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The iBasso DX50 Thread - Latest firmware: 1.9.4 - January 24, 2016 - Page 886

post #13276 of 18427
Thread Starter 
I don't want to promote early findings if I am not 100% sure but again some of the bugs on the DX50 have just been that difficult to pin point the source. I have been using the DX50 HO without the amp so needless to say I was on the edge and fearful of a volume spike happening anytime soon and to my dismay, nothing. This might well indicate my suspicion about static problems and more specifically winter time with lots of heating, carpeting and plastic chair mat may all have contributed to spark the DX50 and triggering a volume spike. I am going to kept an eye on that but the firmware release for it is definitively going to be welcome.
post #13277 of 18427
Quote:
Originally Posted by burdie View Post
 

Would like to find out some confirmation from those having DX50 playing DSD tracking and output to external DAC via coaxial port. My external DAC is Matrix Mini-i pro which able to display the bit rate from input source. When I played DSD 2.8m track via mini coaxial my DAC will display a bit rate of 88khz, so DX50 actually downsampled DSD track to stereo PCM across the SPDIF interface and at lower 88khz? I knew SPDIF cannot support DSD track but, won't it be nice if it output at higher 192khz?


All the Dx50 does is to convert the DSD to PCM. DSD equals a PCM of 88.2-96khz, so that's why it displays those rates. There would be no point in upsampling it to anything higher than that.

post #13278 of 18427
Quote:
Originally Posted by AManAnd88Keys View Post
 


All the Dx50 does is to convert the DSD to PCM. DSD equals a PCM of 88.2-96khz, so that's why it displays those rates. There would be no point in upsampling it to anything higher than that.

Oh i didn't know that DSD equals to 88.2khz in PCM. Read somewhere that DSD is 2.8mhz which is almost 64x of 44.1khz and thought that downsampled to 4x at 176.4khz (this should be the right rate not 192, my mistake) will be nicer than downsampled to 2x at 88.2khz.

post #13279 of 18427
Quote:
Originally Posted by burdie View Post
 

Oh i didn't know that DSD equals to 88.2khz in PCM. Read somewhere that DSD is 2.8mhz which is almost 64x of 44.1khz and thought that downsampled to 4x at 176.4khz (this should be the right rate not 192, my mistake) will be nicer than downsampled to 2x at 88.2khz.

DSD and PCM require different technologies. Most hardware only works with PCM, and DSD is added for convenience. True DSD needs its own hardware. DSD doesn't "equal" 88.2khz PCM, my DX50 converts it to 96khz.

 

To quote Lothar Wiemann from T+A:

 

"DSD doesn't contain more information than PCM. An SACD delivers, per channel and second, 2.8224 Million Bits. That's slightly above PCM 96/24 (2.304 MBd) and way below PCM 24/192 (4.608 MBd)."

 

Please also note that DSD is a ONE bit format. I guess that's why your numbers don't match. + 24/192 has a higher dynamic range than DSD, so no point in converting DSD to that format when all you get is empty data and wasted storage space.


Edited by AManAnd88Keys - 5/23/14 at 7:35am
post #13280 of 18427
Quote:
Originally Posted by AManAnd88Keys View Post
 

DSD and PCM require different technologies. Most hardware only works with PCM, and DSD is added for convenience. True DSD needs its own hardware. DSD doesn't "equal" 88.2khz PCM, my DX50 converts it to 96khz.

 

To quote Lothar Wiemann from T+A:

 

"DSD doesn't contain more information than PCM. An SACD delivers, per channel and second, 2.8224 Million Bits. That's slightly above PCM 96/24 (2.304 MBd) and way below PCM 24/192 (4.608 MBd)."

 

Please also note that DSD is a ONE bit format. I guess that's why your numbers don't match.

At least it is better than 44.1,shouldn't demand more from DX50. Just to ask, any true DSD portable DAP out there?

post #13281 of 18427
Quote:
Originally Posted by burdie View Post
 

At least it is better than 44.1,shouldn't demand more from DX50. Just to ask, any true DSD portable DAP out there?


It should be better than 44.1 as long as you have appropiate phones/IEMs or speakers to hear the information it contains.

I don't know if there's a DAP that does DSD without any conversion to PCM, maybe someone else can answer that question?

post #13282 of 18427

My understanding is that AK240 does native DSD playback.

post #13283 of 18427

I'm holding on to the DX50 but I feel that the sound is rather too warm and thick with 1.2.8 firmware. Almost as if the  Highs seem to be drowned out. I'm using it with the UM Pro 30. Some people have suggested the DX90 for improved SQ but I'm wondering if the price jump is worth it. Or should I choose to upgrade the cables instead with that money?

post #13284 of 18427

Have you tried to put your IEM in the line out ?

post #13285 of 18427
Quote:
Originally Posted by smailbz View Post

I'm holding on to the DX50 but I feel that the sound is rather too warm and thick with 1.2.8 firmware. Almost as if the  Highs seem to be drowned out. I'm using it with the UM Pro 30. Some people have suggested the DX90 for improved SQ but I'm wondering if the price jump is worth it. Or should I choose to upgrade the cables instead with that money?

have you turned off the EQ?
post #13286 of 18427


Yup EQ is off. IEM in line out kind of reverses the problem. the low end disappears while the high end suddenly becomes very sharp. That said I do think my unit is working fine, probably just looking for better performance in the high end.

post #13287 of 18427
You tried to amp it?
post #13288 of 18427


Nopes running it on it's own.

post #13289 of 18427
Quote:

I'm holding on to the DX50 but I feel that the sound is rather too warm and thick with 1.2.8 firmware. Almost as if the  Highs seem to be drowned out. I'm using it with the UM Pro 30. Some people have suggested the DX90 for improved SQ but I'm wondering if the price jump is worth it. Or should I choose to upgrade the cables instead with that money?

 

Changing cables will not make the differenece you are looking for here (or indeed an amp). (continue reading)

 

reading one users view ov UM Pro 30 here (by Ostewart):

 

http://www.head-fi.org/t/697936/review-westone-um-pro30-refreshed-um3x

 

his opinion of the high frequencies seems to reinforce what you are saying.

 

Quote user Ostewart:
Highs: This is their weakness, the highs lack some presence, but the highs do extend well and are very precise and detailed. It is just they are slightly pushed behind the lows and mids, making these mildly dark sounding. They do however have more presence than the Shure SE535, and my ears have come accustomed to the slightly behind highs, and I no longer find them too bad. This does however mean that they don't become fatiguing after long listening sessions.

 

 

Before you start looking at amps or DX-90 try the UM Pro at mid gain on the DX-50 (at your IEMS 56 ohms this should be the right setting)

 

Now use the EQ to balance the sound a little, the EQ engaged does change the signature and lowers output by approx 5.5db so you need to make this up with volume increase and careful sound adjustments (the EQ is perfectly good to use!).

 

try this to start:

 

30hz: +5

180: +3

330: +1

600: 0

1K: 0

4k: 0

12k +3

16k: +6

 

 

lower the high freq' or low freq' amounts accordingly if too bright or too much low.

 

The DX-50 is a great DAP and newer firmware is just round the corner, see if what I sugested helps and make sure your music sources are good lossless well recorded/mastered references for testing.


Edited by polyrhythm - 5/23/14 at 12:06pm
post #13290 of 18427
Quote:
Originally Posted by musicheaven View Post


I used the exact instructions from the FAQ section, here is the link : http://www.head-fi.org/a/ibasso-dx50-faq#user_update

It just worked. I did use the recovery mode to perform the factory reset. Can you explain to me in steps what happened as you were following the above FAQ steps?


How exactly does the RKbatch tool work?

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