Airlens - DSD/DSF Crackles

Hi, Just got Airlens. What can I say, its super…BUT I noticed crackes in the backgroung when playing DSD/DSF ( Via Roon).

Prior to Airlens I was using Matrix Xspdif-2 > I2s. Did not have crackling occureces ( apart from at the beggining of track-sometimes)

But now I have them in background, clearly audible when quiet passages come.

Is there anything I can do? There are no longer options to increase buffer size in Roon. I tried all other settings, made no difference ( I2S).

Please help, maybe this could be fixed via firmware update/s?

Many thanks in advance

Just a thought for a brand new unit, I’d discuss your experience with your sales rep after confirming all cables/PCs, etc are firmly seated. I have no experience with the Air Lens, as I went with Innuos. The Innuos is quiet as a still cold clear fall country night.


thans for your thought. I got unit today. Cables are all fine. I’ve used I2s for many years…

It’s brand new to the market so I thought I’d reach out to AL owners and beta testers…

As I sa it could be something that perhaps can be rectified through firmware update.

I would make sure firmware up to date. DAC too. If you have MKI I am sure you are on latest. I did not have any of these issues when I had the AL in my system. If it keeps up I would call the company.


Hi, thanks. Yes all up to date. Using (heavily ) modded MK1 / sunlight . No prior issues with Matrix I2S interface.

Hope PS technical picks this thread up and review. Cheers…


@jamesh Someone needs some help…

FYI, from what @Elk has posted in the past PSA tech support typically does not check the forum for customer questions or requests for technical support. There was a time when Ted did, but he’s been away from the forum as he’s working on the DSD Mk2 FW upgrade. Also, Ted’s focus is DSD FW questions. If forum members that have an AL don’t provide suggestions to a solution your best avenue is a call to technical support followed up with an email to ensure your question does not fall through the cracks. Just trying to provide some meaningful guidance.


I would check the DIP switches on the bottom of the AirLens. They are supposed to come from the factory all in the up position, which is appropriate for PSA DS DACs. If you have another brand they might need changing. See the manual for the settings involved.

I just played two DSD files (one 64, one 256) via the AirLens to my DS Mk2 and heard no crackling sounds.

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Thank you. They are already all in ‘up’ position.

Hi Everyone. Just to let yu know, I swapped my AQ Firebird HDMI with cable supplied iwith AL and it appears that crackling has gone…

I dont quite understand, AQ Firebird is"better" cable, but ( so far) stock PS I2S cable works better in my system. BTW AQ Firebird worked without fault with Matrix Xspdif2 interface… :thinking:

I hope this helps somebody else experiencing same issue. It appears that AL is extremely sensitive to cabling used…

I will test for few days before closing issue.

Can anyone reach out with I2S cables they are using in ALsetup withhout problems.



I am using AQ Thunderbird 48 without issues. I did not try the stock HDMI cable.

thanks for your feedback.

which hdmi cable are you using? I got rid of clicks by using free PS audio cable…

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If you put that AQ back and it has issues, maybe contact AQ and they will swap out… worth a try.

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Thanks Brian,

It maybe because this cable is 90cm, which apparently is not ideal for I2S.

Also, I made mistake, it’s AQ cinnamon, not firebird.

Enc ps audio cable audio Woking fine, but sounds a bit ‘muffled’. I will need to look at alternatives, any suggestions, up to around USD200/m ?


When I first got my PST, I was using the PSA-supplied HDMI cable that I got years ago; it looks identical to the one that came with the AirLens, although I can’t comment on the internal construction. I found that upgrading this cable made a noticeable improvement, which would match your description of it as slightly muffled.

Right now I am using a Tubulus Concentus I2S cable from the AirLens to the DS Mk2 (paired with a Tubulus Concentus power cable to the AirLens). I am pleased with the TC I2S cable ($700), although I haven’t had the opportunity to compare it against the really expensive AudioQuest ones. No noise issues and overall very good SQ.

Note that this cable presents one slight issue: the HDMI connectors are slightly larger than usual. If you plug it into the AirLens or the DS DAC I2S outlets, it won’t seat properly because it bumps into two round-head screws that are close to the outlets. You just replace these with wafer-head screws, which I had no problem doing.

Edit/Addendum: I have a sneaking suspicion that this is a Roon issue (strange that a cable change fixed it, though). I know you said you tried the various settings with no change. But software like JRiver and Roon do things behind the scenes that are sometimes hard to ferret out (one of the reasons I don’t use them). Maybe some other Roon users can help.

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Thanks for suggestions. I will definitely be looking into HDMI upgrade. @USD700 this would be almost half the price of AL, so I will probably start with AQ Carbon and work my way up. Thanks again.

Thats 1M. That is perfect in my book. Yeah firebird is quite a bit more. RAL cables are under that price and used even better.

I don’t mind used cables at all; In my view they are just properly run in…

Any suggestions around $300

Thanks Dan


Used RAL is about $400 ish. Wireworld has some in that range that will do nice job.