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Topic: Should I resample to 48kHz during converting to AAC (Opus-like)? (Read 145 times) previous topic - next topic
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Should I resample to 48kHz during converting to AAC (Opus-like)?

I am going to encode my lossless collection of ripped CDs into 144 kbps AAC (QAAC) for listening on both Android phone and Windows (Foobar2k with an onboard Realtek DAC and good speakers/headphones). My goal is to keep it lossy, but make sure I retain enough quality to keep the music transparent for my ears. Should I include 44.1 -> 48 kHz resampler in the Foobar conversion chain to get 16b/48kHz output AAC files? The resampling practically does not affect the conversion speed and resulting file size. The benefit as I can see it will be that my AAC files will match the native sampling rate of my phone/PC DACs, which is as far as I know 48 kHz, thus no need for software resampling during playback - better sound quality and less battery drain.

Such approach was implemented in Opus, and I cannot think of any downsides of it. Are there any? Am I correct in my assumptions? Thanks in advance for the replies.

Re: Should I resample to 48kHz during converting to AAC (Opus-like)?

Reply #1
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thus no need for software resampling during playback - better sound quality and less battery drain.
My assumption would be, no difference...  so probably no harm...

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does not affect the conversion speed and resulting file size.
The file size is given by the bitrate - 144kbps = 144 kilobits per second.   And if you know there are 8 bits in a byte, 18 kilobytes per second, or 1080kB per minute.   (Maybe plus some space for any embedded album artwork and/or other metadata.)

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16b/48kHz output AAC files?
There is a sample rate but AAC (and MP3, etc.) don't save individual samples so there is no bit depth.


Re: Should I resample to 48kHz during converting to AAC (Opus-like)?

Reply #2
Will changing sample rate from 44.1 to 48 kHz affect the efficiency of conversion (sound quality) at given bitrate?

Re: Should I resample to 48kHz during converting to AAC (Opus-like)?

Reply #3
Nope, but I would stay at 44.1 kHz.
Most ABX tests were performed 44.1 kHz.
qaac is Apple encoder and Apple sells 44.1 kHz music so it is safe to assume that most tunings were done at 44.1 kHz.
Everything above 16/44 is scam.
Always download first release, never remastered/HD release.

Re: Should I resample to 48kHz during converting to AAC (Opus-like)?

Reply #4
Thank you.

 

Re: Should I resample to 48kHz during converting to AAC (Opus-like)?

Reply #5
Probably what I need to do is to try to find out if I can hear any difference between 44.1 and 48 kHz AAC files on my hardware.

 
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