[technobear]

So does the I-purifier take digital in and make it into analogue?

https://ifi-audio.com/portfolio-view/accessory-ipurifier2/

https://www.head-fi.org/threads/ifi-ipurifier-2-reviews-impressions-and-discussion-thread.784983/

 

[jwbrent]

So does the I-purifier take digital in and make it into analogue?

Adding to the above user who left you links, the Purifier, to my understanding, filters out the RFI noise common with a computer’s USB out. The USB in on the iDSD is a digital input, but analogue conversion takes place in the digital to analogue (DAC) portion of the iDSD.

 

[Squonk12]

Feeding the BL with coax from Shanling M2

I'm going to feed mine with a Shanling MO. Except, I'm going the USB route.

 

[CoffeeDog]

So does the I-purifier take digital in and make it into analogue?

The DAC is what takes digital in and outputs analog. The DAC (such as the great one in the iDSD micro) expects the digital signal (remember that they are all actually analog signals; it's how the information is encoded into the signal that determines whether we call it "analog" or "digital") to meet certain electrical parameters, and it would like to see a perfect signal. Perfection is impossible, so the signal parameters have tolerances, plus or minus so much voltage, rise time, noise, and so on. The i-Purifier takes the signal from the source (computer, DAP, etc.) via USB and still in digital format, and then outputs the same information in the same format BUT the new signal's tolerances are (hopefully) much closer to the ideal than the original signal. The idea is that the DAC will make fewer errors when converting the digital to an analog signal if the data signal conforms more precisely to the expected standard. In other words, the iPurifier takes whatever is input to it (a USB signal) and outputs another USB signal that is identical to the first but that more closely aligns with what is accepted to be a "perfect" signal. The effective result it that turns a dirty, sloppy, ill-timed USB signal into a nice, clean, and well behaved USB signal.

 

[iFi audio]

@iFi audio A quick question - If i am on FW 5.2 and have no requirement for MQA are there any other added advantaged FW 5.30 would have over the earlier FW

FW differences revolve around functionality and not sound quality. If you don't need MQA, please feel free to stick to FW that doesn't have it.

 

[iFi audio]

Adding to the above user who left you links, the Purifier, to my understanding, filters out the RFI noise common with a computer’s USB out. The USB in on the iDSD is a digital input, but analogue conversion takes place in the digital to analogue (DAC) portion of the iDSD.

iPurifier2 is essentially a trickled down iUSB3.0. It does the same things (USB improvement) but understandably less effectively as it's more affordable.

 

[ModestMeowth]

Has anyone had issues with channel imbalance due to reasons outside of the volume pot?

I was using mine yesterday, 2017 Macbook Pro < iDSD < LCD-XC, and the left channel started getting fuzzy. I thought it might have been an Audeze driver going out. However, upon reset it seems that the left channel is noticeably quieter than the right.

 

[qsk78]

Has anyone had issues with channel imbalance due to reasons outside of the volume pot?

I was using mine yesterday, 2017 Macbook Pro < iDSD < LCD-XC, and the left channel started getting fuzzy. I thought it might have been an Audeze driver going out. However, upon reset it seems that the left channel is noticeably quieter than the right.

I think it happens in Turbo mode only, right?
No imbalance in Eco or Normal mode with my 6 BA IEM.

 

[ModestMeowth]

I think it happens in Turbo mode only, right?
No imbalance in Eco or Normal mode with my 6 BA IEM.

I'm using Turbo mode so that could be correct. Would you know how to get the channels balanced again?

 

[qsk78]

I'm using Turbo mode so that could be correct. Would you know how to get the channels balanced again?

I had the same issue with O2 amplifier, I was told that it happens with all amplifiers with such a type of the volume adjustment. Especially on the high gain.
The imbalance should disappear when the volume knob passes 9-10 o'clock, no?

 

[ModestMeowth]

I had the same issue with O2 amplifier, I was told that it happens with all amplifiers with such a type of the volume adjustment. Especially on the high gain.
The imbalance should disappear when the volume knob passes 9-10 o'clock, no?

The imbalance is independant from the volume knob so past 10 o'clock it still seems present. I say seems as it could be a mental thing.

 

[Roscoeiii]

I had the same issue with O2 amplifier, I was told that it happens with all amplifiers with such a type of the volume adjustment. Especially on the high gain.
The imbalance should disappear when the volume knob passes 9-10 o'clock, no?

I'm using Turbo mode so that could be correct. Would you know how to get the channels balanced again?

I assume you have contacted iFi support? That's how things get fixed.

 

[iFi audio]

I assume you have contacted iFi support? That's how things get fixed.

Yup!

http://support.ifi-audio.com

 

[ModestMeowth]

Yup!

http://support.ifi-audio.com

I actually just fixed the issue. The problem was that I was using a system EQ volume control called menuBus on my Mac. For some reason it was causing audio quality issues. Once uninstalled the iDSD went back to being perfect. Weird.

 

[davesday]

Hey guys, I am trying out the Micro iDSD BL with CA Atlas and I am really liking the sound. I have an iDAC2 for my desktop and I am really liking the sound hence I am considering iDSD BL for portable scenarios. However I am getting very loud pops and clicks during certain usage scenarios. The firmware is on 5.3. I am listening from my iPhone running Onkyo HF Player. I would like to check if other users are having similar experiences.

When switching to and from DSD playback, there is a very loud pop and click audible through the IEM. I understand pauses during DSD playback also creates this issue and it is player related so I worked around by setting DSD Zero Output and it seems to work ok.

Anyone able to share their experience and if a workaround exist such as going back to 5.2, etc?

Also reading from forum that pops during turning on/off appears to be unavoidable. Is that right? So far I worked around by turning it on and keep at low volume before plugging any headphones in. And similarly plugging off before turning it off.