Jump to content

Poweramp downsample 48 khz to 44.1


Recommended Posts

Hi,I'm not an expert,I only know some basics but I need help with something,Poweramp downsamples sample rate to 44.1 khz when with other players I can achieve 48 khz,thing is this,my phone in other player achieve 48 khz with aptx (non hd) of my Bluetooth earphones but when I go to Poweramp it downsamples to 44.1 ,why? Aptx support 48 khz and my phone supports higher than. 48 too ,I want to achieve bit perfect with my Bluetooth earphones with aptx codec since my files are 16 bit wav and 48 khz ,again why does it downsamples? 

Link to post
Share on other sites

Poweramp automatically chooses the target BT codec sample rate (44.1kHz in your case). That rate is specifically reported by bluetooth stack and used by audio flinger.  Forcing 48kHz means double resample for 44.1kHz tracks. 

 

Link to post
Share on other sites
  • 4 weeks later...

Again this is what I don't understand

IF my phone SUPPORTS 48 khz and/or higher and SUPPORTS APTX and in earphones have APTX with max sample rate at 48 then why Poweramp downsamples it? Basically what I see is I should play 48 wav with no problems and resampling

Link to post
Share on other sites
19 hours ago, SeMoZaKi said:

Again this is what I don't understand

IF my phone SUPPORTS 48 khz and/or higher and SUPPORTS APTX and in earphones have APTX with max sample rate at 48 then why Poweramp downsamples it? Basically what I see is I should play 48 wav with no problems and resampling

Because Bluetooth would resample to 44.1. Or so Max says.

Link to post
Share on other sites

I know this is off topic but since you guys are experienced audiophiles I have a doubt please explain,I read when you match Dolby contents ac3 file plus a device compatible dolby it enhances the experience a lot ( I know its kinda obvious) but is it totally true? Because my phone has Dolby Atmos preinstalled and when I turn it on with songs converted to ac3 it sounds so awesome,like surround effects on songs are more defined and the song sounds quite impressive!

Link to post
Share on other sites
31 minutes ago, SeMoZaKi said:

I know this is off topic but since you guys are experienced audiophiles I have a doubt please explain,I read when you match Dolby contents ac3 file plus a device compatible dolby it enhances the experience a lot ( I know its kinda obvious) but is it totally true? Because my phone has Dolby Atmos preinstalled and when I turn it on with songs converted to ac3 it sounds so awesome,like surround effects on songs are more defined and the song sounds quite impressive!

That seems to be a multi-Channel-encryption

https://whatis.techtarget.com/fileformat/AC3-Dolby-Digital-audio-files-used-on-DVDs

Quote

AC3 is a file extension for surround sound audio files used on DVDs format.  The AC3 file format was created by Dolby Labs for use in a Dolby Digital audio on DVD, Blu-ray and other digital video formats. AC3 stands for Audio Coding 3.

AC3 increases fidelity over its previous surround sound standard, Pro-logic, with independent tracks for each of the 6 speakers, a 16bit sampling at 48khz rate compressed by 10- 12 times, making for a total bit rate of 384kbps.

The question would be : how do you get the ac3-songs ? If you convert them from mp3 then any effects are just effects.

Link to post
Share on other sites
2 hours ago, blaubär said:

That seems to be a multi-Channel-encryption

It can be, but not necessarily. AC3 streams - aka Dolby Digital - can also contain a regular stereo pair. Mostly found on  home video formats though (BluRAY, DVD, etc) so not really something PA would normally expect to encounter.

Andre

Link to post
Share on other sites
7 hours ago, blaubär said:

I don't download download ac3 songs I convert wav to ac3, I feel it improves surround effects by A LOT! I'm thinking in settling down for ac3 ,and yes I know about the codec is used for DVDs but there are songs recorded in Dolby (in some rare case there is song recorded in dolby) anyway,when I match the converted wav music to ac3 with Dolby Atmos in my Android it sounds like the first time you hear lossless music

Link to post
Share on other sites
  • 1 year later...

good question! I'd try to understand this more then 2 years... Why Poweramp from 1 step, if i chose "system default" resample 44.1 file to 48, and after  EQ and others, in the last step, bluetooth codec aptxHD show me same 44.1? Too much operations which makes more distortions, use resources etc... That is why i always change first step option manually - same as file samlerate 44.1 or 48... 

Maybe, it's possible to make autofunction? I'am not developer or specialist, but it's look's easy for understanding coder  (if SR of file = SR bluetooth device  than SR hiresout = SR of file, else SR hiresout = SR bluetooth device). Will be grat setting check box!

But this option fix half of trouble: let's come back to your question, (my looks like same) - why if audio file SR is 48 kHz bluetooth codec aptxHD chose 44.1 SR (resamle)? Same, if file 44.1 and i did not manually chose 44.1 in hiresout setup, it's resamle first time to 48 and next time to 44.1 output device...

There are official "how it works" annotations about aptx and other audio codecs, and many forums i read - can't understand, why? if aptxHD codec support 24bit/48kHz and isn't change bitrate on-the-go, I CAN'T CHOSE 48kHz parameter ??? It's didn't chosen automatic "system default", and  didn't manually... Not only Poweramp, other players do the same.      (:D Windows chosen 16/44.1 aptx, even "bluetooth tweaker" show all possible codes SR and bit.).    If i try to change SR at Developer options - it's didn't work, back to 44.1, codec type and bit 16/24 - can change.

(Now use mi mix 2s, china original miui12, no unlock, no root) 

Really, just want to understand - which part/parameters/ets... do it impossible? 

PS Sorry, my English is so shit

Screenshot_2020-10-31-01-41-30-454_com.maxmpz.audioplayer.jpg

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...