Hey Paul!
Then this is a plugin thing - it does not have length parameter - only pitch
parameters.
I guess this is why it is called Pitch Shifter.
Guys, is there any LADSPA plugin that can do time stretching? I did not find
any.
On Tue, Jan 26, 2010 at 11:10 AM, Paul Giblock <[email protected]> wrote:
> Rubberband is pretty good, we are planning on using it in future
> versions of LMMS to support tempo/pitch independent changes to
> sample-tracks.
> Since we will be using it on sample-tracks, the processing can be
> precalculated and we can run the conversion with high quality
> settings.
>
> 1) Are you doing something wrong? Maybe. I'm confused why you are
> adjusting cents. Cents is a measure of pitch. The purpose of a tool
> like rubberband is to adjust duration and pitch independently. This
> is probably why you notice the pitch changing without a noticeable
> change in length. I would think you want to adjust something like
> "tempo", "duration", "stretch"... something along those lines. I never
> used Rubberband as an FX before, so I couldn't say for sure.
> 2) How many cents is 1 bpm? This depends on the actual tempo. 1 cent =
> 1/100th of a semitone or 1/1200 of an octave. To fit something
> recorded at 130bpm into 129bpm with a standard sampler (where lowering
> the pitch causes the length to increase) you would need:
>
> 130 to 129 bpm will require an increase in length of 1/129 (0.7752%)
>
> Therefore, the octave will need to drop by 1/129 of an octave (9.302
> cents)
>
> This may or may not be right, it is 3:00AM and I am just doing this in my
> head.
>
> -Paul
>
> On Mon, Jan 25, 2010 at 11:09 PM, Louigi Verona <[email protected]>
> wrote:
> > Hey guys!
> > I am trying to stretch a loop to use in a song. I tried using various
> pitch
> > shifting ladspa plugins, like rubberband and AM pitchshifter, but no
> matter
> > how much or how so small I change the loop, it will not be flawless. The
> > original tempo of the loop is 130, the tempo of the song is 129. If I set
> > the tempo of the song to 130, the loop is perfect.
> > Using rubberband I tried adjusting cents, since a semitone is too much
> down,
> > but going even 0.5 cents down instantly produces very noticable artifacts
> > and there is always a noticable artifact in the end of the loop. I mean -
> I
> > hear the change in the pitch, but I do not hear the change in the length
> of
> > the loop.
> >
> > I tried doing auto stretching in QTractor, thinking I just cannot find
> the
> > correct value, but in QTractor the result is the same - there is a
> noticable
> > gap(artifact) in the end which makes the loop not perfect.
> >
> > Also, as soon as rubberband plugin is activated - the loop goes out of
> sync
> > with the rest of the song even if I make no changes - there appears a
> slight
> > pause before the loops starts to play. No such effect with AM
> pitchshifter.
> >
> > Eventually, what I did was change the pitch of the loop 15 cents down by
> > means of the Pitch knob in the lmms instrument window. It worked,
> although
> > did tune it down a bit, but hardly noticable. Of course, I would prefer
> to
> > stretch a sample without shifting its pitch.
> >
> > So I have two questions.
> >
> > 1. Am I doing something wrong with Rubberband or is it really not that
> top
> > notch?
> > 2. How much cents is 1 bpm?
> >
> > Louigi.
> >
> > ps: tried elastique stretching of the same sample in FL Studio. Although
> > nice result I did hear some slight artifacts.
> >
> >
> ------------------------------------------------------------------------------
> > The Planet: dedicated and managed hosting, cloud storage, colocation
> > Stay online with enterprise data centers and the best network in the
> > business
> > Choose flexible plans and management services without long-term contracts
> > Personal 24x7 support from experience hosting pros just a phone call
> away.
> > http://p.sf.net/sfu/theplanet-com
> > _______________________________________________
> > Lmms-users mailing list
> > [email protected]
> > https://lists.sourceforge.net/lists/listinfo/lmms-users
> >
> >
>
------------------------------------------------------------------------------
The Planet: dedicated and managed hosting, cloud storage, colocation
Stay online with enterprise data centers and the best network in the business
Choose flexible plans and management services without long-term contracts
Personal 24x7 support from experience hosting pros just a phone call away.
http://p.sf.net/sfu/theplanet-com
_______________________________________________
Lmms-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/lmms-users
