather know "is this 16 or 24 bit". It was odd enough having to convert a kps figure without now having to guess the FLAC compression ratio.

Posted on: 15 December 2014 by Bananahead

Yes the streamer should tell you if it is 16 or 24 and at what sample rate. Maybe in the next release..

Posted on: 15 December 2014 by Dutch Naim User

Same situation here: significant lower bitrate than before downloading 4.1! Files on nas are not changed ofcourse. Bitrate was correct before and is now wrong. Mmmmm, typical. You get Spotify and you get down in bitrate/quality?

 

Unitylite, Synology NAS, CAT6.

 

any suggestions?

 

thanks,

 

Edwin

 

 

Posted on: 15 December 2014 by Nick Lees

You're not getting less quality, the App is (I think) is simply saying what the compressed rate is rather than the rate after uncompressing to play the music, as the man with the strangely shaped yellow head said

Posted on: 15 December 2014 by Dutch Naim User

Never to old te learn. I hope. But were go i wrong in my thought that bitrate= samplingrate* bitdepht*channels.

example: CD 44100 Hz, 16 bit, 2 Channels. BR=1411,2 bit/s

Isn't this independent from the compression? 

Posted on: 15 December 2014 by Mike-B

On NDX,  & would have thought its the same with NDS,  the streamer screen & the app do not show bit depth,  it shows only the codec & sample rate   e.g. .FLAC 44.1kHz & "the number" in question. 

This is the way it was before upgrades & the way it is after upgrades with my system with .WAV  (sorry I don't have .FLAC any more) 

This number is the math of the streamers sample rate X bit depth X 2 (channels).  So it seems the streamer has a problem with something in the sample rate data,  is that possible & how does it know about compression ratios - if indeed that is the problem,  or maybe its in the media server. 

 

It may be worth looking into the UPnP media server as thats were most of this stuff is happening. 

I had a problem with this number when my Synology NAS could not transcode to .WAV. The UPnP media server was not able at that time to support 24bit & converted to 16bit, hence the lower number.

Posted on: 15 December 2014 by Nick Lees

WAV shows the right figure, FLAC shows whatever the compressed bitrate is. It's not helpful. 16 or 24 would be plainer.

 

It's nothing to do with the UPnP server.

Posted on: 15 December 2014 by Bananahead

Just use the things on the side of your head to tell if it's 16 or 24 bit.

 

 

( oh no what have I suggested ? )

Posted on: 15 December 2014 by Hmack

Bananahead originally posted:

 

"Just use the things on the side of your head to tell if it's 16 or 24 bit".

 

And if the things on the side of your head let you down, you can always use the things on the front of your head to check the colour of the display on your Hugo.

 

What!! - you don't have a Hugo?

Posted on: 15 December 2014 by DavidDever

The actual network bitrate is more helpful when troubleshooting bandwidth issues, but I do agree that it might be useful to show codec / {compression level /} bit-depth / sample rate as an alternative.