Wondering about 48khz (samplerate) playback on e200v2

[Chesteta]

Hello, I was wondering about the audio signal 'path' on my e200v2, there have been some prior posts asking about 48khz playback on other players however they all seem to be old and I didn't want to resurrect them...

So, does it have the capability of 48khz playback? I had actually been re-sampling all of my music to 48khz (among other processing) since I was under the impression that the AS3525 has a 'default' sample rate of 48khz (see here for more discussion on that: http://forums.sandisk.com/sansa/board/message?board.id=sansafuse&thread.id=17726&view=by_date_ascending&page=1)  Does Rockbox still re-sample to 16bit/44.1khz in software before outputting the audio? ... If it does I would like to humbly request that there be a bypass for this   Thank you for your help!

-Matt

[AlexP]

Rockbox resamples everything (not very well) to 44.1 kHz.  Fixing this would be nice, but a lot of work and someone that cares enough needs to step up and do it.

[Chesteta]

hmm so it would  be better (currently) to use a 44.1khz rate for my files?  ... i'd fix it, though I don't know enough to do so

Edit/addition: I realize that Rockbox is a user-supported OS however I have always felt that the user base of Rockbox was more 'quality oriented' than the "typical user"; this is just the impression I got though, how much work would it be to disable the sample rate converter?

[saratoga]

hmm so it would  be better (currently) to use a 44.1khz rate for my files? 

Yes.  Resampling will result in reduced battery life, wasted disk space and greatly reduced audio quality in rockbox.

Edit/addition: I realize that Rockbox is a user-supported OS however I have always felt that the user base of Rockbox was more 'quality oriented' than the "typical user";

Hence most prefer to use audio at the correct sampling rate, rather then reduce quality by using a different sampling rate.

this is just the impression I got though, how much work would it be to disable the sample rate converter?

Probably a lot of work.  We have a lot of DSP code that assumes 44.1khz.

[Chesteta]

Got it, thanks saratoga; for the record I thought I was avoiding a device sample rate conversion since the max sample rate for the as3525 is 48kHz (so I presumed the DAC's used that sample rate when outputting and that everything would be re-sampled before conversion)

To be clear, I was wrong about the DAC's re-sampling to 48kHz for output correct?

[saratoga]

To be clear, I was wrong about the DAC's re-sampling to 48kHz for output correct?

Did you see AlexP's reply?

[Chesteta]

Yes, I was referring to the 'hardware side of things' I get that all of the 'software side' of Rockbox operates at 44.1kHz, but there could still be a conversion after the software side to the default rate of the chip, so a 'hardware conversion' to 48kHz is what I meant (at least that was my idea/concern). Trying to increase my understanding of how things work

[saratoga]

Yes, I was referring to the 'hardware side of things' I get that all of the 'software side' of Rockbox operates at 44.1kHz,

The two have to operate at the same sampling rate.  If you do not operate them synchronously, the audio plays too fast or to slow with incorrect pitch.

[Chesteta]

Ok, thank you for your help and patience, gonna go re-convert (EQ) my music with 44.1kHz