USB DAC support on USB OTG enabled devices

[Nicholas Ku]

Samsung Galaxy Note 4 (Android 6.0.1) pairing with Xduoo XD-05 DAC/Amp.
No problems with this setup when using Generic driver (DAC frequensy is always 192kHz).But it has clicks even on 16/44.1 files, while choosing Direct USB Driver. Hi-res and especially DSD files is playing with glitches and lot of clicks. There is a not hardware problem, cause "USB Audio Player" plays flawlessly same FLACs ans DSFs

[ZERO]

Below please find some more information on which HW/SW configurations glitches/clicks appear too. Please tell if you will need more info.

For me this issue happens on multiple phones/Neutron settings, and details below describe settings where issue DOES occur, unless stated otherwise. I tried different settings, which in my opinion could eliminate glitching, but did not succeed. Below I provide only the settings, which are applicable IMO.

==================================

1. Phone: HTC 1 M8
Neutron versions: 1.87.1, 1.88.1
64-Bit Processing: on/off
VEC: NEON
DRV: OpenSl ES
Direct USB driver: on
32-bit Output: on/off
Frequency: 48000
Hardware latency: 2-192

**********************************
2. Phone: Alcatel 8008D: issue never occurs
Neutron versions: 1.87.1, 1.88.1
64-Bit Processing: on/off
VEC: NEON
DRV: OpenSl ES
Direct USB driver: on
32-bit Output: on/off
Frequency: 44100
Hardware latency: 2-192
**********************************

In below two configurations audio data is sent via USB to external DAC "Oppo HA-2", and this is where
severe glitching/clicking occurs.

3. Phone: HTC 1 M8
Neutron versions: 1.87.1, 1.88.1
64-Bit Processing: on/off
VEC: NEON
DRV: Oppo
Direct USB driver: on
32-bit Output: on/off
Frequency: 44100-352800
Hardware latency:
0-30: extreme glitching
300-400: less glitching

4. Phone: Alcatel 8008D
Neutron versions: 1.87.1, 1.88.1
64-Bit Processing: on/off
VEC: NEON
DRV: Oppo
Direct USB driver: on
32-bit Output: on/off
Frequency: 44100-352800
Hardware latency:
0-30: extreme glitching
300-398: less glitching

Audio source: MP3, FLAC, WAV, WV, with whole bunch of different frequencies, 16-bit; it seems that on some MP3s glitching/clicking is much worse, than on FLACs, surprisingly.

================================

It seems, that on HTC 1 with external DAC plugged in glitching disappears after long continuing listening. (I cannot tell exactly after which period of time, and I'm not sure here), but once another song is selected or forwarded to - glitching always reappears.

NOTE: the same issue with glitching occur in Onkyo HF player, when data is sent through USB to external DAC, hence I believe the problem exists not only in Neutron player.

Is this still an issue? I am considering getting an OPPO HA-2 for my Moto X Pure and want to make sure it is actually going to work before I buy it.

[Rod2]

I'm unsing a Samsung Tab E Lite 7" tablet.

Just got the Dragonfly Black DAC and an OTG cable.

The Dragonfly works perfectly connected to USB of my windows 7 laptop

but nothing from Samsung tablet. Music plays from the tablet speakers, nothing from the headphones connected to the Dragonfly.

Have looked at Audio Hardware section in Neutron and cannot make the music go to the USB output, no matter what.

Any advice? Is it possible it simply will not work with this tablet? it is running android version 4.4.4

[csricharan]

I have an Honor 7 and recently bought a Fiio Q1 Mk2. After some figuring out, I got it to work with the DAC but there is some sort of electronic interference which manifests as a low volume crackling noise when I scroll down the song list, use other functions or use the phone in any way. Does anyone have a solution? Because, I will have to return the DAC if I can't find a solution.

[saeidp65]

help

[blaubär]

help

It might help if you would elaborate

[saorabhv]

Recently bought this popular chifi BGVP T01 USB DAC.

Specification:

Model: BGVP T01 |
Core material: 4 strands 5N frozen version of single crystal copper wire base |
Plug: type-c to 2.5mm/3.5mm |
Length: 12.8 cm |
Dynamic range DNR: > 123dB |
Distortion THD+N: < 0.0003% |
Frequency Response: 20Hz-40kHz |
Output Impedance matching Impedance Range: 16 Ω - 600Ω |
Decoding capability: 32bit/384kHz; DSD64 / DSD128


This dac sounds superb. The separation is mind-blowing at this price. Truly surprised.

What I'm facing is difference in actual output capabilities of this device.

The device's actual max sample rate is 32bit 192khz as shown by apps like Neutron player, UAPP, Audirvana etc.
And no DSD 64/128 support at all.
But as specified, it should be like 32bit 384khz and must support DSD as well.

[Here is the detailed post regarding the same with snapshots.](https://www.head-fi.org/threads/usb-dac ... t-15862095)

Requesting those who owns the same to guide me on this.
Whether I'm using it correctly or not?

[Dexing]

I think I have a whole new problem?
Hardware:
Lg G Pad 8.0 with USB 3.5 and Micro
USB to Micro Nobsound 60w 2 Channel Amp
3.5mm to RCA Sound Stream dt2200 Amp

3.5mm registered as headphones and kicked off my pre amp for my 6x9’s does this program have the ability to pass audio through multiple media platforms? Bluetooth and 3.5mm or USB and 3.5mm?

[blaubär]

Lg G Pad 8.0 with USB 3.5 and Micro
USB to Micro Nobsound 60w 2 Channel Amp
3.5mm to RCA Sound Stream dt2200 Amp

3.5mm registered as headphones and kicked off my pre amp for my 6x9’s does this program have the ability to pass audio through multiple media platforms? Bluetooth and 3.5mm or USB and 3.5mm?

Afaik Neutron only ever uses one output channel at the same time.
You can bind equalizer presets and profiles to outputs, and profiles contain equalizer presets, perhaps that's a problem.
Could you elaborate on the situation, I didn't completely understand what device was bound to which profile/eq-preset, what the "6x9s" are, which amp was attached to the "6x9s", etc.

[Dexing]

Sorry if I wasn’t very descriptive.

LG G Pad USB to Nobsound Mini USB input for 6”x9” 200w peak JL audio speakers.

LG G Pad 3.5mm to Sound stream dt2200 RCA input for 12” 600w 2 channel Kaption subwoofers.