Benny-x
1000+ Head-Fier
I've also been using my D42 with mostly wifi on, but I have a very strong LTE signal here too. I can report that the S3 + D42 is dead silent, at least up to 2pm on the D42 with full volume out of the S3.
I would love to use USB Audio on the Nexus 10 such that I can use it when it is playing music from google play music, or locally through the stock music player (or another good android music player), NOT through USB Audio Recorder Pro.
I have a Nexus 10 and a Verizon Note 2, both stock unrooted, and it's frustrating because the only way I can enjoy USB Audio on those is with USB Audio Recorder Pro. I have two USB DACs, Hifimediy Sabre and Fiio E07k.
Since my Verizon Note 2 is from work, that leaves my Nexus 10 which I could root, unlock, and load a recovery and a ROM (well I have a touchpad with 4.2.2 rom, but I can't even get the device to recognize that a USB audio device is plugged in, but I really want this on my Nexus 10). Is there a ROM right now (or a kernel that I use with the stock ROM) that has full support of USB Audio so any DAC I plug in via USB (With USB OTG cable, of course) will work for any audio coming from the Nexus 10, not just using that USB Audio Recorder Pro app?
Thanks!
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Originally Posted by DonJunker /img/forum/go_quote.gif
I would like the USB hub to supply all power to the DAC.
The cable is not ACA compliant. Samsung uses different resistor values (amongst others) than what is specified in the ACA standards.
It works!!
Received my new soldering station yesterday, and tonight built me a crude but real world usable OTG + charging cable. In addition to the micro usb-b for the S3 and the mini usb-b for a DAC, it has an additional usb-a connector to hook up to an external usb powersource.
This will allow me to play music via external DAC & use satnav while driving my car without draining my phone battery (the music isnt much of a drain, but satnav with the screen at a useful brightness level...)
Once I find some connectors that I like enough I'll make a nicer finished one, or a few, or maybe a few more and sell some...
we are developing an e18 for android phone, but after samsung released S4, we found there are one interesting thing that our E17 can supported android 4.2 but can't supported 4.1 .
at the same time, our E07k can supported 4.1 but not 4.2. I am wondering anyone have the same problem? or known what is the difference between 4.2 and 4.1 in the usb driver
in the phone.
we are developing an e18 for android phone, but after samsung released S4, we found there are one interesting thing that our E17 can supported android 4.2 but can't supported 4.1 .
Another way: the Accessory Charger Adapter way.
An Accessory Charger Adapter (ACA)-compliant Android device operating as a USB host is also able to charge at the same time.
It draws power from an external battery, or from an ACA-compliant USB DAC.
ACA is described in the USB Battery Charging 1.2 specification.
The ACA software program is present in the Linux kernel source code of the Samsung Galaxy S3.
https://github.com/sgs3/GT-I9300_Kernel/blob/master/arch/arm/mach-exynos/p10-battery.c#L248
A USB OTG device is configured to USB host mode supplying or drawing power, or USB peripheral mode by ACA/OTG software/hardware measuring the value of the ID resistance of the USB interface.
According to the value of the ID resistance
. the Android device should act as a USB host, interwork with the USB DAC acting as a USB peripheral, and supply power to the bus-powered USB DAC
. the Android device should act as a standalone USB peripheral, and draw power from an external battery
. the Android device should act as a USB peripheral, interwork with a USB host, and draw power from an external power source
. the Android device should act as a USB host, interwork with the USB DAC acting as a USB peripheral, and draw power from an external battery or another external power supply.
Interesting!
As far as I understand, the FiiO E17 compliancy is as follows:
Samsung Galaxy S3’s native USB Audio ≤ 4.1: no
Samsung Galaxy S3’s native USB Audio 4.2: yes
Samsung Galaxy S4’s native USB Audio (4.2): yes
Other flagship phones
Sony Xperia Z’s native USB Audio: yes
HTC One’s native USB Audio: yes
LG Optimus PRO’s native USB Audio: yes
Another USB Audio: USB Audio Recorder PRO
4.1 / 4.2-powered Samsung Galaxy S3’s USB Audio Recorder PRO: yes
Samsung Galaxy S4’s USB Audio Recorder PRO: yes
Sony Xperia Z’s USB Audio Recorder PRO: yes
HTC One’s USB Audio Recorder PRO: yes
LG Optimus PRO’s USB Audio Recorder PRO: yes