[64studio-devel] 0.9.5 is out

[joel silvestre]

Le vendredi 27 octobre 2006 à 10:30 +0200, Free Ekanayaka a écrit : 
> |--==> joel silvestre writes:
> 
>   >>
>   >>
>   js> Yes  the quatafire works with Freebob. Currently with 64studio
on the
>   js> core duo laptop.
> 
> Great.
> 
>   js> As I know nothing about linux I do break a lot of thing. Since I
can
>   js> hear and see Xruns not reported by Jack. Recording a sinus with
ardour
>   js> shows random strange spikes at the top of the sinusoide. Surely
not
>   js> freebob related because it's the same with an USB interface and
even
>   js> with plain Jack direct connection!


Hi ,

I do more tests, stranges spikes on the top of sinusoide were due to the
Ladspa oscillator plugin...
But dropouts not reported as Xruns are for real.
Follows explanation from Pieter Palmers :

> The dropouts are due to the firewire kernel drivers getting the
> contents 
> of the packets too late. I think it is partly a freebob design
> problem 
> (to be fixed in 2.0), and partly a firewire subsystem issue. The
> problem 
> is that I don't have time to dig into this for the moment. what you
> can 
> do is compile a debug version of libfreebob (./configure
> --enable-debug 
> ...) and try that one. This should enable a packet counter output
> that 
> will also give information about dropped packets.
> 
> Another thing you could try is running with -n3 instead of -n2. Due
> to 
> some internal issues, -n3 -p512 runs better than -n2 -p1024 (and also 
> gives slightly less latency).
> 
> Pieter 

Some screenshots: 
http://perso.orange.fr/jsilvestre/freebob/full.png
http://perso.orange.fr/jsilvestre/freebob/5-46-3085.png
http://perso.orange.fr/jsilvestre/freebob/5-55-795.png

Bottom tracks are after highpass filtering for dropout detection.
So I will wait Freebob 2.0 for real audio work with Firewire...


> As  far   as  I  can   tell the  libjack/jackd  0.102.20  packages ARE
> compatible with the latest 64 Studio release.  The API and the ABI did
> not change in the new version so there should be no problem in running
> the apps built against the old version.
> 

I try jackd 0.102.23 and 0.102.20 in 64Studio. Both refuse connecting
whith old jackd built apps, saying libjack version mismatch. But I may
have miss something?


Cheers,
joël