Alexey V. Lukin wrote:
> MIDI is the beast you can easily port, but sound tracks is  a real pain.
> For instance, portaudio can not give resonable results even on Linux.

Do you have specific examples of problems you have seen?

> Windooze guys are quite satisfied with cracked CakeWalk  and family.

I think the people I was talking about do not use "cracked" anything
and were genuinely interested in having a native Windows port of Rosegarden.

> Huge problem of Win* is unpredictable delays and big latency.
> Main advantage of Linux+ALSA+Jack is possibility of realtime sound processing.

As far as I know Windows does not have a huge problem with either latency or
jitter. Latency on many Windows XP products is nowadays around 1-2milliseconds,
with jitter being around 0.3ms.  Examples:

1ms latency
   Windows XP, Nuendo PCI 96/52 soundcard, ASIO 2.0 drivers
   http://mixonline.com/products/new/audio_new_hardwaresoftware_audio_2/

1.3ms latency (2.8ms worst-case latency); 2ms peak jitter
   Windows XP, Creative SBLive soundcard
** http://www.cs.hmc.edu/~bthom/publications/NIME_04.pdf

1.5ms latency
   Windows XP/2000, RME Hammerfall DSP MADI PCI card
   http://www.synthax.com/rmehdspMADI.html

1.5ms latency
   Windows XP, VSTi plugins for real-time audio effects
   http://www.spinaudio.com/products.php?id=38&page=description

2ms latency
   Windows XP, Creative Audigy 2 Platinum EX 6.1 soundcard, ASIO 2.0 drivers
   http://geek.pricegrabber.com/search_techspecs_full.php/masterid=687417

5ms latency
   Windows XP, Maya 44 USB soundcard
   http://www.alcatech.com/html/digi_en/

William


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