thebrockelley
New Head-Fier
- Joined
- Jan 18, 2013
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- 10
Now, if only it wasn't two weeks away from anyone.
thanks for answering. Since it is my phone, i am always a bit leery of changing something that could mess up the phone functionality. I also thought that the T-Mobile US version did not have the Wolfson chip anyway. I'd be more interested in a solution that involved a pairing of something like Neutron and the usb enabling of usbaudiorecorder to work together, as it looks like this may be something in-progress.
Okay, about re-amplifying an amplified signal. Here is something that puzzles me.
I have an international T-Mobile Galaxy S3 and an iBasso D-Zero. USB audio out via the supplied OTG cable to the DAC works flawlessly. But changing the volume on the smartphone, changes the volume of the music I hear in my headphones.
How is that possible? The data stream from the smartphone to the DAC is supposed to be all digital, so how can it be amplified by the source?.
There is no way that the D-Zero is picking up an analog signal, sends that through the DAC and from thereon to its amp. USB is never analog, right?
Using the same DAC/AMP with a Macbook Pro or an iPad, the volume of the source component is automatically set to max and locked.
Any ideas? Thanks!
Okay, about re-amplifying an amplified signal. Here is something that puzzles me.
I have an international T-Mobile Galaxy S3 and an iBasso D-Zero. USB audio out via the supplied OTG cable to the DAC works flawlessly. But changing the volume on the smartphone, changes the volume of the music I hear in my headphones.
How is that possible? The data stream from the smartphone to the DAC is supposed to be all digital, so how can it be amplified by the source?.
There is no way that the D-Zero is picking up an analog signal, sends that through the DAC and from thereon to its amp. USB is never analog, right?
Using the same DAC/AMP with a Macbook Pro or an iPad, the volume of the source component is automatically set to max and locked.
Any ideas? Thanks!
It depends on how the DAC is set up, most DACs I use with my PC also allow PC-side volume and EQ control. Don't worry, your external DAC is doing all the heavy lifting.
Thanks, NZtechfreak!
EQ control I understand. That is -I think- an alteration made to the outgoing signal made before it is passed to the DAC. EQ information is part and parcel of the data stream, so to say.
If I understand you correctly, volume level can be a component embedded in the digital signal offered to the DAC as well? And it depends on the specific DAC whether it does anything with that part of the data stream?
So it is both a function of the source component (the volume level offered to the DAC is either fixed or continuously variable), and a function of the DAC (is the DAC able to respond to changes made to the volume level offered by the source or does it ignore changes, or is completely blind to those changes)?
Woah hold on both of you, changing the volume on your phone will cause a loss in SQ and lower the volume levels. Whats happening is digital volume control at 16bits, basically it sends less bits like 15~14 bits, and you lose those other bits in SQ.
The fix is to use 24bit output and the extra is just padded with 0's and then the 0's are truncated. so no loss in SQ.
But this is not possible in android. SO you MUST keep the phone volume on max.
Well that's strange. In my personal experience, if i boost the volume on my phone to max and adjust to a comfortable level on the dac, the lower bass will become distorted. If i lower the volume on the phone a bit and adjust on the dac the problem disappears, no distortion in sub-bass.
Any thoughts on this?
Ex:
Phone volume 10/10 + dac volume 3/10 = Bass distortion
Phone volume 7/10 + dac volume 6/10 = No distortion
Woah hold on both of you, changing the volume on your phone will cause a loss in SQ and lower the volume levels. Whats happening is digital volume control at 16bits, basically it sends less bits like 15~14 bits, and you lose those other bits in SQ.
The fix is to use 24bit output and the extra is just padded with 0's and then the 0's are truncated. so no loss in SQ.
But this is not possible in android. SO you MUST keep the phone volume on max.
Originally Posted by DanBa /img/forum/go_quote.gif
"D-Zero USB OTG hooked up to Galaxy S3. Works like a charm…
This is nice... I just received an iBasso D-Zero bought directly from the manufacturer. I had no idea that a short USB OTG cable is included in the box now.
The cable is marked iBasso Audio - Android 4.0 & Above USB OTG Cable.