Support and General Use > Audio Playback, Database and Playlists
Enabling 24bit-44.1/48/88.2/96khz playback - iAudio and others?
soap:
--- Quote from: jaylee on September 28, 2010, 07:11:58 AM ---
--- Quote from: soap on September 28, 2010, 06:48:07 AM ---
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.
--- End quote ---
emmmmm, you're justified in this. it seems the only meaningful thing for RB (and a DAP) is enabling 48khz playback.
--- End quote ---
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?
Benway:
--- Quote from: soap on September 28, 2010, 06:48:07 AM ---[..]
Unlikely. Can you hear frequencies above 22 KHz? Can you hear noise 96 dB down in a mix?
[...]
--- End quote ---
Humm, I think you're confusing sample rate and audible frequency. ???
Of course a sample rate of 22 kHz is audibly better than 44 Khz. This has nothing to do with being able to hear frequencies above 22 kHz.
torne:
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.
jaylee:
--- Quote from: soap on September 28, 2010, 08:26:43 AM ---
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?
--- End quote ---
i don't trust resample like 48<->44.1, that's not integral, deteriorates sound quality.
Llorean:
Whether or not it deteriorates sound quality, the important question is whether it audibly does so. Rockbox has many optimizations that deteriorate sound quality in one way or another in minimalistic ways allowing files to, for example, be decoded faster. But if the amount it deteriorates is something you can't reasonably distinguish, does it matter?
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