Helpfile B.14.sampler.rockafella may be a good place to start. On Mon, 5 Mar 2007 14:15:26 -0600 "Mike McGonagle" <[EMAIL PROTECTED]> wrote:
> I don't want to change the subject (and if needed, we can start a new > thread), but as this might be a related topic, here it is... > > What would it take to turn this into a "Slowdown" abstraction? > Basically, I am interested in slowing down the tempo of a sound, but > NOT changing the pitch... > > Am I off-base on this? Or can this be used as the starting point for > what I described? > > Thanks, > > Mike > > > On 3/5/07, Frank Barknecht <[EMAIL PROTECTED]> wrote: > > Hallo, > > Kyle Klipowicz hat gesagt: // Kyle Klipowicz wrote: > > > > > Could aliasing be avoided by using a multi-pole low pass filter at > > > nyquist before sending the signal to the dac? > > > > No: Alias frequencies aren't too high, they are wrong frequencies, > > that have been mirrored at the Nyquist border. As soon as you try to > > play a sinewave at Nyquist + x, what you get is a sine at Nyquist - x, > > and you cannot lowpass out this frequency after it has been > > introduced. > > > > You can however upsample your signal first, then use a lowpass filter, > > then downsample again. See this chapter in The Book for more info: > > http://crca.ucsd.edu/~msp/techniques/latest/book-html/node194.html > > and J07.oversampling.pd > > > > Ciao > > -- > > Frank Barknecht _ ______footils.org_ __goto10.org__ > > > > _______________________________________________ > > PD-list@iem.at mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > > > > -- > Help the Environment, Plant a Bush back in Texas! > > "I place economy among the first and most important republican > virtues, and public debt as the greatest of the dangers to be feared. > To preserve our independence, we must not let our rulers load us with > perpetual debt." > -- Thomas Jefferson, third US president, architect and author (1743-1826) > > "Give Peace a Chance" -- John Lennon (9 October 1940 _ 8 December 1980) > > Peace may sound simple_one beautiful word_ but it requires everything > we have, every quality, every strength, every dream, every high ideal. > _Yehudi Menuhin (1916_1999), musician > > _______________________________________________ > PD-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list _______________________________________________ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
