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[Clip+, Clip Zip, ClipV2, FuzeV2] Improve battery life, part 2

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asymsucon:
I'll test with the following cards (only ones I have):
Samsung EVO 128GB
Sandisk Ultra 128GB
Sandisk Ultra 200GB

johnb:
clip+: A night and day difference with the Samsung cards: all the lagging is gone, UI very responsive, no stuttering with real life files so far (some with other hires files which I don't regard as relevant).
Now it makes sense to do thorough testing.

Mihail Zenkov:
johnb:
Good. But can you first test another build with samsung cards?
http://knk.square7.ch/cvdd2/rockbox-clip+-cvdd2_scaling-4.zip
It should be slightly more efficient fix.

johnb:
sure

asymsucon:

--- Quote from: Mihail Zenkov on January 03, 2017, 02:29:38 PM ---johnb:
Good. But can you first test another build with samsung cards?
http://knk.square7.ch/cvdd2/rockbox-clip+-cvdd2_scaling-4.zip
It should be slightly more efficient fix.

--- End quote ---
Variant4
No apparent problems on Samsung 128GB filled to 98%.
Gapless and FLAC HiRes (24/48, 24/192) works without issues, opus with extra resampling in the way too.
BTW, this card works very erratically and glitchy on Fiio players, so it's a great candidate for this test.
Manual track change is a bit slower, sometimes it takes up to 1 second, but overall non-issue.

No audible distortion on 1k sine into 2000Ohm at +6dB. 100ms square wave distortion when going downwards from +6dB to 0dB that happens on +3dB and 0dB step - Non-issue.
Audible pops when approaching +6dB from 0dB on sensitive earbuds with no music playing.

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