Android phones and USB DACs - Page 66

Quote:

Originally Posted by hampox 

Hello,

I would need to know if there is the possibility to connect a USB DAC via an OTG cable to the Galaxy Tab2?

It works with the Samsung Galaxy S3 so I assume that it should work with the Galaxy Tab2 also?

Furthermore I would like to know if the Voodoo Sound mod will support the Galaxy Tab2 and its Wolfson WM1811?

If so, did supercurio announced a release date already?

no one?

Upcoming V-Moda Vamp Verza USB DAC/amp:

http://www.facebook.com/VMODA.HK

Samsung Galaxy S3 / Note 2 > digital USB audio out >> "USB OTG" cable >> V-Moda Vamp Verza >> headphones

http://www.head-fi.org/t/603052/v-moda-vamp-development-reviews-pics-etc/435#post_8562310

Quote:

Originally Posted by silverback61 

Dan,

 

Is that a one cable solution for GS3 to fiio? If so, could you direct me to a retailer? Sorry if I missed this earlier in the thread.

 

Thanks

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/840#post_8869008

Samsung Galaxy Note 10.1 & USB audio:

http://forum.lowyat.net/index.php?showtopic=2452730&view=findpost&p=56402502

Galaxy Note 10.1 > digital USB audio out >> "USB OTG" cable >> Stoner Acoustics UD100 USB DAC >> cMoyBB amp >> headphones

I like this minty fresh solution better than the V-Moda at $500----huh? Kryptonite in there?

Yes, Apple authentication coprocessor in there!

The Apple authentication coprocessor imposed in every iDevice-compliant USB DAC won't improve the sound quality of the DAC, but it's certainly the root cause of the higher price. 

Apptonite

Topping D1 Mark 2 review:

http://translate.google.fr/translate?hl=fr&sl=es&tl=en&u=http%3A%2F%2Foldnewsound.blogspot.com%2F2012%2F11%2Ftopping-d1-mark-ii.html

http://www.head-fi.org/t/636606/topping-d1-mark-2-review

stock Galaxy S III > digital USB audio out >> "USB OTG" cable >> Topping D1 Mark 2 USB DAC/amp >> headphones

Quote:

Originally Posted by liviococcia 

Sorry to bump in, but I've been reading through this thread, it's just regarding the issue of power to a Galaxy Note2 while using a portable DAC.
I seen the OTG host adapter + power plug wiring diagrams using a 124komh to allow charging while in host mode, but has anyone made this adapter using that resistance, and does it working on there Galaxy Note 2?
Regards

"The $43 Galaxy S3 + Car Stereo Upgrade for WAaaY better sound quality" by CZ Eddie:

http://www.head-fi.org/t/639883/the-43-galaxy-s3-car-stereo-upgrade-for-waaay-better-sound-quality

Galaxy S3 > digital USB audio out >> "USB OTG" cable >> Behringer UCA202 USB DAC >> car stereo amp >> car stereo speakers

"...

Here is the DAC and the USB-OTG cable:

This is what the three connectors on the USB-OTG cable look like:

Here is the USB-OTG cable with my iBOLT dock:

And here is the finished product. My S3 docked, charging and outputing beautiful digital music!

..."

Quote:

Originally Posted by bmichels 

Gentlemen, i am VERY Sorry, but thé more i read this thread the more i am confused about "How to mofify the S3 or Note2 into à device capable of passing Native 24/192 kHz to an external DAC".
So (assumons i get à compatible DAC) could someone direct me to a "step by step" Way to modify what is necessary ( firmware, kernel ???) to make it happend ?
Tanks in advance

I’m not a developer. I don’t have access to the latest source code of the S3 / Note2.

The following is what I find on Internet.

At the Linux Kernel Space, the ALSA Kernel Driver of the Galaxy S3 / Note2 is able to drive USB Audio Class 2 (UAC2) devices (i.e. USB DAC playing up to 32/384).

https://github.com/sgs3/GT-I9300_Kernel/blob/master/sound/usb/card.c#L246

At the Linux User Space, the AudioFlinger should be modified.

It should be able to openOutputSream PCM_16_BIT and PCM_24_BIT.

The mixer "AudioFlinger" don’t have to be perfect when mixing PCM_24_BIT music files and phone call/data audio notifications.

http://gitorious.org/android-eeepc/base/blobs/08defa03546578b8c71a26668de8ff8feed727fd/libs/audioflinger/AudioFlinger.cpp#line122

http://www.fpsece.net/forum2/viewtopic.php?f=38&t=2034&start=4830

http://svn.gna.org/svn/warmux/trunk/build/lib/sdl/src/audio/android/SDL_androidaudio.c

At the Linux User Space, the Simple DirectMedia Layer SDL_androidaudio.c should be modified.

It should be able to deal with AUDIO_S8, AUDIO_S16 and AUDIO_S24.

And finally, a MediaPlayer app should be able to deal with AUDIO_S24.

There should be other limitations that Android developers could easily remove.

Quote:

Originally Posted by liviococcia 

Thanks Danba, there's seems no way for me to purchase that adapter in the UK, or get it sent to the UK, I can't find a 'Y' adapter like that anywhere, so I couldn't even try it out and report back to the thread.

How about the following seller?

http://www.ebay.com/itm/Micro-USB-Host-OTG-Cable-W-Micro-USB-power-Samsung-i9100-i9300-i9220-N7100-/130815045315?_trksid=p2047675.m1850&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D11%26meid%3D4037685154089963145%26pid%3D100011%26prg%3D1005%26rk%3D3%26sd%3D110931117836%26

Quote:

Originally Posted by liviococcia 

The other points I don't understand and that concern me are, most posts indicate that if I tried to make something I need to use a resistor Short between pins 4 & 5, so the fact that your 'Y' adapter works allowing the audio data to go to the DAC(host mode), and charging voltage/current to run back seems to suggest there's more to your'Y'adapter, is it possible that this resistor is built into the adapter? or that actually no resistance is necessary and that it's incorrect information with regards to Galaxy S3's or Note 2's? again nothings clear or definite.

 

USB specification:

 

 

http://193.219.66.80/datasheets/usb_20/Micro-USB_final/Micro-USB_1_01.pdf

 

"The ID pin on a Micro-B plug is not connected or is connected to ground by a resistance of greater than Rb_PLUG_ID (100kΩ MIN)."

Other put, if the resistance is lesser than 100 kΩ, it’s a Micro-A plug and the S3 / Note2 acts as a USB host able to interwork with a standard USB DAC.

 

 

"To inform the PD [Portable Device] that it should act as host and draw current, the ACA [Accessory Charger Adapter] is required to pull the ID pin to ground through a resistance of RID_A (124k)."

http://kinetis.pl/sites/default/files/BC1.2_FINAL.pdf

 

 

Quote:

Originally Posted by liviococcia 

I have not read a single thread on any android, or smartphone audio forums specifically indicating that someone has made an adapter that will definitely function with a Samsung Galaxy Note 2 (international), giving specific details on a SNote 2's resistance requirement.

 

So far, like the quad-core Exynos powered Galaxy S III, the new quad-core Exynos powered Samsung Galaxy Note II can work with the FiiO E7, the iBasso D12, Leckerton UHA-6S MKII, the ODAC and … ; has some issue with the HeadAmp Pico; and doesn’t work with the FiiO E17.

So, in regard to the USB protocol, the behaviour of the Galaxy Note II is likely identical to the behaviour of the Galaxy S III.

Quote:

Originally Posted by liviococcia 

Also what seems odd, is that no cable makers, or sellers in the UK, or Europe feel the need to produce a 'Y' adapter to sell on the open market, but that China and Asia do.

 

May be a lot of dynamic sellers over there.

Quote:

Originally Posted by liviococcia 

Finally, I would hate to damage my phone in some way by making something up that wasn't specifically correct, don't misunderstand me, the instructions are clear on making a microUSB power/host adapter, what's not is that some members on many forums will just buy a suitable adapter item, and It work with no problems, while others having the same hardware and a modded host adapter not work.

You could use an ohmmeter for verification.