Gonna agree here. I could hear that there were pitches higher and lower than others, some better in one ear than the other, as they seemed to move around. Don't know if this was due to me or the speakers. Once I knew the melody, repeated listenings were probably prejudiced to hear it. Sampled at 44 KHz (looking at the file properties), anything that's not 5.5 KHz, 11 KHz, or 22 KHz is going to have a significant amount of aliasing that becomes more noticeable as the frequency goes up. Notes without aliasing will seem quite pure in comparison. It would be interesting to hear this as a purely analog signal.
John Baumgart -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Robert Dickow Sent: Friday, November 12, 2010 6:28 PM To: 'The Horn List' Subject: Re: [Hornlist] Name that (high frequency) tune! I recognized the tune right away, but less by pitch than by rhythm and contour. That was because on my computer, the sound file was generating a set of 'inharmonic' differentials, obscuring the intended pitch. The Nyquist frequency suggests a minimum 10+ khz sampling rate, if these really are sine waves. If they have any overtones at all, you have to double the highest desired frequency of interest and sample at that rate X 2, or set up a filter. I think we're hearing a an awful lot of fold-over. Bob Dickow Lionel Hampton School of Music -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, November 12, 2010 5:22 AM To: [email protected] Subject: [Hornlist] Name that (high frequency) tune! I found a place to host a sample melody I generated with Sine waves between 7000Hz and 11000Hz. Name that tune! (I used something with a particular key...). _http://www.mediafire.com/file/d64vyqgt3lz18ri/highmelody.wav_ (http://www.mediafire.com/file/d64vyqgt3lz18ri/highmelody.wav) Let's see if people can really tell frequencies apart above 5000Hz. -William In a message dated 11/12/2010 6:41:05 A.M. Eastern Standard Time, [email protected] writes: On 12Nov 2010, at 12:07 , Michiel van der Linden wrote: > "Melodies played using frequencies above 5000 Hz sound rather > peculiar. You can tell that something is changing but it doesn't sound > "melodic" in any way." > > I've not yet found an audio example online, but will keep looking. Creating your own example on your computer should be easy, I'll try that in a couple of days if nobody else does. Daniel _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/valkhorn%40aol.com _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/dickow%40uidaho.edu _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/john.baumgart%40com cast.net _______________________________________________ post: [email protected] unsubscribe or set options at https://pegasus.memphis.edu/cgi-bin/mailman/options/horn/archive%40jab.org
