Enable USB audio on any Android 4.0 smartphone/tablet - Page 12 - AVS | Home Theater Discussions And Reviews
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post #331 of 348 Old 01-22-2015, 12:03 PM - Thread Starter
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Computing devices (i.e. PC, smartphone, ...) & noises:
http://align-centre.hatenablog.com/e...4/05/10/233000



Intentional 4G/3G/2G/WiFi/Bluetooth radio frequency emitters and receivers with a high electronic integration density within a very limited small volume like smartphones, i.e. small computing devices, should create a lot of EMI/RFI noises.



A solution: moving the DAC/amp from the noisy Android device



"In the second design, the external audio peripheral C can be designed for higher audio quality and greater power output without impacting the cost of the basic mass market Android device B. Yes, it is a more expensive design, but the cost is absorbed only by those who want it.

Mobile devices are notorious for having high-density circuit boards, which can result in more opportunities for crosstalk that degrades adjacent analog signals. Digital communication is less susceptible to noise, so moving the DAC from the Android device A to an external circuit board C allows the final analog stages to be physically and electrically isolated from the dense and noisy circuit board, resulting in higher fidelity audio." [Android audio team]
http://source.android.com/devices/audio/usb.html



A further solution: no 5V voltage bus power line from the noisy Android device (cleaner 5V power from an external 5V battery, no EMI/RFI noise issued by the Android device via the 5V Vbus power line, no cross contamination of the USB data lines by the USB Vbus power line)

OTG Micro to Micro cable for self-powered USB DAC which doesn't need 5V from the host
"Mundorf Silver/Gold wire, 0.5mm
D+, D-, Gnd, no 5V"
https://www.facebook.com/ElijahAudio

"Our USB products offer the option of clean battery power, whilst isolating the DAC from the noisy 5v power."
http://www.elijahaudio.com/

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Last edited by DanBa; 02-16-2015 at 02:50 PM.
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post #332 of 348 Old 01-26-2015, 07:13 AM
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USB Audio Player Pro (UAPP) now supporting live radio streams.

Listen to www.radioparadise.com = http://stream-tx3.radioparadise.com/aac-128 (AAC 128k)

That's great, works a treat!
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post #333 of 348 Old 01-29-2015, 08:35 AM - Thread Starter
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Another further solution: no 5V voltage bus power line from the noisy Android device (cleaner 5V power from an external 5V battery, no EMI/RFI noise issued by the Android device via the 5V Vbus power line, no cross contamination of the USB data lines by the USB Vbus power line)

"OTG cable with Battery lead
Mundorf wire
Samsung S4 to HERUS Dac powered by 5V , 1A lipstick battery
DAC and battery attached to underside of Phone case with double sided foam tape
Snap the phone in the case , plug in the cable and Headphones and listen to wonderful sound anywhere"

Samsung Galaxy S4 > USB audio out >> Elijah Audio USB OTG-Y cable powered by an external 5V/1A lipstick battery >> USB-powered Resonessence Labs Herus USB DAC/amp >> headphones

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post #334 of 348 Old 01-30-2015, 04:28 AM - Thread Starter
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Qantas adds virtual reality option for in-flight entertainment
http://www.qantasnewsroom.com.au/med...for-travellers
http://www.techradar.com/reviews/gam...1263308/review
Enable USB audio on any Android 4.0 smartphone/tablet

"Qantas Group Executive, Brand, Marketing & Corporate Affairs Olivia Wirth said the technology will open up a new world of lounge and in-flight entertainment for customers, as well as give Qantas a powerful way to preview destinations and experiences.

“Whether the user wants a virtual tour of our new Los Angeles First Lounge or experience an A380 landing from the tarmac, this technology gives us a completely new way to connect with our customers,” said Mrs. Wirth.

“From an in-flight entertainment perspective, it’s an industry first. Qantas is committed to being at the forefront of innovation to give our passengers the very best and latest in-flight experiences, like accessing the virtual worlds of their favorite Hollywood blockbusters from the comfort of their seat 40,000 feet above the ground.

“It’s also a fantastic tool to feature our network’s destinations, inspiring travel and promoting tourism.”"


legacy movie file / virtual tour file > virtual reality audio-video player running on a Samsung Galaxy Note 4 slotted into a Samsung Gear VR headset > Note 4's DAC > Note 4's amp > headphone out >> headphones











Legacy movie player: Oculus Cinema: a personal giant screen movie theater



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post #335 of 348 Old 01-31-2015, 02:08 AM - Thread Starter
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ExoDrive smartphone case promises to add external microSD card support:
http://www.exo-drive.com/
https://www.kickstarter.com/projects...-c/description https://drive.google.com/file/d/0Bxb...p5WVBjaW8/view

"Exo-Drive cases bring expandable micro-SD card storage to select devices."
"MicroSD, microSDHC, and microSDXC cards are supported. Currently available cards up to 128GB will work. Cards up to 2TB in size are supported, however currently do not exist."

compatible Android phone > microUSB port >> Exodrive case + 128GB microSD > microUSB port >> USB OTG cable >> USB DAC amp >> headphones







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post #336 of 348 Old 02-01-2015, 08:24 AM - Thread Starter
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Tiny affordable HiFime 9018 asynchronous USB DAC "able to drive most 16-300ohm headphones": DSD, 32/384, digital volume control
http://hifimediy.com/9018-dac
http://hifimediy.com/news/announcing...18-series.html
http://hifi.me/otg-adaptor

"In the Hifime 9018 dac we have managed to fit the high resolution, audiophile Sabre ES9018K2M DAC chip in a tiny compact box, the same used in our U2 and UAE23 Sabre dac's. We used a double PCB to be able to fit in this small box. This chip has great specs like 127dB DNR, -120dB THD+N and patented Time Domain Jitter Eliminator.

The USB receiver is the Savitech SA9227 USB used in asynchronous mode (more about that here). It supports all sample rates up to 384Khz/32 bit and are clocked by two onboard oscillators. Hifime 9018 has MAX97220A headphone chip that can drive headphones down to 16 ohm as well as higher impedance headphones as the Sennheiser HD650. The volume level goes quite loud, more than enough for 300ohm HD650's.

It works without drivers in Mac, Linux, and requires drivers to be installed in Windows. Note that 384khz only works with ASIO which is accepted by some programs only, and not by Chrome, Youtube etc. Chrome on Mac's also doesn't support 384kHz. It uses by default USB Audio Class 2 which is required for sample rates above 96kHz. It will switch down to Class 1 if USB High speed mode is not available. It also have (like the U2 and UAE23) an optical output, which works up to 192khz. In addition to normal PCM format It can play DSD files.

We think the sound of this DAC is really great! Another cool features is that it works with Android 5.0! This makes it a super small portable highly audiophile solution. Only caveat with phones is that it draws much more power than our smaller Android dac. The Nexus 6 battery lasts for 6 hours when playing constantly with the 9018 dac."

Android 5.0 Lollipop-powered Google Nexus 6 > native USB audio out >> HiFime microUSB OTG adaptor >> HiFime 9018 asynchronous USB DAC/amp >> headphones






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post #337 of 348 Old 02-03-2015, 02:00 PM - Thread Starter
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A gift for the next Christmas: Virtual Reality (VR) headset for movies / music / …

https://twitter.com/DanielBa78/statu...96761966624769
https://plus.google.com/u/0/10582542...ts/HV243vvq2er
https://www.facebook.com/ba.dan.5/po...06301606444956
Enable USB audio on any Android 4.0 smartphone/tablet


The main asset of mobile-based VR is that people have already their mobile phone; they simply need to add an affordable phone accessory, a VR headset, for next-generation entertainment in the virtual environment: giant screen movie theater, concert, tour, games, ...

Mobile-based VR for the time being: Samsung Galaxy Note 4 + Samsung Gear VR
Enable USB audio on any Android 4.0 smartphone/tablet
https://twitter.com/Qantas/status/561289250302222336

audio-video file > VR player running on a 2560*1440-screened Galaxy Note 4 phone slotted into a Gear VR headset > headphone out >> headphones




Apparently, the killer app for mobile-based VR entertainment could be the player of movies (i.e. traditional 2D / 3D movies or new VR movies).

In order to have a great movie experience, the mobile VR device (i.e. mobile phone + VR headset) should provide the cleanest and most immersive audio possible:

. Clean audio via USB out port:
movie file > VR movie player running on a mobile phone slotted into a VR headset > PCM audio stream > VR headset's USB out >> standard USB DAC/amp >> standard headphones

. Immersive audio via virtual surround sound engine (Smyth Research's SVS, ...):
5.1/7.1 audio-encoded movie file > VR movie player with virtual surround sound engine running on a mobile phone slotted into a VR headset > PCM audio stream > USB audio out >> USB DAC/amp >> headphones

In order to have an immersive viewing enjoyment, the mobile VR device should provide most natural images possible at the highest possible resolution:

. Highest possible resolution in the next future: 4K or 3840*2160 (i.e. 1920*2160 per eye)
movie file > VR movie player with virtual surround sound engine running on a mobile phone with 4K display slotted into a VR headset > USB audio out >> USB DAC/amp >> headphones

. Most natural images possible using High Dynamic Range (HDR) technology (Dolby Vision, ...):
upcoming HDR-encoded movie file > VR movie player with HDR & virtual surround sound capabilities running on a mobile phone with 4K display slotted into a VR headset > USB audio out >> USB DAC/amp >> headphones


USB audio out, virtual surround sound, 4K display and HDR are obviously useful for other potential VR killer apps like games or videos (VR concert, VR tour, ...).
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Last edited by DanBa; 02-03-2015 at 02:32 PM.
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post #338 of 348 Old 02-05-2015, 01:17 PM
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New version of the: Onkyo HF Player 'Android app'

A new version of the Onkyo HF Player 'Android app' was release on Tue 03 Feb 2015. Here's a link: https://play.google.com/store/apps/d...icplayer&hl=en

Once installed on your phone you are offered access to the Onkyo HF Player Unlocker app. Which costs a modest £5.58 (in the UK).


Cheers
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post #339 of 348 Old 02-08-2015, 04:58 AM - Thread Starter
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Thanks !


Onkyo HF Player is another music player app which includes its own USB audio soft/user space driver.






It can play and output native DSD (DoP); or it can convert DSD to "pure" PCM and output the PCM audio stream.

DSD file > Onkyo HF Player running on Galaxy Note 3 > PCM audio stream >> XMOS USB 384K/32bit DAC




It can play DXD music file and output DXD (i.e. 352.8kHz PCM) audio stream.

DXD file > Onkyo HF Player running on Galaxy Note 3 > DXD audio stream >> XMOS USB 384K/32bit DAC




It can handle upsampling (44.1 => 88.2; 44.1 => 176.4; 48 => 96; 96 => 192).
http://www.audiostream.com/content/m...-player-or-dac

44.1kHz file > Onkyo HF Player running on Galaxy Note 3 > 44.1kHz PCM audio stream >> XMOS USB 384K/32bit DAC




44.1kHz file > Onkyo HF Player with upsampling activated running on Galaxy Note 3 > 176.4kHz PCM audio stream >> XMOS USB 384K/32bit DAC




There is no hardware volume control for this V1.0.0 release.

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Last edited by DanBa; 02-10-2015 at 01:32 PM.
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post #340 of 348 Old 02-10-2015, 01:34 PM - Thread Starter
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post #341 of 348 Old 02-14-2015, 01:54 PM - Thread Starter
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Real-time DSD Convert feature introduced with upcoming Onkyo HF Player v2.0.0?
http://av.watch.impress.co.jp/docs/n...14_688346.html
http://hi-res.koss.jp/how-to-activat...kyo-hf-player/
http://blog.ratocsystems.com/wp/?s=REX-KEB03+

"Onkyo HF Player Ver.2.0.0 has added a new function which calls “Real time DSD convert” function. It converts PCM (WAV, FLAC, ALAC, e.t.c.) high & normal resolution audio files to DSD high res audio signals."

regular FLAC-encoded music file > Onkyo HF Player v2.0.0 (?) with DSD Convert feature enabled running on Sony Xperia Z3 > DSD over PCM stream >> USB OTG cable >> DSD input > Ratoc REX-KEB03 USB DAC/amp









DSD input vs. regular PCM input: different audio signal path, different sound quality?
http://www.cirrus.com/en/products/cs4398.html
http://www.cirrus.com/en/products/wm8741.html

Regular PCM audio path:
regular FLAC-encoded music file > Onkyo HF Player running on Sony Xperia Z3 > regular PCM stream >> USB OTG cable >> PCM input > Ratoc REX-KEB03 USB DAC/amp



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post #342 of 348 Old 02-18-2015, 03:53 AM - Thread Starter
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Samsung Galaxy Note Edge & DSD capable Sony PHA-3:
http://sinacn.weibodangan.com/user/1...07353957066200

Galaxy Note Edge >> USB OTG cable >> Sony PHA-3 USB DAC/amp >> headphones





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post #343 of 348 Old 02-19-2015, 03:47 AM - Thread Starter
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A backpack setup
http://www.tellementnomade.org/forum...p?f=122&t=9664

music files stored on a 2TB Wi-Fi hard disk drive >> Wi-Fi link >> Samsung Galaxy Note3 wirelessly powered >> USB OTG cable >> Cypher Labs Theorem 720 USB DAC/amp >> headphones

music files stored on a 2TB Seagate USB hard disk drive connected to a RAVPower RP-WD02 Wi-Fi file hub powered by a XTPower battery pack >> Wi-Fi link >> Galaxy Note3 wirelessly powered by a XTPower battery pack via a QiFull Qi wireless transmitter & receiver >> USB OTG cable >> Cypher Labs Theorem 720 USB DAC/amp powered by a XTPower battery pack >> BeyerDynamic T5P headphones



1: Galaxy Note3 + Qifull Qi wireless transmitter & receiver + Cypher Labs Theorem 720
2: XTPower battery pack
3: RAVPower RP-WD02 Wi-Fi file hub
4: 2TB Seagate USB hard disk drive


About Qi wireless charging:

XTPower battery pack >> Qifull Qi wireless transmitter >> Galaxy Note3: Qifull Qi wireless receiver










About 2TB Wi-Fi hard disk drive: a wireless DLNA/Samba-compliant Network Access Server (NAS)

music files stored on a 2TB Seagate USB HDD connected to a RAVPower RP-WD02 file hub acting as a DLNA/Samba NAS server >> Wi-Fi link >> music player acting as a DLNA/Samba NAS client running on Galaxy Note3 >> USB OTG cable >> USB DAC/amp >> headphones





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post #344 of 348 Old 02-24-2015, 06:12 AM - Thread Starter
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DSD capable Celsus Sound Companion One USB DAC/amp:
http://www.post76.com/wordpress/?p=73560

Sony Xperia Z3 >> USB OTG cable >> CS Companion One >> IEM









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post #345 of 348 Old 02-25-2015, 03:09 AM - Thread Starter
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Cmoar headset with USB out:
Enable USB audio on any Android 4.0 smartphone/tablet
https://www.kickstarter.com/projects...ntegrated-elec

movie file > movie player running on a smartphone slotted into a Cmoar headset > PCM audio stream > Cmoar headset's USB out >> USB DAC/amp >> headphones













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post #346 of 348 Old 02-26-2015, 01:44 AM
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Quote:
Originally Posted by DanBa View Post


There is no hardware volume control for this V1.0.0 release.

Maybe it was a fluke, but when I connected my Fiio E18 dac/amp the phone's [Sony Z3] playing the native Walkman app first then I switched to the Onkyo HF player for playback the volume sounded low so I checked the volume on the phone and sure enough it was part of the signal chain. I also noticed that that the upsampling feature didn't function. So I unplugged the Fiio, and then re plugged it, the phone's volume was out of the loop and the upsampling function was back again. Note that I didn't change any of the settings in the menu, all I did was plug in the OTG cable and unplug it. There is a message that bumps up upon plugging in the OTG cable for allowing the USB host for this app, but that's it.

sent via Morse code...........

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post #347 of 348 Old Yesterday, 01:51 AM - Thread Starter
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Quote:
Originally Posted by thehun View Post
... So I unplugged the Fiio, and then re plugged it, the phone's volume was out of the loop and the upsampling function was back again...
What are your impressions about the sound quality when upsampling?
http://www.audiostream.com/content/m...-player-or-dac

Thanks.



USB Audio Player Pro: Personal Audio Product of the Year
http://everythingaudionetwork.blogsp...&max-results=3





"Okay, it has not officially been reviewed on EAN yet, but, boy, do I ever use USB Audio Player Pro. This $9.00 Android hi-res player features up to 32-bit/384 sample rate PCM and 2.8 MHz DSD playback when linked to a compatible a USB-input DAC. Plus, it decodes FLAC, WAV, AIFF, MP3, OGG, etc.
It works with most noted Android tablets, and its transparent playback to your favorite DAC sounds aces. Rivals the computer player software. USB Audio Player Pro also contains playlist management features, EQ and several tweaks to assure smooth playback with different devices.

What’s really handy is its portability. USB Audio Player Pro allows you to play super high res, such as 24/384 and DXD), without going through a computer.
Thus, it is extremely portable. I have it installed on two Dell tablets and an Android Smartphone. I keep one in my main audiophile rig and one in my recording suite to monitor my home-brew 24/384 PCM guitar recordings. I also use an Android Smartphone and a Resonessence Concero HP for mobile hi-res listening.

There are a few hi-res audio software players out there for smart devices to output hi-res audio via USB, but none that I have tried can touch USB Audio Player Pro."
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Last edited by DanBa; Yesterday at 01:56 AM.
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post #348 of 348 Old Today, 02:07 PM - Thread Starter
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SanDisk Unveils the World’s Highest Capacity microSD™ Card:
http://www.sandisk.com/about-sandisk...emium-edition/

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