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Android phones and USB DACs - Page 46

post #676 of 4555
Quote:
Originally Posted by gikigill View Post

Add a cross against the iBasso DB2.

 

Tried different ROM,s and kernels but no luck at all. Waiting for a fix if possible.
 

danba is probably gonna ask you for some logs to see whats cooking.

post #677 of 4555
Quote:
Originally Posted by DanBa View Post

Weird!
The Galaxy S3 can interwork with an ODAC using the same Tenor TE7022 USB controller and the same ESS Sabre ES9023 conversion chip.


Are you sure of your OTG USB cable? You could use a USB mouse to test it.
Does the HifiMeDiy Sabre USB DAC require too much power? You could use a powered USB hub to provide the required power for the HifiMeDiy Sabre USB DAC.
Could you replace the modded software by the stock software just for HifiMeDiy Sabre USB DAC interworking test purpose?
Could you provide a dmesg output? It should be interesting for Samsung developers to know what is going on between the Galaxy S3 and the HifiMeDiy Sabre USB DAC at the Linux kernel level.


 

Promised DanBa to do some stuff

 

Otg cable works with usb-drive and usb-stick

Didnt try a powered hub yet    ( any ideas on where to buy a nice tiny powered hub?)
reverted back to stock rom and kernell

Still no sound :(

the dmesg output can be downloaded here : https://www.dropbox.com/s/o4jzevl1r9neo6k/d.txt

 

 

Steef

post #678 of 4555
The host, Galaxy S3, successfully reads the configuration information from the USB device, USB DAC:
 
<6>[ 1230.889332] c0 usb 2-1: New USB device found, idVendor=1852, idProduct=7022
<6>[ 1230.889369] c0 usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
<6>[ 1230.889406] c0 usb 2-1: Product: HiFimeDIY DAC
<6>[ 1230.889431] c0 usb 2-1: Manufacturer: HiFimeDIY Audio 
<7>[ 1230.890699] c0 usb 2-1: configuration #1 chosen from 1 choice
<6>[ 1230.908584] c0 input: HiFimeDIY Audio  HiFimeDIY DAC as /devices/platform/s5p-ohci/usb2/2-1/2-1:1.0/input/input11
 
"Based on the configuration information and how the USB device will be used, the host assigns a
configuration value to the device. The device is now in the Configured state and all of the endpoints in
this configuration have taken on their described characteristics. The USB device may now draw the
amount of VBUS power described in its descriptor for the selected configuration."
 
But likely, the USB DAC should not have the required power from the Galaxy S3 and have some problem:
 
<7>[ 1248.056855] c1 hub 2-0:1.0: state 7 ports 3 chg 0000 evt 0002
<7>[ 1248.057011] c1 s5p-ohci s5p-ohci: GetStatus roothub.portstatus [0] = 0x00030100 PESC CSC PPS
<7>[ 1248.057189] c1 hub 2-0:1.0: port 1, status 0100, change 0003, 12 Mb/s
<6>[ 1248.057348] c1 usb 2-1: USB disconnect, device number 2 by hub_thread+0x428/0x1478
 
#define RH_PS_PPS            0x00000100  /* port power status */
#define RH_PS_CSC            0x00010000  /* connect status change */
#define RH_PS_PESC           0x00020000  /* port enable status change */
 
The full speed OHCI driver of the Galaxy S3 detects the USB DAC connect status change, and the Galaxy S3 decides to disconnect.
 
 
Possible workaround: use the high speed EHCI driver of the Galaxy S3 by using a powered USB 2.0 hub like the tiny Belkin 4-Port Hi-Speed USB 2.0 Mobile Hub
 

 

1000

 

 
1. we won’t have the same full speed OHCI driver error because the high speed EHCI driver is involved with the USB 2.0 hub.
 
2. the USB DAC won’t have the power issue because it drains power from the powered USB hub.
 
 
The Belkin 4-Port Hi-Speed USB 2.0 Mobile Hub can be powered by the mains, or by a tiny battery on the go.
In the latter case, it could improve the sound quality because it provides a clean 5V.

Edited by DanBa - 10/30/12 at 1:01pm
post #679 of 4555

Tnx Danba!

 

Hope your work will help make Google & Android device manufacturers to enable standard USB audio!

 

i'll try a usb hub.

You mention "or a tiny battery on the go" ....what kind and how do i connect that battery to the belkin hub?

 

 

Steef
 

post #680 of 4555

Hi DanBa,

 

How do I generate a log for the Galaxy S3 usiing the iBasso DB2?

 

I shall send it to you asap.

post #681 of 4555
You could download the free Android Terminal Emulator from Google Play:
 
then:
 
 . Open the Terminal Emulator and type
dmesg > /sdcard/f [do not click “Enter”]
 
. Connect your S3 to the iBasso DB2 via a USB OTG cable
 
. On the Terminal Emulator, click “Enter”
 
[that should get you a dmesg log file "f" in the sdcard folder.]
 
 
About dmesg:
 
A dmesg output:
post #682 of 4555
Quote:
Originally Posted by stevenstefke View Post

i'll try a usb hub.

You mention "or a tiny battery on the go" ....what kind and how do i connect that battery to the belkin hub?

 

 

The 110v/220v AC to 5v DC power adapter provided in the box by the powered USB hub manufacturer

 

 

 

can be replaced by

 

 

 

 

 

USB battery packs:

http://www.head-fi.org/t/620179/usb-battery-packs

post #683 of 4555
Received my OTG cable for my Samsung S3 today and was able to play music with the UD100 DAC on my first try biggrin.gif and it sounded very good with the O2. I also tried my Centrance DACmini (desktop DAC/Amp) but could not get any sound out using Poweramp. I can hear the relay when I connect the S3 but no go. I also tried my DACport with a powered USB hub but again no sound.

I will download the emulator that Danba mentioned and will post the log back later. Cheers!

Edit:

Here the log output for DACmini
http://db.tt/BCvWD5lw
Edited by Twinster - 10/30/12 at 5:49pm
post #684 of 4555

Curious.. what is OTG?

post #685 of 4555

To Quote The Wiki:

USB On-The-Go, often abbreviated USB OTG, is a specification that allows USB devices such as digital audio players or mobile phones to act as a host, allowing other USB devices like a USB flash drive, mouse, or keyboard to be attached to them. Unlike conventional USB systems, USB OTG systems can drop the hosting role and act as normal USB devices when attached to another host. This can be used to allow a mobile phone to act as host for a flash drive and read its contents, downloading music for instance, but then act as a flash drive when plugged into a host computer and allow the host to read off the new content.

beerchug.gif

post #686 of 4555

I have to give credit to everyone for trying and taking the time to post back and give danba the logs, 

 

It speaks wonders about us as a community.

post #687 of 4555

Sorry if this is a bit off-topic, but is there any fundamental reason why there is no third party software that could turn an iPhone (maybe jailbroken? maybe with a camera connector kit?) into a digital source for a USB DAC?

post #688 of 4555
Quote:
Originally Posted by DanBa View Post

 

The 110v/220v AC to 5v DC power adapter provided in the box by the powered USB hub manufacturer

 

 

 

can be replaced by

 

 

 

 

 

USB battery packs:

http://www.head-fi.org/t/620179/usb-battery-packs

Super! Thank you DanBa

post #689 of 4555
Quote:
Originally Posted by TrollDragon View Post

To Quote The Wiki:

beerchug.gif


 

Thank you !

 

Subbed to this thread now... this'll probably what will be able to get me off of the iphone 4s

post #690 of 4555
Me too, will be using a Galaxy Tab 2 7" though. Keeping my Nokia music phone and iPod classic/Nano/Mini and ditching iOS completely.
Edited by grokit - 10/31/12 at 2:01pm
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