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Android phones and USB DACs - Page 204

post #3046 of 5602
Quote:
Originally Posted by SV_huMMer View Post

I wonder if Android mini PC can have UARP installed...

 

It should be able to get USB Audio Recorder PRO installed on an Android mini PC.

 

"The MiniX NEO X7 is a brand new Android TV Box with an extreme powerful Quadcore Processor and 2GB RAM. The newest Android Version 4.2 and the Google Play Store gives you full access to all your favorite apps."

http://www.minix-europe.com/MiniX-NEO-X7-Android-42-Quad-Core-Smart-TV-Box_1

 

Hopefully, the FiiO E07K will be tested with the Minix Neo X7 Android mini PC using USB Audio Recorder PRO.

http://www.head-fi.org/t/638910/fiio-e07k-andes-review-and-help-thread/945#post_9776498

post #3047 of 5602
Quote:
Originally Posted by SV_huMMer View Post

I wonder if Android mini PC can have UARP installed...

 

It has Android 4.2, so it should be able to have it. Question really is whether UARP works headless. Also, depending on what DAC will be used - and since this will be used at home - there's an optical SPDIF output, so UARP isn't as critical.

post #3048 of 5602
Quote:
Originally Posted by Moolok View Post

I downloaded and installed USB Audio Recorder Pro Trial and tried it with Minix Neo X7 and FiiO E07k.
First try was disaster: the X7 crash & froze. I had to eventually reflash the ROM.
The second try was great success: I can inform you that UARP works with E07k. I tried both mini-USB OTG cable on mini-USB port and normal USB cable on regular port. Both ways worked equally good. I played some FLAC files as long as trial let me.
Oh, and UARP worked with my unrooted (older model) Nexus 7 and E07k through mini-USB OTG cable.

Sent from my Nexus 4 using Tapatalk 4
 
post #3049 of 5602

From Hands on with the Onyx e-Ink Android phone:

 

onyx eink phone

Onyx intends on releasing the first fully featured e ink phone in the 3rd quarter of 2013. We got our hands on the final hardware model of this new phone and the only thing that will change is the firmware. One of the big hyping factors behind this is the front-lit display, much akin to the Amazon Kindle Paperwhite and the one week battery life.

The Onyx e Ink phone takes e-Paper out of the e-Reader world and transplants it in the very competitive smartphone arena. It features a 4.2 inch screen, running on Android 2.3 operating system. The resolution is 480×800 and is powered by a 1 GHZ CPU processor. Battery life should last you around one week, the device we had was being constantly fondled for the last 36 hours and was still at 90%.

Sure, it has Android 2.3, but if it could be rooted, the battery life sure looks attractive.

Not sure whether a smartphone screen drains more battery than hi-res music playback though.

post #3050 of 5602
Quote:

Originally Posted by hoichi View Post

 

Sure, it has Android 2.3, but if it could be rooted, the battery life sure looks attractive.

Not sure whether a smartphone screen drains more battery than hi-res music playback though.

 

Good question. I highly doubt hi-res music playback could ever drain as much battery as the screen but I could be wrong. Smartphone processors are quite powerful these days and it really doesn't take a whole lot of processing power even to decode 24bit/192khz. I think with most devices, even if the processor is being maxed out, the screen will likely still consume more power unless its turned off. I've only noticed significant battery drain from my processor when both the CPU and GPU are being really taxed, as with some 3D games. As I say though, I could be wrong. It would be interesting to see what kind of battery life different devices get while playing hi-res music.

post #3051 of 5602
Quote:
Originally Posted by Raenmor View Post
 

Downsampling is an android "feature" for compatibility. It resamples every stream to 48/16 to work on every, even the cheapest DACs. It's not kernel related (well, partially), but mainly OS limitation, so bypassing this requires either heavy modifications to android sound logic, especially if you want bit perfect output. There is bunch of audio layers, such as mixer, dsp effects and so on. Global bypass is painful, but can be done relatively easy by using player, that can send pcm stream to alsa directly, but it have to get root privileges, so it will be a system app from manufacturer, if you don't want to mess with your phone rooting it and so on. Afaik iBasso did the same trick with their DX100, and probably LG will take the same approach.

 

There are other ways, but you will either have to root your phone to do it yourself, or wait for google to change their audio logic.

Just want to make sure I understand. I see Danba's photos of the M2TECH HI Face via UARP outputing a 352/32(whatever) signal with a 44/16 input. So is UARP or HiFace upsampling the 44/16 input? My understanding is that upsampling doesn't really improve the sound. Playing at the native resolution recorded is best. What do you think? Thanks, satwilson

post #3052 of 5602

The format and resolution of "Input" are more meant for recording: USB Audio Recorder PRO is mainly a USB recorder, hence the format of USB Input from an eventual microphone is displaying.

 

 

 

 

1000

 

 

 

 

Google Nexus 7, AudioQuest DragonFly and USB Audio Recorder PRO:

http://vaiopocket.seesaa.net/article/353122143.html

 

"DragonFly employs sophisticated Asynchronous USB Audio Data Transfer to dramatically improve every aspect of audio performance. Tremendous amounts of engineering ensure the best possible sound on any type of music files. DragonFly accepts music files ranging from MP3 to full-resolution, standard CD files (16-bit/44kHz). DragonFly will even play your high-resolution 24-bit/96kHz music files! (NOTE: the DragonFly will play files up to 24bit/192k, but it will down-sample them to 24/96). Plus, it has a clever LED indicator that changes color to display the resolution of the incoming signal. (Green=44.1k, Blue=48k, Yellow=88.2k, White=96k or above.)"

 

16/44.1:

 

 

 

24/96:

 

 

 

 

From Cypher Labs:

http://cypherlabs.com/blog/post/android-devices-play-high-resolution-audio-using-the-algorhythm-solo-db

 

 

1000

 

 

 

"Android Devices Play High Resolution Audio Using the AlgoRhythm Solo -dB

 

Tracks of resolutions up to 24/192 now play from Android devices through the AlgoRhythm Solo –dB, at full resolution in asynchronous mode. Simply load tracks, or entire folders of tracks, onto a micro SD card, connect the devices and play tracks using the application "USB Audio Recorder Pro"..."

 

 

 

 

 

USB audio is not yet implemented by Google.

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/2625#post_9614979

 

Actually each Android device manufacturer implements its own USB Audio. 

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/2985#post_9762071

 

The different native USB audio implementations use the Android media player framework which currently has some hi-res limitation instructions (i.e. only 16/44.1).

 

The USB Audio Recorder PRO app available on Google Play store, including a USB audio driver at the Android user space, allows a lot of stock Android devices with or without native USB audio to interwork with a lot of USB DACs.

 

USB Audio Recorder PRO is currently my preferred music player because it can output a very natural sound. I have also Neutron and Poweramp music players.

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/2475#post_9511388

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/1185#post_8989408

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/2475#post_9513867


Edited by DanBa - 9/7/13 at 3:36am
post #3053 of 5602

Any body could point me where could i download free 32bit 384khz audio file to test my M2tech Hiface Dac?

 

Will be highly appreciated. Thanks! 

post #3054 of 5602

I'm unable to get USB Audio Recorder PRO to open with a HiFimeDIY Tiny DAC on my LG Optimus G (AT&T, E970).

 

Do I need a different kernel or what? I'm on stock 4.1.2 (latest for E970).


Edited by z0rz - 9/7/13 at 6:14am
post #3055 of 5602

I think you don’t need a different kernel: just use the stock kernel.

 

I am wondering if you have separately tested the different elements of your setup:

LG Optimus G using USB Audio Recorder PRO >> USB OTG cable adapter >> HiFimeDIY Sabre Tiny USB DAC >> IEM

 

. LG Optimus G in USB host mode and USB OTG cable adapter:

LG Optimus G >> USB OTG cable adapter >> simple USB peripheral like USB mouse or USB keyboard

 

. HiFimeDIY Sabre Tiny USB DAC:

PC or Mac >> HiFimeDIY Sabre Tiny USB DAC >> IEM

 

 

 USB OTG cable adapter:

http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=micro+USB+OTG+cable+adapter&rh=i%3Aaps%2Ck%3Amicro+USB+OTG+cable+adapter

post #3056 of 5602

I tested the DAC on my PC and it worked fine. It looks like there's either something wrong with my OTG cable (maybe they sent me a non-OTG cable?) or something is wrong with my phone -- I can't get any of my flash drives to mount to my phone through the OTG cable. 

 

Bleh.

post #3057 of 5602
Quote:
Originally Posted by m-i-c-k-e-y View Post
 

Any body could point me where could i download free 32bit 384khz audio file to test my M2tech Hiface Dac?

 

Will be highly appreciated. Thanks! 

 

2L, a Norwegian record label, has a section of downloadable content with files ranging from DSD to hi-res PCM.

 

http://www.2l.no/hires/index.html

post #3058 of 5602

I don't follow the thread any longer, so I'm sure it's already been mentioned.  But in case it hasn't, my AT&T Galaxy S4 with AOSP Slim Bean 4.3 beta 5 is working great with my Behringer DAC.

Slim Bean is my favorite AOSP ROM.  That and Liquid Smooth which is based on Slim.

post #3059 of 5602
Quote:
Originally Posted by SV_huMMer View Post
 

 

2L, a Norwegian record label, has a section of downloadable content with files ranging from DSD to hi-res PCM.

 

http://www.2l.no/hires/index.html

The reality is that beyond the 96/24 and 192/24 downloads that HD Tracks offers, there really isn't much HiRes in higher bit rates and frequency available. To the point, the M2Tec, Geek DAC, etc DACS that offer these bit rates and frequency to me offer the holy grail of unobtanium music, not my pursuit, my 2 cents. satwilson

post #3060 of 5602
Quote:
Originally Posted by z0rz View Post
 

I tested the DAC on my PC and it worked fine. It looks like there's either something wrong with my OTG cable (maybe they sent me a non-OTG cable?) or something is wrong with my phone -- I can't get any of my flash drives to mount to my phone through the OTG cable. 

 

Bleh.

I have bought 3 so called OTG cables. 2/3 were actually OTG. satwilson

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