[Triodemode]

   
I think you might have misunderstood what 'bit perfect' filter means in micro DSD - it means 'non-oversampling' (NOS) actually, which isn't the same as what that article is talking.

My understanding was the article linked was speaking about bit perfect relationships between software and hardware. I thought all three modes on the micro iDSD were just different filters without any oversampling.   Is this correct?

 

[ClieOS]

   
Did you experience volume change when playing DSD, and switch the Filter switch from Bit-Perfect to Minimum Phase, then to Standard?
I hear volume is increasing, like around 2-3 dB when switching from Bit-Perfect to Minimum Phase. And around 1-2 dB increase when switching from Minimum Phase to Standard.
Is it normal?
 
Thanks!

In DSD playback, the filter selection is referred as Extreme / Extended / Standard Range (analogue) filters instead of Bit Perfect / Minimum Phase / STD. I don't actually play with DSD much so I haven't really noticed anything.
   
Quote:

 
My understanding was the article linked was speaking about bit perfect relationships between software and hardware. I thought all three modes on the micro iDSD were just different filters without any oversampling.   Is this correct?

 
Standard and minimum phase filter are oversampling (depends on your software / OS setting), Bit perfect is NOS. It is not exactly a filter as NOS doesn't have any filter.

 

[maricius]

 

 
Very handsome pairing in the DX90 + CL Duet and great sound too… too bad this set-up sounds better… I'll give the DX90 + Duet rig another chance tomorrow
 

 

[earfonia]

  When you change the filters for DSD you are changing the analog filters, a different set from the digital filters for PCM. The term Bit-Perfect, Minimum Phase and Standard does not apply to DSD.

 
Right, so the extra gain should be from the analog filters. Tx!
 
 

   
In DSD playback, the filter selection is referred as Extreme / Extended / Standard Range (analogue) filters instead of Bit Perfect / Minimum Phase / STD. I don't actually play with DSD much so I haven't really noticed anything.

 
Noted thanks!

 

[Krutsch]

   
Standard and minimum phase filter are oversampling (depends on your software / OS setting), Bit perfect is NOS. It is not exactly a filter as NOS doesn't have any filter.

 
Wait, what?  Do you mean "in general" or as implemented in the iDSD Micro?  If it's the latter, the filters are implemented entirely within the device, are they not?

 

[ClieOS]

   
Wait, what?  Do you mean "in general" or as implemented in the iDSD Micro?  If it's the latter, the filters are implemented entirely within the device, are they not?

 
Well, if you set the Windows to output 16/44.1 by default then obviously there won't be any oversampling. The filters are capable of oversampling, but you have to tell it to oversampling in the first place. Or else it would have to upsample everything, which isn't the case here.

 

[iFi audio]

A big welcome!

 
Dear All,

 
It took us longer than expected but we are almost there.

 
http://ifi-audio.com/iclub_blog/iclub-a-big-welcome/

 
If you have not, then please hurry and register your Octa-unit here as we have made contact with 95% of the 512 customers and other customers as nominated by our senior staff (they are allocated a certain amount of nominations per quarter).

 
We would like to introduce our "fantastic five" concierges - Karina, Linda, Owen, Laura and Kate. between them, they look after retail network which spans North America, Europe and Asia.

 
See you at the iClub!

 
Yours sincerely,

 
iFi staff and directors.

 

 
ps: a very nice gift is coming in the next few days...


 

 

[Krutsch]

   
Well, if you set the Windows to output 16/44.1 by default then obviously there won't be any oversampling. The filters are capable of oversampling, but you have to tell it to oversampling in the first place. Or else it would have to upsample everything, which isn't the case here.

The filters selected with the button on the side of the iDSD Micro should control the application of "standard" (linear?) or "minimum" digital filters *entirely* within the iDSD Micro; oversampling occurs within the DAC using the selected filter (or none of this, if "bit perfect" is selected).  Whatever settings you apply on your Windows or Mac are irrelevant, unless you are already up-sampling to the limits of the device (PCM 768?), for example using your playback software's upsampling function (e.g. Audirvana's use of iZotope).

 

[ClieOS]

 
The filters selected with the button on the side of the iDSD Micro should control the application of "standard" (linear?) or "minimum" digital filters *entirely* within the iDSD Micro; oversampling occurs within the DAC using the selected filter (or none of this, if "bit perfect" is selected).  Whatever settings you apply on your Windows or Mac are irrelevant, unless you are already up-sampling to the limits of the device (PCM 768?), for example using your playback software's upsampling function (e.g. Audirvana's use of iZotope).

 
I know what you are talking about, but we are not actually talking about the same thing so it is kind of pointless here. Just want to add that Bit Perfect is NOS, and by definition, NOS doesn't have a filter. That's all.

 

[earfonia]

 

A big welcome!

 
Dear All,

 
It took us longer than expected but we are almost there.

 
http://ifi-audio.com/iclub_blog/iclub-a-big-welcome/

 
If you have not, then please hurry and register your Octa-unit here as we have made contact with 95% of the 512 customers and other customers as nominated by our senior staff (they are allocated a certain amount of nominations per quarter).

 
We would like to introduce our "fantastic five" concierges - Karina, Linda, Owen, Laura and Kate. between them, they look after retail network which spans North America, Europe and Asia.

 
See you at the iClub!

 
Yours sincerely,

 
iFi staff and directors.

 

 
ps: a very nice gift is coming in the next few days...
 
 
 

 
Registration of the Octa-unit is through the normal product registration page right?
After that then just wait for invitation right?
 
Is there any indication of the unit number from the serial number?
My Micro iDSD serial number is microD20711
Tx!

 

[iFi audio]

 
 
Registration of the Octa-unit is through the normal product registration page right?
After that then just wait for invitation right?

 
Is there any indication of the unit number from the serial number?
My Micro iDSD serial number is microD20711
Tx!

Hi,
 
This was for the Octa-Adopter unit owners. So the serial numbers with microD1xxxx. There were 512 of them around the globe.
 
There will be another membership opening in the not too distant future to invite new members.
 
The membership openings come around periodically.
 
The other option is that senior staff are allocated a certain number of nominations each quarter.
 
Hope this sheds more light.
 
Thanks.

 

[asintado08]

 
 

 
Very handsome pairing in the DX90 + CL Duet and great sound too… too bad this set-up sounds better… I'll give the DX90 + Duet rig another chance tomorrow
 

Do you have a high impedance HPs? I am considering a DX90/Duet, a iDSD micro or a Theorem 720. I will use it with a HD 650. 

 

[maricius]

Do you have a high impedance HPs? I am considering a DX90/Duet, a iDSD micro or a Theorem 720. I will use it with a HD 650. 

The find the iDSD micro to be better than the other two combos in technicalities but I'm unsure of synergy with the HD650. In terms of power, Micro iDSD > Duet > Theorem.

 

[Triodemode]

The find the iDSD micro to be better than the other two combos in technicalities but I'm unsure of synergy with the HD650. In terms of power, Micro iDSD > Duet > Theorem.

I have yet to see another 'portable' headphone amp with the drive capability and versatility of a micro iDSD.  My HD650 plays beautifully using the micro iDSD in ECO mode.  The 650 can be a bit dark sounding on some source material, and I find using the 3D option gives a nice subtle high frequency boost with these files.

 

[Memorexx168]

Does anyone uses the ifi with an iPhone? I listened to spotify for like an hour. Suddenly my iPhone is down to 50% battery

What?!?!

Does the iPhone charge the ifi? Maybe it drains all the power and transfers it to the ifi....
Any advice?