[bluenight]

Can someone do me a favour and connect your idsd bl to you tv with optical and see if it can handle all various hdmi sources connected to the tv like chromecast, set top boxes, game consoles. Then i will know if my unit is faulty or if this is the way with all units so i dont have to try another unit unnecessarily.

As i have said, on my lg oled b6 tv it only works flawless with the built in apps, where the other sources connected with hdmi loose the sound for a second to come back and that happens from time to time.

@iFi audio what you think of this?
And i wonder do you do alot of testings on your dacs that have optical connections when developing them and test that they can handle various sources, like computers, smartphones, and tvs?
I especially wonder about testings with tvs and sources connected to them. I think many buy dacs for tvs these days.

And if you do not have those routines for your dacs, i hope ifi will start to have those routines for testing that the dac can handle all various sources connected to the tv.

 

[technobear]

I've never experienced a problem with my TV optical out to the iDSD when using other sources, those being my computer and my PVR.

 

[bluenight]

I've never experienced a problem with my TV optical out to the iDSD when using other sources, those being my computer and my PVR.

Alright thanks. Maybe its my tv that has an unlucky compability with the idsd bl or the unit is faulty which i doubt because it prove it can handle at least the pcm singnal flawless from the built in apps. I think its a bit strange.

Never had this issue with my previous fiio dac using same optical cable connected to the tv.

 

[iFi audio]

Alright thanks. Maybe its my tv that has an unlucky compability with the idsd bl or the unit is faulty which i doubt because it prove it can handle at least the pcm singnal flawless from the built in apps. I think its a bit strange.

Never had this issue with my previous fiio dac using same optical cable connected to the tv.

Please check whether the 3.5mm adapter is correctly attached and locked in the socket.

If this reliably the case, please use our Support Ticket System, to be found here: http://support.ifi-audio.com

 

[iFi audio]

I agree, so perhaps you can tell me where I'm going wrong (and I genuinely hope you will be able to do so). The file I used for all 3 test was this white noise wav https://www.dropbox.com/s/ju3sgtiubihftl5/White_PN_65536_48000_1_24000.wav?dl=0

You'll see that I made 2 posts regarding this matter. This first graph was with the wav file being played through the iDSD BL connected to my Hidizs AP60 as the source.
The second post showed the response of that exact same wav file being played through the iDSD via USB and Foobar2000 as the app from my desktop.
And the 3rd graph showed the response of that same wav file being played through the iDSD via optical from my desktop, and again Foobar2000 used as the app.

Does the fact that I'm getting the same strange response when using USB as the input to the iDSD BL from 2 DIFFERENT SOURCES not indicate that there is indeed an issue on the USB side for my device?

We already have commented that the cause is external to iDSD micro, because of the fundamental design of this product. Processing is added somewhere in your recording playback or recording chain.

Others have performed similar measurements before also getting incorrect results. Still, some folks got them correct (e.g. here: https://www.head-fi.org/f/threads/ifi-micro-idsd-black-label-in-depth-review.833933/). We advise you to peruse the archives.

If there is no digital domain signal manipulation before the signal is applied to iDSD micro, there is absolutely no measurable difference (within the confidence limits of the Audio Precision System Two we use for testing) between USB and SPDIF signals delivered at the analogue outputs of the iDSD micro.

Past that, we cannot be expected to trouble-shoot your measurement setup. That's on you

However, to repeat, the result you're getting is ONLY and STRICTLY possible if:

A) The data is altered (usually sample rate conversion by Windows, OSX or Linux) by the playback setup prior to being sent to the iDSD micro via USB.

B) The recorded is being altered (usually sample rate conversion by Windows, OSX or Linux) when recording to the same PC used for playback (likely) or different PC (less likely) using USB connected recording devices.

If you'd like to have authoritative and reliable measurements, you should rely on solid and proven test hardware, like Prism 'dscope or Audio Precision System Two or similar.

 

[bluenight]

Please check whether the 3.5mm adapter is correctly attached and locked in the socket.

If this reliably the case, please use our Support Ticket System, to be found here: http://support.ifi-audio.com

I am sure the 3,5 mm is correctly connected. And i have sent ifi a support ticket already.

 

[bluenight]

When the sound works they really make my hd 650 sound very detailed and clear and at the same time not harsh, never heard voices this clear. Has great soundstage. Bass digs deep to. All in all very good sound quaility could be end game level for me. But i cant keep it because the way it looses the sound from time to time with optical to my tv. I hope the store let me try another one to see if mine is faulty or i get my money back.

And maybe wait for the next ifi micro idsd release, i hope ifi puts in spdif galvanic isolation on that one. Like they did on the ione.

 

[iFi audio]

But i cant keep it because the way it looses the sound from time to time with optical to my tv. I hope the store let me try another one to see if mine is faulty or i get my money back.

Do you have the possibility to try a different optical input? Also, as remarked before, because you need an adapter, it's possible that it's not attached in 100%. It needs to be correctly mated with used optical cable in order to work in 100% reliably.

Another thing is that the TV might have some form of digital processing on, be it delay compensation or other DSP.

Past that, if you use an optical cable, your SPDIF is galvanicaly isolated - for the optical input there is no relevant difference between the iOne nano and iDSD micro, both use the same circuit etc.

 

[bluenight]

Do you have the possibility to try a different optical input? Also, as remarked before, because you need an adapter, it's possible that it's not attached in 100%. It needs to be correctly mated with used optical cable in order to work in 100% reliably.

Another thing is that the TV might have some form of digital processing on, be it delay compensation or other DSP.

Past that, if you use an optical cable, your SPDIF is galvanicaly isolated - for the optical input there is no relevant difference between the iOne nano and iDSD micro, both use the same circuit etc.

I have only one optical cable at home and it works fine with my tv when using with an fiio do3k basic dac. And for the idsd the adaptor snaps on very well on to my optical cable. And i push the mini connection all the way in on to idsd. And it works fine with the built in tv apps only and not with hdmi sources.

 

[bluenight]

Do you have the possibility to try a different optical input?

Yeah tried the idsd bl with optical to my computer and it worked flawless there. Used the same optical cable used to my tv. So have to be some compability isues when using hdmi sources on my lg b6 oled tv.

Also have tried an chord hugo for two weeks to my tv with optical and it had no sound dropping isues no mather what source.

 

[cardeli22]

Not sure where I should put this but the BL is on sale on Adorama.com via the slick deals link for 379$: https://slickdeals.net/f/10293720-i...dac-and-headphone-amplifier-380-free-shipping

 

[Dobrescu George]

Not sure where I should put this but the BL is on sale on Adorama.com via the slick deals link for 379$: https://slickdeals.net/f/10293720-i...dac-and-headphone-amplifier-380-free-shipping

That looks like such a sweet deal!

It is worth every penny at its full price, having a discount makes things even cooler!

 

[cardeli22]

lol, sadly i just got it last month for 469$ brand new sealed on Ebay. Still a great deal vs the normal price.

 

[cardeli22]

That looks like such a sweet deal!

It is worth every penny at its full price, having a discount makes things even cooler!

Yeah it is! I am using it with the AKG7XX, and the MH40s. I got to demo it with the 1770pro and the 1990pro at Audio46 in NYC. Really enjoyed both but am leaning towards getting the 1990pro.

 

[harrinj]

Does anybody know how to fix this annoying problem or has run into this yourself..I have the black label and my LG V20 charges this DAC and I cannot listen to it for more than about an hour maybe hour and a half until my phone is completely dead. I turn the black label on before I connect it but that does not make a difference and the DAC is fully charged before. If anybody has this problem too and knows how to make android NOT become a power supply, let me know please! There's no settings to turn it off phone wise that I can see.