[JK1]

Anyone here do any tests?

 

[JK1]

Anyone?

 

[JaZZ]

I don't really know (guess not), but bitrate does affect battery life. Maybe the file size is decisive, as it defines how much data have to be processed. It may depend on the audio format, though; Ogg Vorbis e.g. is known to need more processing power than MP3, despite potentially smaller files.

 

[rmullins08]

I think Jazz is correct that the file size matters.  2 of the same file, with CBR and VBR if they are the same file size should be the same for processing power.  If the CBR is a larger file size it might use more battery processing the file

 

[JK1]

  I think Jazz is correct that the file size matters.  2 of the same file, with CBR and VBR if they are the same file size should be the same for processing power.  If the CBR is a larger file size it might use more battery processing the file

File size is not the most important factor though. For example, for spoken word podcasts, I use 32 kbps mp3 files on my Sandisk players.While this does give around 10% more run time compared to my 256 kbps music files, this difference seems to be much smaller than the difference in run time between mp3 files and non protected WMA files at the same bit rate. I estimate that WMA files get somewhere between 15% and 20% shorter run time on Sandisk players than mp3 files at the same bitrate.

 

[JaZZ]

MP3 is the battery-friendliest format, as far as I know. And considering the sound-quality/file-size/processor-straining ratio VBR is most likely the best solution.

 

[JK1]

I am looking for some numbers for vbr vs cbr, not just guesswork.

 

[JaZZ]

So why not do the test yourself? I'm not going to do it for you.

 

[JK1]

  So why not do the test yourself? I'm not going to do it for you.

I am hoping that some people have already done some testing.

 

[rmullins08]

  File size is not the most important factor though. For example, for spoken word podcasts, I use 32 kbps mp3 files on my Sandisk players.While this does give around 10% more run time compared to my 256 kbps music files, this difference seems to be much smaller than the difference in run time between mp3 files and non protected WMA files at the same bit rate. I estimate that WMA files get somewhere between 15% and 20% shorter run time on Sandisk players than mp3 files at the same bitrate.

 
No disagreement there.  Was simply going on VBR/CBR for MP3.  Different formats definitely will have different results
 

  I am hoping that some people have already done some testing.

 
It's going to be device dependent.

 

[JK1]

   
No disagreement there.  Was simply going on VBR/CBR for MP3.  Different formats definitely will have different results
 
 
It's going to be device dependent.

I'm not so sure about that, although  I would like to see tests using a few different players.I have a feeling all will likely show longer battery life using cbr files. How much longer is the question.

 

[rmullins08]

I'd say any differences are probably negligible in today's devices.  The processors/storage devices are fast enough that processing mp3s is an easy task when they are also capable of decoding DSD files.