Re: [sweep-users] Sweep running under jack

[Conrad P. <co...@me...>]

On 23/12/06, pete <zen...@ze...> wrote:
> On Fri, 2006-12-22 at 12:33 +1100, Erik de Castro Lopo wrote:
> > peter wrote:
> >
> > > svn co http://svn.metadecks.org/sweep/branches/sweep-jack-testing
> > >  will get you the closest we have to a jackified sweep. there's no jack
> > > input (recording) yet and if you playback files that have a different
> > > samplerate to your running jackd then it won't sound too good given
> > > sweeps rather noisy resampling.
> >
> > When running with Jack output and the user attempts to open
> > a file at a different sample rate, I think it would be a really
> > good idea to either fail with an error dialog and/or ask
> > the user to sample rate convert it to the jack sample rate
> > using libsamplerate.
>
> well, correct me if i'm wrong but, couldn't we use libsamplerate on the
> fly to convert where needed at all output stages?
> we could have options to select the converter, optional obstructive
> warning dialogs (for the paranoid and forgetful) and some sort of
> visual indicator that highlights when source and output rates
> don't match?
>
> it's not just useful for jack either, the alsa plug layer resampler is
> limited by (current) design to linear interpolation iirc, so application
> side resampling (albeit via libsamplerate) would be a improvement there
> too.
>
> i was also wondering if we could use libsamplerate to handle scrubbing?

yeah, libsamplerate would be good for both these uses :-)

The current architecture (doing very cheap interpolation) was done
around 2001 or so. I reckon we can afford the CPU to do better quality
rate conversion now ;-)

cheers,

Conrad.