linuxaudio.org

Dear Linux Audio Developers,
as indicated by Stéphane in his presentation [1] he gave at LAC2009 today, I

finally handed in my diploma thesis, which I announced here [2]. You can

download the full text of the thesis here:
	 [3].
If you want to take a glimpse at the code, you can get a (still very dirty)

snapshot of the code here [4]. 
The abstract of the thesis:
> Several available free software audio solutions were analyzed, and

quoted text
> Jackdmp—a C++ reimplementation of the renowned JACK Audio Connection

> Kit—was selected as the most appropriate solution for a real-time audio

> architecture on DROPS. The JACK sound architecture provides the lowest

> processing latency possible on a desktop computer for a given set of sound

> card parameters. It reduces the latency jitter caused by software to zero

> and synchronizes streams at sample accuracy.

>     A real-time admission scheme for JACK clients is proposed.

quoted text
> The execution time of different typical JACK clients was analyzed with

> measurements to validate the assumptions the proposal is based on,

> but also to gain further knowledge about their timing behavior.

> The measurements showed that the condition set by Paul Davis—the

> time to process a client must be a linear function of the buffer size—holds

> for all tested clients.

>    Jackdmp was ported to DROPS. The developed design of the port and its

quoted text
> implementation is documented here. Measurements showed that—although

> the real-time performance of the Linux kernel is continously being improved

> in the mainline and on special external branches—DROPS can provide a

> signaling latency that is two times lower on average than the values that

> can be achieved on the same machine running with a low latency patched

> Linux kernel. Thus, it can be stated that DROPS is well-suited for

> real-time audio processing and that the pursued path to use it as the

> foundation of a truly real-time capable audio workstation should be

> followed.

As of the project's future: I will try to get the ALSA driver and the

connection with L4Linux working until the presentation of the project (no

date set so far, but probably in 2--4 weeks or so). If all works well, we

will consider releasing a demo disc and / or a Youtube demonstration for

interested developers and power users of the system then. And then we'll

see :).
Kind regards --- and those of you who are in Parma: Have an interesting

conference and a great time in Italy! ---,
micu

===============================================================

[1]

[2]

[3]

   // This is only a temporal location, I will inform you about the final

      location here as soon as the document is published there.

[4]

--

GnuPG:		https://www1.inf.tu-dresden.de/~s3418892/micuintus.asc

Fingerprint:	1A15 A480 1F8B 07F6 9D12 3426 CEFE 7455 E4CB 4E80
<<>
https://wiki.c3d2.de/Benutzer:Micuintus

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