[xXSjnHassanXx]

Want to share with u guys
 
galaxy siii can connect whatever things connected at it. in this video he even connect it to fiio e7 via usb
 
cool
 
http://blog.gsmarena.com/samsung-galaxy-s-iii-can-connect-to-anything-demonstrates-it-on-video/

 

[nnotis]

According to Android sound guru Supercurio, the S3 kernel has USB driver support.  But those who've tested it have found it not to be implemented.  This video is encouraging, but I'll believe it when someone confirms it to be working.
 
Can any S3 owner confirm?

 

[KT66]

I thought all the Galaxy users were getting excited because of its Wolfson DAC? so why output to something entry level like an E7?
 
surely a fixed voltage line out would be better?

 

[nnotis]

KT66, The S3 has a nice DAC for a cellphone.
 
But it'll sound like 2 dimensional slop compared to a high end DAC/amp combo.  Getting the digital signal out of the phone in a USB audio format allows one to use any number of these devices.
 
This functionality would blow open the door to uncompromised portable audio.  That's going to be of interest to a lot of people here.

 

[KT66]

Quote:

KT66, The S3 has a nice DAC for a cellphone.
 
But it'll sound like 2 dimensional slop compared to a high end DAC/amp combo.  Getting the digital signal out of the phone in a USB audio format allows one to use any number of these devices.
 
This functionality would blow open the door to uncompromised portable audio.  That's going to be of interest to a lot of people here.

agreed, but surely the E7 would be a step down in DAC?.
 
I use an E7 with my Nokia N8 OTG usb,( I can't find anything else portable that works),
and I would say that it's a change in sound, compared to the N8 on its own, rather than an improvement.

 

[a_tumiwa]

actually u dont need to create a new thread....
all the information is already available here:
 
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs-how-to-increase-the-issues-priority-with-google/60

 

[NZtechfreak]

It's also confirmed here: http://www.head-fi.org/t/608535/wolfson-dac-confirmed-for-galaxy-s3/375
 
My video BTW, I've confirmed it as have several others now (including an even earlier video showing it with a Topping TP30 on YouTube). I was the first to try USB Audio with the S3 with my E17 and it didn't work, but then I got an E7 and it works, and several other devices now confirmed working.
 
To my ear sound improved by a fair margin with the E7 to be honest, awaiting Voodoo Sound to see what Supercurio can bring to the table.

 

[nnotis]

Fantastic news!
 
So, it's now time to start compiling a list of what USB DACs do work with it.  Anyone have a Pico to try, or perhaps one of the offerings from iBasso?

 

[t0tor0]

hey guys,
 
i saw this video and got a USB OTG cable. For exact DAC part, see 6:49 onwards
 

 
Managed to check out some DAC recently. Some DAC/AMP doesn't seems to work. I don't understand why. If someone knows why, please enlighten!!!
 
I managed to tried some that do work. Below is a list. Hope others can add on here!!!
 
Works:
 
1) iBasso D12, D5
2) RSA "Predator"
3) Ordnance .25 Amp
4) Fiio E7 (as in video)
5) Go Vibe Mini USB DAC
 
Does not work:
 
1) Go Vibe Porta Tubes USB/AMP
2) Go Vibe Vest+ Portable Amp with 24/96 DAC
3) PICO
4) Centrance DACport LX 24/96 USB DAC
5) Fostex HP-A8C

 

[firev1]

Quote:

hey guys,
 
i saw this video and got a USB OTG cable. For exact DAC part, see 6:49 onwards
 
 
 
Managed to check out some DAC recently. Some DAC/AMP doesn't seems to work. I don't understand why. If someone knows why, please enlighten!!!
 
I managed to tried some that do work. Below is a list. Hope others can add on here!!!
 
Works:
 
1) iBasso D12, D5
2) RSA "Predator"
3) Ordnance .22 Amp
4) Fiio E7 (as in video)
5) Go Vibe Mini USB DAC
 
Does not work:
 
1) Go Vibe Porta Tubes USB/AMP
2) Go Vibe Vest+ Portable Amp with 24/96 DAC
3) PICO
4) Centrance DACport LX 24/96 USB DAC

I know the DACport's operation is to do a handshake for extra power from the bus. As the rest, it may be the current draw is way too high? If so, just adding a battery pack with a usb hub may do the trick. EDIT: Nvm it did not work either way.  I wonder if anyone can try it with a Benchmark DAC1? Since it works with Ipad as well.

 

[t0tor0]

Quote:

...just adding a battery pack with a usb hub may do the trick...

 
tried that too from a main power source but didn't work...

 

[DanBa]

Quote:

Managed to check out some DAC recently. Some DAC/AMP doesn't seems to work. I don't understand why. If someone knows why, please enlighten!!!
 
I managed to tried some that do work. Below is a list. Hope others can add on here!!!
 
Works:
 
1) iBasso D12, D5
2) RSA "Predator"
3) Ordnance .22 Amp
4) Fiio E7 (as in video)
5) Go Vibe Mini USB DAC
 
Does not work:
 
1) Go Vibe Porta Tubes USB/AMP
2) Go Vibe Vest+ Portable Amp with 24/96 DAC
3) PICO
4) Centrance DACport LX 24/96 USB DAC

 
 
Dmesg log output and lsusb log output could detail what is going on.
http://comments.gmane.org/gmane.linux.alsa.devel/96433
 
dmesg:
https://play.google.com/store/search?q=dmesg
 
lsusb:
https://play.google.com/store/search?q=lsusb
 
 
However for the moment all USB DAC with known USB controller, which interwork with Samsung Galaxy S III, contain a Full-Speed transceiver:
. AMB Labs Gamma2 with USB controller TI Burr-Brown PCM2707
. FiiO E7 with USB controller TI Burr-Brown PCM2706
. Go-Vibe Mini USB DAC with USB controller TI Burr-Brown PCM2702
. HifiMan Express with USB controller TI Burr-Brown PCM2702
. iBasso D12 with USB controller TI Burr-Brown PCM2906B
. Topping TP30 with USB controller TI Burr-Brown PCM2704
 
The following USB DAC with known USB controller, which don’t interwork with Samsung Galaxy S III for the time being, are:
. FiiO E17 with USB controller Tenor TE7022 (FiiO E17 does work with Android-powered Archos G9)
. iBasso D6 with USB controller TI TAS1020B
. Grant Fidelity TubeDAC-11 with USB controller Tenor TE7022
 
 
 
Samsung Galaxy S III Full-Speed / High-Speed switching issue?
http://www.gfec.com.tw/TE7022L
http://www.ti.com/lit/ds/symlink/pcm2706.pdf
 

 
 
SGS3 USB driver issue?: some parameters are not well-adjusted?
 

 
"The host controller directs traffic flow to devices, so no USB device can transfer any data on the bus without an explicit request from the host controller. In USB 2.0, the host controller polls the bus for traffic, usually in a round-robin fashion. The throughput of each USB port is determined by the slower speed of either the USB port or the USB device connected to the port."
http://en.wikipedia.org/wiki/Universal_Serial_Bus
 
 
Powered USB 2.0 hub containing Full-Speed and High-Speed transceiver workaround?
http://www.ti.com/analog/docs/microsite.tsp?sectionId=590&tabId=2211&micrositeId=11
 

 
"High-speed USB 2.0 hubs contain devices called transaction translators that convert between high-speed USB 2.0 buses and full and low speed buses. When a high-speed USB 2.0 hub is plugged into a high-speed USB host or hub, it will operate in high-speed mode. The USB hub will then either use one transaction translator per hub to create a full/low-speed bus that is routed to all full and low speed devices on the hub, or will use one transaction translator per port to create an isolated full/low-speed bus per port on the hub."

 

[t0tor0]

Thanks for the info. Very technical! But I guess a safe bet is that the Burr-Brown series DACs seems to work well.
 
Is the ability of using a external DAC via USB OTG limited only to S3 or can all Android running on ICS works? eg HTC one X?

 

[DanBa]

Quote:

Samsung Galaxy S III Full-Speed / High-Speed switching issue?
http://www.gfec.com.tw/TE7022L
http://www.ti.com/lit/ds/symlink/pcm2706.pdf
 

 

 
 
My theory of  SGS3 Full-Speed / High-Speed switching issue is wrong. 
The SGS3 interworks with the USB DAC "ODAC" using the USB controller Tenor TE7022.
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs-how-to-increase-the-issues-priority-with-google/60#post_8468969
 
 
Quote:

Is the ability of using a external DAC via USB OTG limited only to S3 or can all Android running on ICS works? eg HTC one X?

 
 
Every USB host-capable Android smartphone should be able to interwork with an external USB DAC.
 
A USB host-capable Android smartphone interacts with USB devices, like USB mass storage devices, through the USB host controller, a hardware component.
And the USB audio software modules just manage another USB flow of data exchanged between USB host and USB device.
 
Android relies on Linux for core system services such as driver model. The Linux kernel acts as an abstraction layer between the hardware and the rest of the software stack.
 

 
Android USB audio software or Advanced Linux Sound Architecture or ALSA is a Linux kernel component.
http://thewelltemperedcomputer.com/Linux/AudioArchitecture.htm
 

 
Android 4.0 Ice Cream Sandwich includes the ALSA source code which can be compliant with USB audio class 2 devices allowing for 24 bits / 192 kHz:
https://bitbucket.org/paulobrien/android_kernel_galaxynexus/src/bc4f9b72a51d/sound/usb/card.c
"android_kernel_galaxynexus / sound / usb / card.c: "USB Audio Driver for ALSA"
 
The USB audio is enabled on the Ainol Novo 7 Advanced tablet:
http://www.slatedroid.com/topic/29289-usb-audio-cards-support-drivers-and-libs/
 
"We just need 3 base things: 
1st: USB Host support in Android kernel. 
2nd. USB audio driver, in kernel, or compiled as a module. 
3rd. Some logic to switch to USB audio card, or back to internal one."

 

[Info]

It is possible that Samsung Galaxy S III OTG only support 16bit/48KHz USB DAC?

PCM270x is 16bit/48KHz
TE7022L and TAS1020B is 24bit/96KHz