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iFi Audio Nano iDSD discussion + impression - Page 34

post #496 of 1720

Would this work with a galaxy s4 android 4.4.2, also how does it work does it use usb1.1 when connected to an andriod device and does it draw power?.

post #497 of 1720
Quote:
Originally Posted by JRG1990 View Post
 

Would this work with a galaxy s4 android 4.4.2, also how does it work does it use usb1.1 when connected to an andriod device and does it draw power?.

 

 

Hi,

 

On the ifi website you can open a support/tech ticket and one of the guys will email you the pdf of the Android info.

 

thanks

post #498 of 1720

Can someone point me to a tryout for DSD256 files...   so far the updated firmware is working fine for me...

just need a couple files in DSD256 to try out...

post #499 of 1720
Quote:
Originally Posted by GradoSound View Post
 

Did anyone manage to install iDSD Win driver (v2.20.0) under 64b Win7? I was able to install the previous version (v2.19.0) before but not the new version. It looks like the new driver was compiled for 32b exclusively and Win7 message was to "contact the software provider to get the correct Win version". This is on Mac Mini (2011) bootcamp. Strange.

 

Also, do I need to open a service ticket to roll back to the previous firmware or can I download it from Web?

 

OK, I got to the bottom of this Win7 driver setup issue. I'll explain in a rare case it helps someone else too.

 

My main daily PC is my Macbook Pro. I do my emails, downloads, general surfing etc on this machine. As usual I downloaded iDSD Nano Win driver on this PC as well. Somehow I got a corrupted exe file although I downloaded it twice. Not knowing this I copied the driver file to my Mac mini bootcamp Win7 computer. During the setup Windows (as usual) gave a very misleading message suggesting to use the correct Windows version (32/64b). After downloading the iDSD audio driver file from the Win7 itself it installed without any issues.

 

Originally I used Google Chrome under Mavericks. I copy files between Macs and Win machines without any issues for years and this is the first time it's happening. 

 

Thanks for the suggestions.

post #500 of 1720
iRack stack

post #501 of 1720

Ok, I've got good news and bad news.

 

First, the good news.  The new firmware + driver makes the iDSD nano run fine on my Lenovo Helix which has USB 3.0 ports.  Previously, I had to either downgrade them to USB 2.0 or use a USB 2.0 hub.  Now, it works fine without it.

 

Bad news?  The ASIO buffer on the control panel is too small when I use it with JRiver 19's PCM -> DSD128.  Even when I set it to "Low" / 8192 samples buffer size, it stutters quite badly.  DSD64 is fine.

 

Can I request the buffer size be increased to at least 16k samples, if not 64k samples?

post #502 of 1720
Quote:
Originally Posted by Watcherq View Post

 

Bad news?  The ASIO buffer on the control panel is too small when I use it with JRiver 19's PCM -> DSD128.  Even when I set it to "Low" / 8192 samples buffer size, it stutters quite badly.  DSD64 is fine.

 

Can I request the buffer size be increased to at least 16k samples, if not 64k samples?

+1

 

I got the same impression.

post #503 of 1720

Only certain USB streaming modes work well on my system. Safe seems to be the default and there is seven settings.  For example the relaxed mode the sound will cut out or stutter. Low Latency will work but I get a waring on low buffers regardless of buffer size but found no issues. I am leaving the USB streaming mode on Reliable for the time being and it is very quiet during mode switching.Too large a buffer size you might run into issues with lip sync when watching videos. I have tried DXD files without any issues. 4xDSD files are harder to find. If you are using J.River for windows what is your benchmark scores found under Help?   The more I listen the more DSD files and native 2xDSD streaming processing from PCM to DSD shines on the Nano iDSD. I am impressed.

post #504 of 1720
Quote:
Originally Posted by john57 View Post
 

The more I listen the more DSD files and native 2xDSD streaming processing from PCM to DSD shines on the Nano iDSD. I am impressed.

 

Yes, after three weeks of daily use my iDSD Nano is fully broken in now and PCM to 2xDSD up-sampling in JRiver Mac sounds like a high end tube amp! Warm and very detailed.

post #505 of 1720

I was experimenting with the sound samples on the 2L web site. I was playing back DXD and DSD128 files with a Jazz piece called Quiet Winter Nights.   

I came with a few conclusions. J.River real-time conversion from DXD to 2xDSD is lousy as compared to the 2L DXD masters. 2L DSD128 samples comes from their DXD masters and works much better. The DXD file was a bit more laid back and softer even. The DSD128 sample was a bit more forward and more dynamic. The piano in the DSD128 file sound more like a piano and less harpsichord sounding.  That good news to me and confirms that DSD128 is the sweet spot for me regarding file size and quality. 

post #506 of 1720

Ok further analysis on the "bad news" that I had posted.  It seems that it samples count is literally that; for DSD, the warning comes very quickly given its nature.  Let me elaborate.  Using files, DXD and DSD from 2L.com, I run through the combo.  Using DXD, setting "Reliable/8k" showed no warning.  However, DSD64 (aka 2.8MHz) gave the warning.  I had to lower the streaming mode to "Low" to get rid of the message.  That implies that the device or driver literally sees the bitstream per bit as a sample.

 

However when the same DSD files is wrapped in DoP, there is no warning at "Reliable/8k"!  This is true all the way to DSD128 upsampling of PCM files.

 

I think iFi needs more work on the direct DSD portion (ie without DoP) to eliminate this bug.


Edited by Watcherq - 5/15/14 at 7:35pm
post #507 of 1720

Hi, 

 

Totally new at this. Didn't even know that audio file was converted before it gets to my ears lol. But I ordered one and it's on the way; while waiting, I am planning to pick up a pair of cans that can complement this little device. Been eyeing at Sennheiser HD598, would that be a great choice, and is there a better choice? I listen mostly to classical acoustic guitar and pop music, with budget under $400. I am planning to hook this DAC up with my laptop or maybe samsung s4 with no extra amp, will the 80mW output enough to be used with headphone with higher impedance, say DT-990 250 ohm?

 

Thanks 

post #508 of 1720
Quote:
Originally Posted by Watcherq View Post
 

Ok further analysis on the "bad news" that I had posted.  It seems that it samples count is literally that; for DSD, the warning comes very quickly given its nature.  Let me elaborate.  Using files, DXD and DSD from 2L.com, I run through the combo.  Using DXD, setting "Reliable/8k" showed no warning.  However, DSD64 (aka 2.8MHz) gave the warning.  I had to lower the streaming mode to "Low" to get rid of the message.  That implies that the device or driver literally sees the bitstream per bit as a sample.

 

However when the same DSD files is wrapped in DoP, there is no warning at "Reliable/8k"!  This is true all the way to DSD128 upsampling of PCM files.

 

I think iFi needs more work on the direct DSD portion (ie without DoP) to eliminate this bug.

Do you hear the issues when playing the files? I disregard the warning unless I am hearing the issue. I noticed that relaxed mode will really make a mess. I am trying the standard mode for long term testing at 2048 samples. No issues so far except I still get the warning. I even set the buffers to 64 samples, no problem that I can hear. I think that for now the warning is not very accurate for DSD. Pure DSD streaming may not have a large need for buffers and the signal then just goes straight to the analog filter without much need for processing by the chip.  The reason I am thinking  this way is that if I get the warning at buffer size of 4096 for DSD then when I switch the buffer to 64 the sound should breakup but it does not. When I tried the same thing with DXD the sound will definitely breakup at 64 samples. It seems to me that PCM and DXD have a bigger need for buffers for processing by the chip as compared to DSD. I am trying to extrapolate this information without having the background  info on how the Nano iDSD is setup but I am going by the behavior of the device.

The reason I am using 2048 for buffer size is that I start losing lip syn in video playback at buffer size of 4096 or greater.  It will take me a few days of testing with the Nano iDSD with my pro audio and video editing applications and see if the Nano is up to the task. I may use the low latency mode for this kind of work. I will try many different situations with the Nano and see if I can find its  limit for this kind of work, so far no show stoppers.


Edited by john57 - 5/17/14 at 6:46pm
post #509 of 1720

Yes, I heard clicks, stutters and tremors in the music.  Mind you I'm testing this on a 3+ year old x201t.  When I was trying out yesterday and was trying to see if I can find the Windows registry entry to hack the buffer, it gave even more clicks and pops.  It becomes worse as you set the Streaming mode to be more aggressive.

post #510 of 1720

 

 

I reset my DEP is  for only Windows system components and services. Keep my startup files to a  minimum.

Changed Win7 setting from applications to  background services take priority.

This is a very important step if you use J.River, set this buffer for 500 milliseconds. This idea came from Schiit for their Loki DSD DAC.  This has totally eliminated all skips and stuttering even when using 64 samples. The only time I get stuttering is from PCM to 2xDSD real-time conversion at 64 samples. I think that I did a good job of getting the most of the AMD Phenom II X4 955 chip. I strongly recommended to everyone to try this buffer setting. The downside is that things like volume control can be sluggish. My workaround is to use the control pot on the nano DSD as a limiter and not to use J.River volume control     

 

I am a happy camper! More wonders when the micro comes out!

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