This seems to be along the lines I have thought about because every time I can lower THD, it gets more accurate sounding. As I suggested earlier, we may be measuring ultra low THD changes but that is not necessarily the level of distortion which is heard when music is played.
Thus I showed this data. We can measure THD to very low levels but may be hearing other things related to IMD.
We maybe measuring way down there but hearing something way up here. 🙂 Scientific speak.
THx-RNMarsh
There's a lot of good stuff in here, between the goop and bybees... JN's speaker ideas, Pavel's tests... many more!
And for an uplifting break, look into BBC2's the Repair Shop on iPlayer... It's a great program. Tonight's included restoration of a Portuguese Guitar...
And for an uplifting break, look into BBC2's the Repair Shop on iPlayer... It's a great program. Tonight's included restoration of a Portuguese Guitar...
It was Skinner's and after a little research he was actually the house near by 11 Dee Road, I must have misunderstood the realtor. Checking Google maps the Corbusier house we looked at is still there, hard to believe since it needed a lot of work and was strange.
I did know one of Chomsky's proteges, one of the few people who had their tenure revoked at MIT for passing joints in class.
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@Mark: If you can put together a DAC where the registers can be changed and check that you can hear this difference with that exact board (and note the settings and music used) then we have a starting point.
The challenge then is agreeing what needs to be measured and how. That is where I would have to defer to those more experienced in the art.
The challenge then is agreeing what needs to be measured and how. That is where I would have to defer to those more experienced in the art.
Speaking of cows my fav Steve Albini incarnation is Big Black. He was fond of wearing a Die Kreuzen t-shirt.
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I vote the direction of, "(insert personality here) is going to say what (insert personality here) is going to say". It's not like new ground is getting covered.
Yes, "Songs About *******" was one of my favorite albums at the time. Milwaukee had lots of punk/alt/shoegazing bands. BTW, <PIG> is coming back to town.
I nearly fell off my chair when Anthony Bourdain looked Steve up on lunch recommendations in Chicago flashing that album cover on screen in the process.
As an undergraduate, I worked in the electronics shop in the Psych Dep't at Columbia during the time of Nim Chimpsky. Whereas Prof. Terrace always called the chimp "Nim," pretty much everyone else called him "Herbie" (not in Terrace's presence, of course)
I think very, very special people may hear 0.05% distortion if it is mainly higher order harmonics. For the rest of us its probably 3 -5 times higher than that.
I seriously doubt anyone can hear anything at -80dB below the fundamental.
Disagree with me?
DBT it please and show the numbers.
can't stop watching it!! I'm just waiting for someone to bring a vintage piece of audio gear..
I don't know about -120dB but I see -90dB being perceived in this ABX
Jitter Correlation to Audibility | Page 12 | Headphone Reviews and Discussion - Head-Fi.org
Like Mark says, it's the quality of the sound that's affected, not a distinct sound at -90dB - this guy says "Still using the same cue, quality of the piano attack in soft passages, but there's less of it here"
With analysis of the files being used this is stated "That is a really excellent result, the difference between the files is always less than -90.3 dBFS (= 1 LSB in 16-bit resolution), except for a low level "click" at the end of the file, and only rarely has peaks above -96 dBFS."
How on earth do you think anyone can evaluate a dac when they themselves provide an unknown power source and output stage?
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Don't know. Don't listen to fixed sine waves, nor HD in particular. Do listen for IMD. That takes more than one fundamental.
However, if its any calibration point for you, it is completely non-controversial that if audio CDs are not dithered, there will be some people that can hear the resulting quantizing noise/distortion. Since CDs are 16-bits and each bit is worth 6-dB of dynamic range, that puts the truncation effects at down around -96dBFS.
I would be happy to discuss the particulars with anyone interested in volunteering to do the work.
Inquiring minds want to know: how do I "listen for IMD"? I can only listen, you know, like in listening.
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