[DanBa]

Quote:

I'm sure this has been asked here before but I can't find a definitive answer either on here or online. 
 
I have a galaxy s4 and I am going to be connecting via some type of cable to something like an RSA intruder. My question is what do I set in the galaxy S4 to tell it to send the bit level audio out of the usb port? Is it something in the settings?

 
Just plug and play, because it’s USB!
http://en.wikipedia.org/wiki/Plug_and_play
 
Plug and play, if everything is compliant with the USB specification.
 
The designers of the Galaxy S4 and the RSA Intruder have the same understanding of the USB specification: Galaxy S4 and Intruder can interwork.
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/2835
 
USB is a master-slave communication bus: the master or computer is a USB host, the slave or peripheral is a USB peripheral.
The Galaxy S4 is dual-role USB device, sometimes a USB host, sometimes a USB peripheral.
In order to interact with a USB peripheral like the RSA Intruder, the Galaxy S4 should be switched to USB host mode.
It’s the case when a functional Micro-A USB plug (i.e. pin 4 connected to pin 5) is inserted into the Micro USB receptacle of the Galaxy S4. 
 
Such a Micro USB plug is one of the two ends of a so-called USB OTG cable adapter (i.e. functional Micro-A USB plug to Standard-A receptacle cable adapter).
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=USB%20OTG%20cable%20adapter%20
 
Galaxy S4 > digital USB audio out >> USB OTG cable adapter + regular USB cable provided by RSA >> RSA Intruder >> headphones
 
Such a Micro USB plug is one of the two ends of a so-called USB OTG cable provided by USB cable makers.
http://www.headfoneshop.com/eshop/index.php?route=product/product&product_id=139
http://www.head-fi.org/t/661441/forza-audioworks-the-appreciation-thread
 
Galaxy S4 > digital USB audio out >> Micro USB plug to Mini USB plug USB OTG cable >> RSA Intruder >> headphones

 

[rmilewsk]

Thanks, So I don't need to set anything in the options of the galaxy s4? I just need to connect all of these cables and everythng works perfectly?

 

[Poimandres]

That is correct. You dont have to change any settings. Audio output mode doesnt need to be checked, it even works with power saving mode enabled.

 

[rmilewsk]

I bought a T&S Electronics Micro USB OTG Host cable and an audioquest dragonfly. I hooked up the OTG cable to the galaxy s4, the dragonfly to the OTG and my shure 530's to the dragonfly. I played back a song using poweramp and I don't hear anything. What am I doing wrong?

 

[DanBa]

As far as I know, for the time being the AudioQuest DragronFly can only work with a Galaxy S4 using the USB Audio Recorder PRO app available on the Google Play store.
https://play.google.com/store/apps/details?id=com.extreamsd.usbaudiorecorderpro
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/2910
 
For the time being, Samsung and AudioQuest developers don't have the same understanding of some part of the USB specification.
http://developer.samsung.com/forum/board/thread/view.do?boardName=GeneralB&messageId=227582&startId=zzzzz~

 

[rmilewsk]

Thanks for all of the help. I bought USB audio recorder pro and am able to play back flac files using the AQ dragonfly. A couple of questions.
 
1. How the heck do I control the volume? I don't see any volume controls in the application and the phone volume doesn't do anything.
 
2. Can USB audio recorder pro be set to continue playback when the phone display is shut off? Every time I shut it off the AQ dragonfly looks like it is deinitialized. 

 

[tone]

Well unfortunately my samsung galaxy s4 doesn't work with my hrt microstreamer at all. I haven't tried the s4 with the usb audio player pro though (which doesn't help me with spotify). Its so weird since my galaxy s3 worked great with the microstreamer (both nuetron player + spotify worked just fine with the s3!).

 

[rmilewsk]

By the way the Galaxy S4 > OTG cable > AQ Dragonfly > shure 530's sounds INCREDIBLE!. And I have the JH Audio 13 pro's coming. Listening to Paul Simon's Graceland "Diamonds on the soles of her shoes"

 

[DanBa]

Quote:

Thanks for all of the help. I bought USB audio recorder pro and am able to play back flac files using the AQ dragonfly. A couple of questions.
 
1. How the heck do I control the volume? I don't see any volume controls in the application and the phone volume doesn't do anything.

 
You can use the volume control of the mixer tab to adjust the volume of the DragonFly.
 

 
 

2. Can USB audio recorder pro be set to continue playback when the phone display is shut off? Every time I shut it off the AQ dragonfly looks like it is deinitialized. 
 

 
I’m used to listen music on my Galaxy S3 + ODAC using USB Audio Recorder PRO in shuffle mode while reading ebook.
 
1. USB Audio Recorder PRO in shuffle mode
2. Click on the Home key
3. Launch eReader app, or launch any other app, or screen timeout

 

[scrypt]

My HiFimeDIY Sabre DAC with micro USB just arrived and it works with absolutely everything on my S4 -- Neutron, USB AR Pro, even the stock player.  No need to use an OTG cable, as it's built in.
 
http://hifimediy.com/index.php?route=product/product&path=62&product_id=124

In portable usage, this DAC looks like an adapter attached to my S4 and nothing else. It also sounds quite good. The volume keys of the S4 control the volume of the DAC even without an amp (though of course an amp is needed to power one's head/earphones regardless of volume). 

 

[rmilewsk]

Thanks. I did find that mixer tab for the volume. It seems as though the precision of the volume control with my setup leaves much to be desired. The tiniest changes result it huge volume swings. It's almost impossible to get a good volume because i can't use my finger to move the bar in small enough increments. Has anyone else found a solution for this?

 

[rmilewsk]

That looks very close to what the OTG cable > AQ dragonfly looks like. They have combined them into one unit.

 

[DanBa]

Quote:

Thanks. I did find that mixer tab for the volume. It seems as though the precision of the volume control with my setup leaves much to be desired. The tiniest changes result it huge volume swings. It's almost impossible to get a good volume because i can't use my finger to move the bar in small enough increments. Has anyone else found a solution for this?

 
As the developer of USB Audio Recorder PRO frequently chimes in on the following thread
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/2940
you could post your fine tune volume control requirement there.

 

[NBAJ2K]

I bought a UCA202,powered OTG, Micro USB car charger and 3.5mm to 2 RCA and received them in the mail yesterday was all excited to try this on my Galaxy S4. I checked 'audio output' mode under 'Accessory' and tried to play some of the music on my phone. For some reason the any audio file does not play. (I'm using the stock S4 Rom).

I get the error ' Couldn't play the track you requested' when trying to play a file in Google Music, and when trying to play any file in PowerAmp, it stays on 0:00 and never starts. I even tried the same with YouTube and videos don't even play until I unplug it. As soon as I unplug the OTG, everything plays fine out of the phone speaker.

This is definitely frustrating. Does anyone possibly have any suggestions how I could get this working with my Galaxy S4? Now that I have everything, I'm not sure what else to try, unless somehow the OTG I bought from Amazon is faulty.

The phone it looks like doesn't charge with it since the cable doesnt seem to go in all the way. I figured that this shouldn't matter though and that even without the car charger plugged in it should still work

Any thoughts would be greatly appreciated.

-J

 

[mhoram]

I am not an expert, but I have seen something similar before. First, you don't have to check audio output. I didn't and mine works. YMMV. 
I have Poweramp and I have seen this before. It means that the file itself is not playable, or it is not in the right place, or something. In other words, it is an issue with Poweramp. If I find the emails I got from the developer I will let you know exactly what I found out. The fact that it works when you unplug the OTG makes me think that it is not Poweramp, though. I think your OTG cable is defective. I ran into a similar problem, and I bought two new ones and both work fine, and the first one does not work. The first one is a model and brand that works for other people, so I think my first one was defective. They make millions of these as cheap as they can and re-brand them, so there is a certain amount of defective units. Also, you might get a new one that is not powered. I have had a problem when I plug my OTG cable in, if my S4 sees a load on it, it will not play anything until I unplug it and re-pug it in. This may not be helpful, but you can see there are a number of issues possible.