Android phones and USB DACs | Page 115 | Headphone Reviews and Discussion - Head-Fi.org

breadvan · Feb 13, 2013 at 11:29 PM

This micro to mini cable was kindly recommended by another member and working great on my setup, although wishing it could be even shorter.

http://www.ebay.com/itm/251211470827?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648

meiaen · Feb 13, 2013 at 11:42 PM

Quote:

breadvan said:
This micro to mini cable was kindly recommended by another member and working great on my setup, although wishing it could be even shorter.

http://www.ebay.com/itm/251211470827?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648

http://www.ebay.ca/itm/221132769855?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_5120wt_1354

I bought this one to try it out..

Or you could order one from toxic cable the right angle Ibasso micro to mini OTG

breadvan · Feb 14, 2013 at 1:29 AM

meiaen said:
http://www.ebay.ca/itm/221132769855?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_5120wt_1354

I bought this one to try it out..

Or you could order one from toxic cable the right angle Ibasso micro to mini OTG

Great I'll definitely get the one on eBay, thanks a lot. I already have the iBasso DZero but most likely will sell it so will keep that cable for the future owner.

DanBa · Feb 14, 2013 at 6:55 AM

rckyosho · Feb 14, 2013 at 12:14 PM

Just realized that I have not tested my 5 year old Citypulse DA2.03e DAC that I'm using in the living room with my S3.
Tested it today and guess what it works! Another option for me for the times I'm lazy to turn the PC on

.

astropet · Feb 14, 2013 at 4:06 PM

n0sferatu said:
I know I post there under the same name (in that thread already mind you). Already tried that.

There is a CyanogenMod 10.1 based rom that combines Timur's kernel with the jacknorris mods. It supports hotplugging, usb charging, FI etc. Everything is configurable in the settings menu. It's pretty slick.

http://mehrvarz.github.com/nexus-7-usbrom/

thegrobe · Feb 14, 2013 at 4:20 PM

astropet said:
There is a CyanogenMod 10.1 based rom that combines Timur's kernel with the jacknorris mods. upports hotplugging, usb charging, FI etc. Everything is configurable in the settings menu. It's pretty slick.

http://mehrvarz.github.com/nexus-7-usbrom/

Thanks for sharing that...I am going to give it a try. I was able to get hotplugging working with that other method, but it messed up the root somehow. . My nexus 7 was then reading "not rooted" using root check and such.

N0sferatu · Feb 14, 2013 at 4:58 PM

Quote:

astropet said:
There is a CyanogenMod 10.1 based rom that combines Timur's kernel with the jacknorris mods. It supports hotplugging, usb charging, FI etc. Everything is configurable in the settings menu. It's pretty slick.

http://mehrvarz.github.com/nexus-7-usbrom/

Okay I'll look into that later...question though, is there a way to get this working on another ROM? I'm currently on Dirty Rootbox and I enjoy the AOKP feature sets...

EDIT: I just installed that ROM (haven't tried the USB part yet) but I noticed wow it's BARE BONES. There's no Play Store even included. Nevermind flashed Gapps LOL. Testing it now...

Theogenes · Feb 15, 2013 at 12:31 AM

Quote:

meiaen said:
http://www.ebay.ca/itm/221132769855?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_5120wt_1354

I bought this one to try it out..

Or you could order one from toxic cable the right angle Ibasso micro to mini OTG

I just checked out that listing, and I don't see anything saying it's an OTG cable, so I'm not sure that will work for an external DAC. Naturally, I'm open to being corrected on this, but even in looking at the picture, it looks like the micro-USB plug has all the pins present, and I think the OTG cable is missing one of the plugs.

But hey, if it ends up working, who cares what I think?

Theogenes · Feb 15, 2013 at 12:49 AM

Might be a dumb question, but for those of us w/ Samsung Galaxy Tabs (7.7 in my case), would one of the USB OTG adapters and card readers that fit into the Sammy port (like this) stand any chance of providing USB audio out? I'm assuming that even if it did work, it would only work with USB Audio Recorder, but it would be GREAT if that combo would work b/c I could run my tablet battery down on long trips instead of my phones :wink:

Just curious if anybody had any experience with this or, barring that, knowledge that might be useful. Thanks in advance, guys!

N0sferatu · Feb 15, 2013 at 12:59 AM

astropet said:
There is a CyanogenMod 10.1 based rom that combines Timur's kernel with the jacknorris mods. It supports hotplugging, usb charging, FI etc. Everything is configurable in the settings menu. It's pretty slick.

http://mehrvarz.github.com/nexus-7-usbrom/

Sweet hotplugging now works! I will look into this but do you know if there is a way to incorporate that USB host settings menu into another ROM? I miss my AOKP tweaks. Is that menu that is called the jack norris mod?

rckyosho · Feb 15, 2013 at 1:50 AM

Quote:

theogenes said:
Might be a dumb question, but for those of us w/ Samsung Galaxy Tabs (7.7 in my case), would one of the USB OTG adapters and card readers that fit into the Sammy port (like this) stand any chance of providing USB audio out? I'm assuming that even if it did work, it would only work with USB Audio Recorder, but it would be GREAT if that combo would work b/c I could run my tablet battery down on long trips instead of my phones

Just curious if anybody had any experience with this or, barring that, knowledge that might be useful. Thanks in advance, guys!

No experience with this but there is a very high chance of this working with USB audio recorder. Invoking the host mode(OTG mode) on the tab require a 20k resistance on pin 13 and 15 on the 30 pin connector which the adapter should have since you can use your mouse with it. The only concern here is whether you could use it to read a memory card while outputing usb audio at the same time.

Theogenes · Feb 15, 2013 at 9:15 AM

Quote:

rckyosho said:
No experience with this but there is a very high chance of this working with USB audio recorder. Invoking the host mode(OTG mode) on the tab require a 20k resistance on pin 13 and 15 on the 30 pin connector which the adapter should have since you can use your mouse with it. The only concern here is whether you could use it to read a memory card while outputing usb audio at the same time.

Thanks for the reply!! And while that would be exceedingly awesome to be able to output USB audio AND pull your music from the memory card reader at the same time, the thought hadn't even occurred to me-- yet, anyway :wink:

. I may have to snag one of these off ebay and give it a go! Here's hoping someone can get USB audio set up as a service soon, so we don't have to give up the media player interfaces we like

.

Swimsonny · Feb 15, 2013 at 12:07 PM

Your best bet would be looking for a kernel with USB audio. I am sure there is one.

DanBa · Feb 15, 2013 at 2:23 PM

Samsung Galaxy S3 & Graham Slee Bitzie USB DAC with analogue output stage volume control:
http://www.gspaudio.co.uk/bitzie-usb-dac-external-soundcard.htm

"The only great sounding USB DAC to work with a mobile phone...
Plug & play compatible with Samsung Galaxy S3 running Android Jellybean. Over 7 hours continuous playing time!"

"OK, quality into high impedance headphones? HD250II: too good! K701: I'm shocked! HD800: almost very natural! All three very revealing... HD800 doing guitar string slides and moist mouth vocals extremely real."
http://audio-forum.gspaudio.co.uk/bitzie-usbdac-preview_topic1701_page3.html

"It's also got an output stage... yes AN OUTPUT STAGE! Which drives headphones direct - any impedance - with only 18 Ohms output impedance. It does not go direct from the DAC outs without any filtering like most do! The output has a thing called gain and it also has proper sampling frequency filtering that's effective and yes it's fast (some people call it PRAT but I call it fast) It also does line level, and there is a 3 position switch hidden away under the USB socket to let you preset the volume to suit - and you can press it to mute - and press it again to un-mute... snazzy!"
http://audio-forum.gspaudio.co.uk/usbdac-prototype_topic1605_page1.html

"The volume control is between the analogue output of the DAC chip and the input of the analogue output stage. Therefore it can be used to set the volume of the headphones or the volume of the amp it's serving depending on use.

The output voltage is 0 - 2V. It provides 9dB extra sound pressure level to 32 Ohm headphones (e.g. 107dB max SPL from Grado headphones with suffix i), 11dB extra sound pressure level into 300 Ohm headphones (e.g. 113dB max SPL from HD800's), and 12dB extra sound pressure level into 62 Ohm headphones (e.g. 117dB max SPL from AKG K701's). Roughly the equivalent of the Voyager.

The analogue stage also contains a low pass filter (LPF) having a third order Butterworth filter slope, acting above the audio spectrum which is facilitated by the DAC using 8Fs oversampling. The filter being designed to produce a SQ and sound stage not dissimilar to a Reflex M"
http://audio-forum.gspaudio.co.uk/usbdac-prototype_topic1605_page15.html

"The Bitzie USB-DAC (external sound-card) is a USB powered device which automatically recognises any USB audio bit depth and sampling frequency. It then sends it in S/PDIF format to a coaxial out (phono socket) or optical transmitter at "CD quality" (16/44.1 (48)), and it also has an analogue audio output. The analogue audio output is derived from an 8Fs oversampling D-A converter and presented to an Alps manual rotary volume control and then to a low pass filter (LPF) amplifier with +6dB gain. The output of this amplifier is presented on two jacks: a mini jack and a full size 1/4" jack in parallel. A pair of headphones can be connected to the jack suitable for the headphone plug. The amplifier which is short circuit proof will drive any headphone impedance. Alternatively using a jack to 2 x phono adapter, the analogue output may be used to drive an amplifier.

The S/PDIF outputs of the Bitzie USB DAC have been tested into the "big DAC" prototype S/PDIF coaxial and optical inputs, and the analogue outputs into the Proprius monoblock power amplifiers. The analogue outputs have also been tested using HD800, HD250II, HD600, SR60, SR80, K701, A-700 and A-900 headphones. All work exceedingly well."
http://audio-forum.gspaudio.co.uk/usbdac-prototype_topic1605_page17.html

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