Recent content by Blumlein 88

  1. Blumlein 88

    Do You Need an External DAC/Headphone Amplifier?

    I've tested a handful of laptops. That is more or less what I've seen with most. Decent SINAD, low distortion and low output levels. If you use IEMs you think it has plenty good enough sound. If you are in quiet surroundings non-IEM use seems okay. But hook up something better and the...
  2. Blumlein 88

    AIX Records High Rez Test Results

    Yes there has been a test like this. Concurrent recording in 88/24 and 44/16. Offerings to university students in a blind test were 88 vs 44, 88 vs downsampled to 44. A result for 88 vs downsampled to 44 was positive for a difference. However, 88 vs concurrent 44 gave null results. The...
  3. Blumlein 88

    AIX Records High Rez Test Results

    Yes, statistics is hard for some. I agree if you wonder about the 6 for 6 people give them a second chance. But we really don't need to do that. His results are pretty much within expectations for random chance. And yes breaking out the 0 of 6 from those who simply said, I can't hear a...
  4. Blumlein 88

    Vinyl madness

    Yes, this is what you need to do. I did rips for a friend's LP system without sound. He didn't like them as much. I told him we needed to do rips with sound playing. Those sounded like he expected. In his case at the time he had tube preamps and power amps. They were picking up a little...
  5. Blumlein 88

    Hello from England

    Welcome to ASR. Glad you found the site. I'm sure an ME can provide some useful knowledge on things we do in audio.
  6. Blumlein 88

    Can you really hear the lossy codec? - a public blind test

    I couldn't find anything to choose between them. So I voted no difference.
  7. Blumlein 88

    Surround sound processors

    Yes, that is the best arrangement because your processor will function as a video and audio switching center. In order for that to work all devices will have to be HDCP 2.2 compliant or none of it will work. The Roku and TV will be no problem. You'll have to make sure the processor is. Most...
  8. Blumlein 88

    Surround sound processors

    That probably depends upon the TV. I'm assuming something like your 4k TV is getting an off the air or cable 4k video and you let it spit out the audio for use by a surround processor. In such a case I suppose the HDMI might not matter for the video portion. You'll run into issues however...
  9. Blumlein 88

    AIX Records High Rez Test Results

    According to some "knowledgeable" people on the internet Amir doesn't have any hearing. He looks at the waveforms captured by his AP and imagines what it would sound like if he were a hearing person. :p:p:p
  10. Blumlein 88

    Surround sound processors

    Were I still looking I would consider Yamaha and Onkyo Integra units, but I've got the Marantz which I've now measured so I know it is pretty good. The handling of video by the Marantz is excellent as well. And you will need HDMI 2.0 for 4K HDR.
  11. Blumlein 88

    Surround sound processors

    Your best bet is to purchase second hand processors. There are few below $1000 new. One of them is the Emotiva UMC200. https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurement-of-emotiva-umc200-pre-pro.3504/ I was not happy with the performance. I use powered speakers...
  12. Blumlein 88

    How High of a Sample Rate is Enough?

    Something you can try with the signals I prepared is on those where your sons heard differences reduce the level a few decibels and see if they still hear a difference. The threshold for those higher harmonics like at 22 khz would be rather high. So reducing the signal say 10 db might then...
  13. Blumlein 88

    How High of a Sample Rate is Enough?

    Audacity makes square waves with aliasing. Lots of it. However, under the section to generate waveforms there is an option to generate "square, no aliasing" which does indeed generate a nice square wave within the bandwidth limitations that does not have aliasing.
  14. Blumlein 88

    How High of a Sample Rate is Enough?

    Bonus file. 7 khz and 14 khz without 21 khz.
  15. Blumlein 88

    How High of a Sample Rate is Enough?

    Okay one zip file. Opens into FLAC format. 30 seconds per file. The fundamental is -6 db for each. Potentially tweeter busting levels. Be easy on the volume till you choose an appropriate level.
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