New Posts New Posts RSS Feed - Analysing hi-res files
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Welcome to the Graham Slee Audio Products Owners Forum

 

Open to all owners plus those contemplating the purchase of a Graham Slee HiFi System Components audio product and wishing to use this forum's loaner program: join here (Rules on posting can be found here)

This website along with trade marks Graham Slee and HiFi System Components are owned by Cadman Enterprises Ltd

Analysing hi-res files
 Post Reply Post Reply Page  <12345 6>
Author
  Topic Search Topic Search  Topic Options Topic Options
morris_minor View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 27 Mar 2012
Location: Surrey
Status: Offline
Points: 6197 		Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2013 at 8:39am
As usual, Graham, you get right to the heart of the matter! It's what makes this place the sanest forum on the 'net . . . . Cool
Bob

Majestic DAC/pre-amp
Accession MC/Enigma, Accession MM, Reflex M, Elevator EXP, Era Gold V
Solo ULDE, Novo, Lautus USB and digital, Libran balanced, CuSat50
2 x Proprius + Spatia/Spatia Links
Back to Top
ICL1P View Drop Down
Senior Member
Senior Member
Avatar

Joined: 04 Aug 2012
Location: Faringdon, Oxon
Status: Offline
Points: 2397 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ICL1P Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2013 at 12:07pm
Originally posted by Graham Slee Graham Slee wrote:

I doubt if human hearing could detect the difference between a 20kHz square wave and a 20kHz sine wave. For a start, can you hear 20kHz at all?

Have a listen to this: http://ia700202.us.archive.org/9/items/20kHz_tone/20kHz_audacity.wav

No, I didn't hear it and so I can't hear the difference between 20kHz sine or square because I can't hear that high.
I'm delighted to report that I can hear it.  Obviously all those years feeding several hundred screaming hungry sows first thing in the morning didn't damage my hearing too much. 
Ifor
=====
Reflex M & ACCESSION M, CuSat50, Majestic DAC, a Proprius pair.
Back to Top
Graham Slee View Drop Down
Admin Group
Admin Group
Avatar
Retired

Joined: 11 Jan 2008
Location: South Yorkshire
Status: Offline
Points: 16314 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2013 at 1:15pm
Originally posted by ICL1P ICL1P wrote:

I'm delighted to report that I can hear it.  Obviously all those years feeding several hundred screaming hungry sows first thing in the morning didn't damage my hearing too much. 


You can? Congratulations!

Now, if you play music at the same volume how does it compare?

I just tried it on "Mr Golden Ears" here and he could just make it out (age 36) and then playing music at the same volume we upset the next village.
That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps
Back to Top
ICL1P View Drop Down
Senior Member
Senior Member
Avatar

Joined: 04 Aug 2012
Location: Faringdon, Oxon
Status: Offline
Points: 2397 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ICL1P Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2013 at 1:20pm
Originally posted by Graham Slee Graham Slee wrote:

Originally posted by ICL1P ICL1P wrote:

I'm delighted to report that I can hear it.  Obviously all those years feeding several hundred screaming hungry sows first thing in the morning didn't damage my hearing too much. 


You can? Congratulations!

Now, if you play music at the same volume how does it compare?

I just tried it on "Mr Golden Ears" here and he could just make it out (age 36) and then playing music at the same volume we upset the next village.
I had to get very, very close to the speaker.
Ifor
=====
Reflex M & ACCESSION M, CuSat50, Majestic DAC, a Proprius pair.
Back to Top
suede View Drop Down
Senior Member
Senior Member
Avatar

Joined: 25 May 2011
Location: Sweden
Status: Offline
Points: 1202 		Post Options Post Options   Thanks (0) Thanks(0)   Quote suede Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2013 at 6:17pm
I could just detect it. Very faintly but definitely there. Not hearing per se, like a strong clear tone, but rather detecting a faint high pitched sound.
Funny it was the clearest when starting playback and then ebbed away slightly to become a little harder to detect. Perhaps it's the response time it takes for the HD250 to reach a stable 20 kHz, being just slightly lower pitched for the first second.
Back to Top
Graham Slee View Drop Down
Admin Group
Admin Group
Avatar
Retired

Joined: 11 Jan 2008
Location: South Yorkshire
Status: Offline
Points: 16314 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2013 at 9:48pm
I doubt the 20kHz file was anywhere near perfect but serves the purpose.

Thanks to Ifor and Suede for participating.

Graham
That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps
Back to Top
Fatmangolf View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 23 Dec 2009
Location: Middlesbrough
Status: Offline
Points: 9695 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2013 at 10:19pm
Graham I think your work on the phase integrity of the DAC filters has shown how crucial this is to clear natural sound, i.e. high fidelity. My comments on page one were about the need for similar quality in the encoder.
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
Back to Top
 Post Reply Post Reply Page  <12345 6>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.067 seconds.