Rockbox Development > New Ports

Fiio M3k

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Julian67:

--- Quote from: speachy on June 05, 2023, 09:14:39 PM ---
--- Quote from: Julian67 on June 05, 2023, 08:29:37 PM ---I there any possibility that Rockbox core could ever support 24/32-bit audio?

--- End quote ---

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.

--- End quote ---

I'm just asking because I have no idea:  Would a change from 16-bit to 24 or 32-bit be a huge upheaval?  Would it be impossible to do without dropping support for 16-bit players? Technical query, not a feature request!

cereal_killer:

--- Quote from: vitt13 on May 24, 2023, 09:08:33 AM ---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.

--- End quote ---

I am curious what the interpretation of these graphs is.

speachy:

--- Quote from: Julian67 on June 06, 2023, 12:05:16 AM ---I'm just asking because I have no idea:  Would a change from 16-bit to 24 or 32-bit be a huge upheaval?  Would it be impossible to do without dropping support for 16-bit players? Technical query, not a feature request!

--- End quote ---

At minimum, we'd need to make the audio path variable-width at compile time, so 16-bit only devices don't incur any performance penalty.

A basic question is if we want to unconditionally use 24/32-bit audio on platform that support it, or switch back and forth at runtime.  Switching makes everything a lot more complicated, with multiple code paths and new APIs.

Meanwhile. Our DSP/EQ/effect engine doesn't support >16bit.  Additionally, we'd have to implement 16-24bit conversion for the various codecs/plugins that don't support >16bit audio (that said some of our targets only support 24/32-bit audio so that's already implemented, just not in a generic manner)

Julian67:

--- Quote from: speachy on June 11, 2023, 12:47:46 PM ---
--- Quote from: Julian67 on June 06, 2023, 12:05:16 AM ---I'm just asking because I have no idea:  Would a change from 16-bit to 24 or 32-bit be a huge upheaval?  Would it be impossible to do without dropping support for 16-bit players? Technical query, not a feature request!

--- End quote ---

At minimum....

--- End quote ---

Thank you for a really comprehensive answer.  Appreciated.

mario69:
good morning, I have a problem, my fiio m3k player after two years of excellent functioning with rockbox, I get a message like this:panic -updating size on empty dir entry 4 (and also others Number) Simeone have a solution?thanks

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