Rockbox Ports are now being developed for various digital audio players!
When decreasing from +6dB (i.e. in the + range) I hear sometimes a click (similar to transitioning the -40dB threshold).
Good But be warned: at >0 dB it consume more power than current rockbox.
Still, it seems that the best way to measure this consumption would be on a used opened unit with a PSU instead of 3.7V li-ion battery. This battery benchmark will produce different results based on 'wear level' of each user's battery and is thus a poor indicator of how much energy was saved compared to dev build.
From your 30-hour figure, that'd be around 38mW during playback (3.7V@290mAh). That's insanely low!
Just for comparison, Fiio X5II consumes about 25 times more, Fiio X7 over 40 times more!
I'm curious. How much more approximately? Having an undistorted 1V RMS into 600Ohm load would be worth sacrificing a bit of battery runtime, but depends on how much.
The battery lasted 9 hours and 14 minutes. Not an improvement from regular version. During the test the UI was somewhat unresponsive.
But it have external DAC and AMP so it should consume more. Probably it also can be optimized.
I will try measure it later. In any case - better have high volume with higher power consumption than unusable high volume with clipping and lower consumption.
The max size of Transcend I have is 32GB and atm I don't know in which device (camera, cell phone, dap) these are buried ...I feel Sandisk is a good bet for larger cards. I will test a different Sandisk 128GB later ...
* still the same navigation issues with my Samsung EVO 64GB -> empty dirs* different Samsung 64GB: Startup and scanning disk takes long. I can play songs from SD. Resume playback after boot (on a flac file) -> starts to play, pauses, plays, pauses ...
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