Good idea, unfortunately totally disregard the reality

For smartphone operating:
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On my Samsung Galaxy Note 4 (stock Android 5.0.1) does not play music through USB. The device is recognized at the note, but there is no sound.
The annoying time charging my smartphone I do not want to mention only. Suffice to: On my Samsung Galaxy Tab S (10 ") holds the E5 battery by not just long, because he also tries to load my Tablet.
Good, I thought, then is precisely transmitted by BT. This works but unfortunately only so long well until the first sources of interference occur. Then there are nasty clicks and disconnections. Getting around the city so there's also no music by BT.
That leaves only the Line In of the E5 smartphone. Good, because I have to no 200, - Buy DAC, it actually does a cheaper headphone amplifier or low-headphones.

Now for the operation on the PC:
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Neither of my Win PC 8.1, still on my Win 8.1 Laptop (with the original installation of the manufacturer) does a BT operation.
Line In times interest me at all here, so therefore remains only USB. Since the latest update of Creative software, although I could still hear music (both "normal" and "bit"), but unfortunately are the E5 an extreme time crunch / noise as soon as the song is changed and / or set to pause is.

General:
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-> I have on all devices (also Note 4) a 60 - tested DAC. this runs smoothly on all devices.
-> Now the FIIO KUNLUN E18 HEADPHONE GAIN is. ANDROID ordered. Except BT can probably about the same and costs 20, - less. Let's see ...