MQA - One Filter to Rule them All?


Hi Everyone,

Just thought I'd start another flame....er, discussion. I've been reading some about MQA.  It has several components, but I want to focus on one in particular. The digital filter compensation.

The other two parts are compression and authentication.

We don't have a lot of DAC's to listen to with MQA right now, but here's my understanding.

By measuring time or amplitude errors in ADC's AND DAC's MQA seeks to correct the behavior, making the entire A/D --> D/A chain closer to ideal. It's pretty ambitious. What I'm wondering is, assuming this is real and not snake oil, does this mean all MQA DAC's will begin to sound alike? Will otherwise mediocre DAC's step up, and great DAC's not have that much to contribute anymore?

If so, maybe this will usher in another great era of tone controls being built into our preamps or DAC's instead of having to make tonal changes via cables and tweaks.

What say you? Assuming MQA is not snake oil, (could be, haven't heard it) doesn't it mean all DAC's will sound the same?

Best,


Erik
erik_squires
Hi @bombaywalla

Haha, I don’t have that kind of cash flow, and I’m not the biggest BAD fanboy. I like them a lot, but overall I think I prefer warmer sound.

According to what I read online, yes, Mytek did in fact submit the DAC’s for approval, or measurement or whatever. I’m not sure how it works, or what exactly they must measure. It sounds like a pain in the butt honestly. I doubt every applicant has the same or appropriate measurement devices, so this must mean that Mytek has to submit the DAC somehow, get Meridian to measure it, and provide refreshed code or coefficients, have those implemented, and re-measure. What a mess.

As I understand it, they measure the behavior of the entire DAC, not just the chip. It would be really convenient if it was just per chip so there’s just one set of adjustments for a BB 20459 (or whatever). This is one reason why I read Schiit is not on the bandwagon (among others). Perhaps in the future as they get more experience this is how things will go, so it will make it a lot easier for small-volume makers to get pre-approved decoding.

It may even be possible MQA decoding will be build into streamers, so you can configure your steamer and say "My DAC uses an AKxxxx chip" and voila. Then you could be all Schiit happy and have MQA. On the other hand, once the type of benefit is known (if any), maybe an open-source DAC adapter will be written which can provide at least the proper de-coding adjustment.  That is, if Meridian is measuring something like a pre-ringing filter, adjusting for that in the stream could be done by others without stealing their code, just the idea.

After the Alpha with MQA comes out maybe i’ll find a fellow San Francisco Bay audiophile to bring it and compare though. Right now I am just hoping for construction to finish so I can finish breaking in the Brooklyn. :)

Best,


Erik
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I believe Meridian has a $399 MQA Dac and a $22,000 MQA player.  I doubt they sound the same.
@tomcy6 I wonder. ;)  Im far too jaded to believe in price being completely tied to performance.

Good to know about a bargain player. 

thanks!!
Any electronic device still needs passive components (LRC). That means lots of room for quality or lack thereof. So yes, there will still be an opportunity for costlier units to sound better.