Hallo, Jamie Bullock hat gesagt: // Jamie Bullock wrote:
On Thu, 2008-06-05 at 19:22 +0200, Luigi Rensinghoff wrote:
Hi
what about vd~ ?? Is it not what you are looking for ?
Or is "non-transposing-delay" any kind of special term i dont know of ??
By 'non-transposing' I mean that the pitch of the delayed signal doesn't get changed as a byproduct of the dynamic change in delay time.
You always get a Doppler effect transposition if you continously change the delay time. For example see the "Momentary Transposition Formula for delay lines" in: http://crca.ucsd.edu/~msp/techniques/latest/book-html/node113.html
Delays behave exactly as wavetable lookup sample players (or vinyl records in DJing) in this regard. A way out is to change the delay times non-continously with (windowed) "jumps" as in your vdb~ (or to lift the needle off the vinyl record and put it dowan at a different position in the groove instead of ac/decelerating the record to get there, which will always transpose).
Anyhow, I managed to work something out by porting vdb~ from the Max/MSP ejies library. See attached.
Btw: Eric Lyon's externals collection "LyonPotpourri" also contains a vdb~ for Pd, but I think it's a slightly different object.
Ciao
Frank Barknecht _ ______footils.org__