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Rockbox resamples everything to 44100Hz. On some players you can toggle this to 48000Hz. So a comparison between Rockbox and original firmware might not be so useful if the audio file is 192000 Hz.
Quote from: Julian67 on June 01, 2023, 09:10:06 PMRockbox resamples everything to 44100Hz. On some players you can toggle this to 48000Hz. So a comparison between Rockbox and original firmware might not be so useful if the audio file is 192000 Hz. Actually, Rockbox will only resample if the hardware cannot handle the "native" sample rate for a given file. I know this because I'm the one who implemented it. So on hardware that can go up to 192KHz, we can play back 192KHz files, albeit at 16-bit only since we don't have support for 24/32-bit audio in the core.(That said, the choice of playback freq and any resampling is up to the invididual codecs, so it's certainly possible some or many of them have their own rules/heuristics)
I there any possibility that Rockbox core could ever support 24/32-bit audio?
Quote from: Julian67 on June 05, 2023, 08:29:37 PMI there any possibility that Rockbox core could ever support 24/32-bit audio?Possibility? Of course. But it's not terribly likely at the moment; only a handful of the players have hardware that supports it, and need to implement in a way that doesn't bloat things for 16-bit-only players, and there's not exactly a lot of folks contributing code. Or contributing much of anything, really.
I've got few measurements for digital filters and DAC power mode illustrations.Test signal is local file generated in REW software. 4kHz square signal, 192k sample rate, PCM24.
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