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Did a resampling of the Joni Mitchell album Blue, to 16 bit 44.1 khz, in foobar and I agree . It is accualy better on the sansa now.
I think that the quantization noise of the 12 bit recording will be easily noticeable and distinguishable from the ambient noise.
Please do not mix quantization and ambient noise. They are very different things. The ambient noise is a part of the recording (EDIT: which is usually desired).
Many targets of RB are well designed, enable higher sample rate and bit depth may get better sound quality?
Unlikely. Can you hear frequencies above 22 KHz? Can you hear noise 96 dB down in a mix?The only reason you might hear a difference with native 48 playback is where Rockbox's 48->44 resampler is poorly performing. This could be addressed for the benefit of all.
Quote from: soap on September 28, 2010, 06:48:07 AMUnlikely. Can you hear frequencies above 22 KHz? Can you hear noise 96 dB down in a mix?The only reason you might hear a difference with native 48 playback is where Rockbox's 48->44 resampler is poorly performing. This could be addressed for the benefit of all.emmmmm, you're justified in this. it seems the only meaningful thing for RB (and a DAP) is enabling 48khz playback.
[..]Unlikely. Can you hear frequencies above 22 KHz? Can you hear noise 96 dB down in a mix?[...]
It IS enabled. Not hardware 48 playback, but 48->44.1 resampled playback. Do you have a specific audible issue with it as it stands now or a theoretical distrust of it?
Quote from: soap on September 28, 2010, 08:26:43 AMIt IS enabled. Not hardware 48 playback, but 48->44.1 resampled playback. Do you have a specific audible issue with it as it stands now or a theoretical distrust of it?i don't trust resample like 48<->44.1, that's not integral, deteriorates sound quality.
No we aren't. By the Nyquist-Shannon sampling theorem, you only need the sample rate to be double the highest audible frequency. So, unless you can hear above 22KHz, there's no need to use a sample rate higher than 44KHz.
there is a very good argument for higher samplerates though... the closer you get to the upper end of the frequency range supported by the samplerate the more aliasing... higher quality DACs of course handle that aliasing better than lesser DACs but also higher samplerates eliminate much of the aliasing simply by having the increased resolution
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