24 Feb
2012
24 Feb
'12
6:06 p.m.
On 02/24/2012 05:52 PM, Harry van Haaren wrote:
On Fri, Feb 24, 2012 at 10:12 AM, Joan Quintana
<joan_quintana(a)yahoo.com>wrote;wrote:
Jplay-sndfile-1.0.0 does zero-order hold. No up/downsampling, no
interpolation.
It'd actually be easier to just use librubberband for frequency shifting
and time-stretching.
This is more interesting and not simple like the
previous. A part of
playing back the file, it permits frequency shifting and frequency sweeping
in a range between .5 and 2.
I presume by "frequency shifting & frequency sweeping" you mean resampling
the signal & playing it back, not true "pitch shift" with time remaining
constant..? I'd like to see a simple example of eg: phase
vocoder doing variable rate
pitch shifting / time stretching...
_simple_? well maybe example code that comes with
http://breakfastquay.com/rubberband/
http://www.teuton.org/~gabriel/stretchplayer/ (C++) uses librubberband.
Samplecat's jack_player.c (C) uses LADSPA rubberband and libsamplerate.
The code is not complicated; but probably does not qualify as simple.
Perhaps you've just provided that...? :) -Harry