miero
Active Member
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- Aug 1, 2018
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@WolfX-700 thanks for the measuring noise floor. To me it seems that most of distortion (IMD hump too) will be close to the (summed) noise floor.
Yes. That's why I attached my measurements since the ESS hump only deteriorates IMD measurements at mid levels. At high levels the ESS wins of course. BTW that 2005 soundcard uses CS4382.
Can't please everyone. Measure one unit: small sample size! Two measurements of same device: waste of resources!I agree. This seems to be adding more work for @amirm as he's getting drawn into a comparison after he's finished the normal amount of work he would need to do for a review. It's obviously better for us but it seems like Amir's time is already stretched with the number of reviews he does.
I agree but maybe @pozz can link the reviews when they are for the same product, precisely for the reasons you mention.I think an independent review by an independent source is a better verification of the same manufacturer and unit.
If a manufacturer has serious problems in quality control, etc., it is easy to find such multiple independent measurements.
IMO This will help improve ASR's overall reputation.
So it's not completely obvious because of the format, but until we make an a interactive version the way it works is that you can look up the device and the updates I know about in the master review index:I agree but maybe @pozz can link the reviews when they are for the same product, precisely for the reasons you mention.
To this end ASR developing standardized methods for review measurements that are to be published here would be of great benefit to.
There's a bit to sort out so we maximise the value and respect the effort you are putting in.
Again @WolfX-700 ,I have huge admiration for the selfless, open and egoless way you have conducted yourself here and thank you for the great work you doing.
Just don't get more likes than Amirm , else I will have to listen to all the crying behind the scenes. He's already jealous of your wolf's , clearly they would eat the pink panthers for breakfast.
This got me wondering, based on yours and Amir's SMPTE curve, its best results are around -5dB signal level ? ( if I understood that correctly that is, as I don't completely understand this concept even though I have read AP's own FAQ on the subject : https://www.ap.com/technical-library/more-about-imd/ ), so would the above at -5dB be relevant in this case ? As I normally leave my DAC output at close to 0 dB anyway.
So it's not completely obvious because of the format, but until we make an a interactive version the way it works is that you can look up the device and the updates I know about in the master review index:
Issue is that I can't follow every debate and update, which is why I've asked reviewers to PM me anytime they have something new to submit.
- (25 March 2018) Massdrop Grace Design SDAC & JDS Labs OL DAC & (15 August 2019) Update
- (19 March 2018) Topping D10 & (15 September 2018) Op-Amp Rolling & (7 March 2019) Update
- (13 July 2018) Schiit Jotunheim Multibit & (16 July 2018) Fixing Hum/Buzz Issues & (25 January 2019) Schiit Jotunheim (AK4490)
- (24 June 2018) Benchmark DAC3 DX & (24 June 2018) Headphone Output & (24 June 2018) Update
- (1 February 2018) Emotiva DC-1 & (2 February 2018) Teardown & (2 February 2018) Headphone Output
Since real music has varying amplitude so this value can vary as well.This got me wondering, based on yours and Amir's SMPTE curve, its best results are around -5dB signal level ? ( if I understood that correctly that is, as I don't completely understand this concept even though I have read AP's own FAQ on the subject : https://www.ap.com/technical-library/more-about-imd/ ), so would the above at -5dB be relevant in this case ? As I normally leave my DAC output at close to 0 dB anyway.
Amirm, I'm not familiar with the term rotary encoder, can't recall you calling that out before. What is significance of that component? Beautiful unit.The volume control is a rotary encoder. The ring around it indicates volume level. I sort of expected a numerical display to the left of it. You can easily set the input and filter types by how long you push the encoder in, and then rotating it.
Thanks for the review amirm and Mr Wolf. (Pulp fiction anyone?)
This hump. I realise to those who are seeking a higher standard it's unsatisfactory given some units don't exhibit it, but what if anything would one hear when such a hump is present?
Would it be possible to run THD vs. freq with a square signal at -1dBFS? It could show how much dynamic headroom is there on a DAC.0dB is maximum value of a sampled point, but "true peak" or "intersample over" of the recording could be much higher:
- https://techblog.izotope.com/2015/08/24/true-peak-detection/
- https://www.audiosciencereview.com/forum/index.php?threads/intersample-over-test.3730/
- http://www.analog-precision.com/Dow...rsample_Overs_using_the_Intersample_Guard.pdf
For example 20kHz square wave at 0dBFS sampled at 44100kHz contains intersample overs with +8.15dB amplitude. These will be generated during oversampling in the DAC.
I agree but maybe @pozz can link the reviews when they are for the same product, precisely for the reasons you mention.
To this end ASR developing standardized methods for review measurements that are to be published here would be of great benefit to.
There's a bit to sort out so we maximise the value and respect the effort you are putting in.
Again @WolfX-700 ,I have huge admiration for the selfless, open and egoless way you have conducted yourself here and thank you for the great work you doing.
Just don't get more likes than Amirm , else I will have to listen to all the crying behind the scenes. He's already jealous of your wolf's , clearly they would eat the pink panthers for breakfast.
You may find this interesting:Would it be possible to run THD vs. freq with a square signal at -1dBFS? It could show how much dynamic headroom is there on a DAC.
I am aware this is not a valid signal that could be recorded by ADC, but in a world of compressed music this happens, unfortunatelly.