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iBasso DX90. Dual Sabre, 1st page: Downloads, info & instructions- New dac software! & 2.1.5 FW.... - Page 475

post #7111 of 9352
Quote:
Originally Posted by darenk View Post

Yeah I tried 2 difference cables. I just successfully charged another device with the micro USB cable supplied with the dx90. Sigh, this is so frustrating.

If you have another s3 battery, try it to confirm that the battery is not the issue. Mine could not switch on too. I uninstalled the drivers, and manually installed the rockusb ones. Connected to my pc, then magicly it turned on. Since your using mac, I cant help you because I do not know the whereabouts of mac os, never used one. I do hope you get to fix yours asap.
post #7112 of 9352

This is why I told him to connect to his computer in program mode. I mistakenly said to hold the next button while connecting. It should be the Vol + button.:o Of course, I have no idea if a MAC will recognize it. May need a PC and this link for the tool and it's drivers http://www.freak-tab.de/freaktab/Rockchip_Batch_Tool_v1.7.rar

post #7113 of 9352
Quote:
Originally Posted by coolmingli View Post
 

can someone comment on "low volume + high gain vs high volume + low gain"?

Headphones will be easy push IEMs.


OK I'll bite.

 

Gain typically refers to the audio signal level. It is often expressed in dB, where 0 dB is the maximum voltage level, -3 dB is half level, etc. It is related to signal amplitude and is sometimes incorrectly expressed in mV. Measure with multimeter when expressed as mV but dB is more useful.

 

Volume typically refers to the sound level. It is also expressed as dB, where 70 dB is very quiet and 140 dB will deafen you. Speaker volume varies according to input level and speaker impedance. Measure with sound level meter.

 

Best noise rejection is highest gain + low volume. Did I get it right?

post #7114 of 9352

Thanks for the link. I've downloaded the files. How do I install the drivers? I've access to Windows OS on my Mac. Trying it now.

post #7115 of 9352
I am really enjoying mine.
I haven't done any dedicated burn in as such, just listening to it evolve.
Really enjoying the latest firmware and soft filter.

I must say though, all in all I am very happy with the firmware,ui and sound.

Looking forward to putting more hours on it smily_headphones1.gif

Need to do some reading on how the sound improved with burn in to make sure I am not just imagining things, but I will get to that, too busy just enjoying it for now
post #7116 of 9352
Quote:
Originally Posted by darenk View Post

Yeah I tried 2 difference cables. I just successfully charged another device with the micro USB cable supplied with the dx90. Sigh, this is so frustrating.

 

Have you tried holding down the power button for 30+ seconds?  I seem to remember having a similar problem and that solved it. 

post #7117 of 9352
Thread Starter 

The RKbatchtool can only be used on a Microsoft based system so use that. The instructions and link for it are on the 1st page of this thread. I have a Mac and borrowed a friends laptop to use it. The instructions are also in the download. It took me a couple of tries to figure out how to use it, now it is easy. Remember to hold down just the volume up button when plugging in the USB cable to the PC. 

post #7118 of 9352

 

I finally managed to boot Rockbox on DX90. Now just need to figure out how to automatically mount the SD Card. :bigsmile_face: 

 

EDIT:

 

Storage mounts fixed and I can now play music. Now another problem. Volume control does not seem to be working. :confused_face:


Edited by headwhacker - 7/19/14 at 10:42am
post #7119 of 9352
Quote:
Originally Posted by headwhacker View Post




I finally managed to boot Rockbox on DX90. Now just need to figure out how to automatically mount the SD Card. bigsmile_face.gif  

EDIT:

Storage mounts fixed and I can now play music. Now another problem. Volume control does not seem to be working. confused_face.gif

Where can we find more info on Rockbox for the DX90?
post #7120 of 9352
Quote:
Originally Posted by headwhacker View Post

 

I finally managed to boot Rockbox on DX90. Now just need to figure out how to automatically mount the SD Card. :bigsmile_face: 

 

EDIT:

 

Storage mounts fixed and I can now play music. Now another problem. Volume control does not seem to be working. :confused_face:

 

AWESOME.  The volume issue is probably differences between the Sabre chip and the Wolfson - I believe both DX90 and DX50 use the digital volume control on the DAC chip. 

post #7121 of 9352
Keep at it , I'll be interested in booting rockbox on my dx90,but will need instructions 😊
post #7122 of 9352
Quote:
Originally Posted by headwhacker View Post




I finally managed to boot Rockbox on DX90.

When this is finished, you will my hero smily_headphones1.gif
post #7123 of 9352

For those who want to revert to 2.0 firmware without computer connection, one can have the DX90 boots to "recovery mode" by pressing both the volume+ and power button to start up. There will be a "wipe cache" and "update from SD card" option

post #7124 of 9352
Quote:
Originally Posted by nmatheis View Post


Where can we find more info on Rockbox for the DX90?

 

Still too early. There are still things need to be fix first before it's usable.

 

Quote:
Originally Posted by jj69 View Post
 

 

AWESOME.  The volume issue is probably differences between the Sabre chip and the Wolfson - I believe both DX90 and DX50 use the digital volume control on the DAC chip. 

You are right. I looked at the /proc/last_message before I went to bed last night and I can still see references to the wm8740 DAC.

 

Now, it's time to scan the code and replace the DAC reference to the Sabre DAC.


Edited by headwhacker - 7/25/14 at 11:59pm
post #7125 of 9352
Amazing work on rockbox smily_headphones1.gif
Not sure if I will take the leap when its operational. I actually quite like the stock firmware.

Guess it depends on the sonic benefits smily_headphones1.gif

You guys are awesome though. I wish I had the time or ability for such ports and projects smily_headphones1.gif
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