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3 hours ago, Miska said:

 

By the way, I would be more worried about people using DACs with leaky oversampling filters and people using loudspeakers with metal dome tweeters than ultrasonic music content. Something like MQA's upsampling filters produce much higher level ultrasonic content than what you find in many cases with music content, because they spit out images of the base band (< 20 kHz) content. And metal dome tweeters typically have +20 - +40 dB ultrasonic resonance.

 

+1

 

4 hours ago, Miska said:

 

Several hours per every time they play together at 100+ dB. No wonder.

 

The guide says that continuous exposure. As far as I know no music is played more than few second or at most about 1 minute above 100dB. Even if you hear sound at 96dB constantly, it would take one hour to have permanent damage. I have seen some local  people peddle food and man a public toilet close to a waterfall where the noise level was touching 90dB without any hearing loss. At least that's how the appear to me when I talk to them. I think it should be continuous level.

 

4 hours ago, Miska said:

 

 

You are altering your transient response that way though. By the way, do you do brickwall at 20 kHz or what is your filter slope?

 

 

 

I was using slow slope with Mytek which starts to attenuate from 16kHz, IIRC. Now with Motu, I am not sure what filter is being used. But all my SIR2 for the surround attenuates everything starting with 7kHz. The main channel is sadly subjected to the digital amp filter which is brickwall at 22khz. I tried using HPF and LPF to limit the frequencies to have a gentle slope at both ends but decided against it after sometime.

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1 hour ago, STC said:

The guide says that continuous exposure. As far as I know no music is played more than few second or at most about 1 minute above 100dB. Even if you hear sound at 96dB constantly, it would take one hour to have permanent damage. I have seen some local  people peddle food and man a public toilet close to a waterfall where the noise level was touching 90dB without any hearing loss. At least that's how the appear to me when I talk to them. I think it should be continuous level.

 

At least here work safety limit is 80 dB and above that you need to wear hearing protection. Musicians playing several hours every day are often subjected to fairly high levels for long times, when symphony orchestras and such are practicing. Practicing alone without orchestra rarely exposes to such levels though.

 

1 hour ago, STC said:

I was using slow slope with Mytek which starts to attenuate from 16kHz, IIRC. Now with Motu, I am not sure what filter is being used. But all my SIR2 for the surround attenuates everything starting with 7kHz. The main channel is sadly subjected to the digital amp filter which is brickwall at 22khz. I tried using HPF and LPF to limit the frequencies to have a gentle slope at both ends but decided against it after sometime.

 

Even though it begins to attenuate at 16 kHz, it doesn't yet have much attenuation at ultrasonic range. Class-D amp filters are not really brickwall since they are analog. If you are worried about ultrasonics and filter begins to roll off around 20 kHz, analog filters won't have practical effect. And if you put really steep analog filter around 20 kHz is screws up audio band performance totally.

 

I'm personally not worried at all about ultrasonic content from music. And not much about many other sources around, including things like car parking radars and such.

 

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12 hours ago, firedog said:

Tastes differ. I saw it then too and thought it was brilliant. Do you like any other Kubrick movies? If so, any of the later ones?

I liked "Spartacus" and thought that "Paths of Glory" was well done if a little grim and preachy. Did not care for "2001" . Loved "Dr. Strangelove", and enjoyed watching "Full Metal Jacket". The rest (other than "The Shining") I am indifferent to. 

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23 hours ago, mansr said:

Nonsense. Whisky tastes nothing like red wine.

Not what he's saying. From context, it seems to me that he is saying that there are people who think that all whiskies tastes the same and that all red wines tastes the same (I certainly feel sorry for such people). Anybody who thinks that a Woodford Reserve and an Early Times tastes the same, or that a Laphroaig and a Cutty Sark taste the same shouldn't be allowed to drink whisky! Same for someone who thinks that a Charles Shaw (Two-Buck-Chuck) Cabernet and a Lafitte Rothschild 1969 Claret tastes the same ... well, you get the idea!

BTW, Charles Shaw Merlot and Cabernets are certainly more than decent vins ordinare; fine for a week-night's supper. In fact, I'm going to have a Merlot with tonight's porterhouse with baked russet potato and locally sourced  steamed asparagus! (Yum!)

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7 hours ago, Miska said:

I'm personally not worried at all about ultrasonic content from music. And not much about many other sources around, including things like car parking radars and such.

 

Me neither. I don't worry or fret about things I can't see, hear, feel, taste, or smell!

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