It sounds to me like some bad interpolation. Maybe ALSA→JACK does something?
However why rendering is affected?
Btw: I captured the live output with jack_capture.
2014-02-05 Jonathan Aquilina <[email protected]>:
> Could this potentially have something to do with the latency of alsa or
> pulse
> compared to jack?
>
> On Wednesday, February 05, 2014 03:00:17 PM Tobiasz Karoń wrote:
> > What's strange - the distortion is also present in rendered WAV file,
> > however it sounds different.
> > When using JACK back-end rendered file has no distortion either with
> > Fastest or Best interpolation method (they produce identical output).
> >
> > 2014-02-05 Tobiasz Karoń <[email protected]>:
> > > Using this sample I've just spotted some distortion in the output. I've
> > > calculated the difference with the original sample - it's included as
> > > *distortion.flac*.
> > >
> > > I've made a few tests and I see that it happens with ALSA output
> (bridged
> > > back to JACK) - JACK output doesn't distort the output.
> > > I wonder if this is caused by LMMS or ALSA, or JACK-ALSA bridge?
> > >
> > >
> > > 2014-02-05 Tobiasz Karoń <[email protected]>:
> > >
> > > I've cut it down to 14kB :D
> > >
> > >> Less silence in the beginning and end, will sync better.
> > >>
> > >>
> > >> 2014-02-05 Tobiasz Karoń <[email protected]>:
> > >>
> > >> How about including this one with LMMS?
> > >>
> > >>> --
> > >>> Tobiasz *unfa*
> > >>>
> > >>> -----BEGIN GEEK CODE BLOCK-----
> > >>> Version: 3.1
> > >>> GIT/MU/P d->-- s+:-(--)> a? C++(+++)>$ ULC+(++)>$ !P? L+++>++++$ E?
> > >>> W++>$ !N-? !o--? K-? !w-- O? !M-- V? PS++ PE++ !Y+ !PGP+? !t(+) 5? !X
> > >>> !R+
> > >>> tv b+>+++ DI>+ D+ G e h-->- !r y--()
> > >>> ------END GEEK CODE BLOCK------
> > >>
> > >> --
> > >> Tobiasz *unfa*
> > >>
> > >> -----BEGIN GEEK CODE BLOCK-----
> > >> Version: 3.1
> > >> GIT/MU/P d->-- s+:-(--)> a? C++(+++)>$ ULC+(++)>$ !P? L+++>++++$ E?
> W++>$
> > >> !N-? !o--? K-? !w-- O? !M-- V? PS++ PE++ !Y+ !PGP+? !t(+) 5? !X !R+ tv
> > >> b+>+++ DI>+ D+ G e h-->- !r y--()
> > >> ------END GEEK CODE BLOCK------
> > >
> > > --
> > > Tobiasz *unfa*
> > >
> > > -----BEGIN GEEK CODE BLOCK-----
> > > Version: 3.1
> > > GIT/MU/P d->-- s+:-(--)> a? C++(+++)>$ ULC+(++)>$ !P? L+++>++++$ E?
> W++>$
> > > !N-? !o--? K-? !w-- O? !M-- V? PS++ PE++ !Y+ !PGP+? !t(+) 5? !X !R+ tv
> > > b+>+++ DI>+ D+ G e h-->- !r y--()
> > > ------END GEEK CODE BLOCK------
>
>
--
Tobiasz *unfa*
-----BEGIN GEEK CODE BLOCK-----
Version: 3.1
GIT/MU/P d->-- s+:-(--)> a? C++(+++)>$ ULC+(++)>$ !P? L+++>++++$ E? W++>$
!N-? !o--? K-? !w-- O? !M-- V? PS++ PE++ !Y+ !PGP+? !t(+) 5? !X !R+ tv
b+>+++ DI>+ D+ G e h-->- !r y--()
------END GEEK CODE BLOCK------
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