If you insist, I can turn off the volume lock during black screen and see if I can come back in one piece to report my findings.
Sure but just don't send me the doctor bill in case your ears bleed when testing it outside
Tme to report on my little experiment on the Volume knob safety issue
First of all, I have remove all control lock during locked screen mode.
This is my daily waist bag.
Flip it open and you'll see my mobile phone, i5, and extra battery for my phone, together with the key and the traffic card, I have all I need for daily-commute without reaching out for my backpack. You can imagine the belt-bag will be quite busy while I am using the DAP on street.
After using the i5 without volume lock for 3 weeks, I do run into a few (way less then 10) occasion that the volume was adjusted "accidentally", all of them are occurred in the middle of congested public traffic. In only one occasion the volume was turn up accidentally, in all other cases, the volume was turn down accidentally. I believe the design of the DAP has come into play here, the volume knob was opened up on the top but covered on the bottom, so the more likely accidental movement will be anti-clockwise, which is turning down the volume. The chance of accidental clockwise movement is significantly less likely.
In all the cases stated above, the volume has increased or decreased by a small margin only, my guess is not more then 3-4 db only. Again this is a designed feature. When you turn the i5 volume knob clockwise by half-cycle, you got 4 db gain, if you want to increase the volume further, you need to release your finger and start from the lower part of the volume knob again to turn it UP (clockwise) again. These is a very unlikely series of movement that you'll encounter accidentally, so something touched the DAP in the backpack and turn up the volume accidentally, it is impossible that the volume knob will turn more then 150 degree, and that's 4 db adjustment at most.
So I can conclude that the i5 volume knob is safe for blind control, it is not bullet proof but it won't create significantly problem even when run into accidents. In extreme condition, you can lock the volume knob at locked screen and that will eliminate accidental control completely.
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