[ardour-users] Dolby Digital Sound Mixing

[Edwin Peer]

On Sunday 14 August 2005 17:18, Allan Klinbail wrote:

> Hi, I'm using a 64-bit AMD system (Gentoo). The only thing I can't get
> working are the VST libraries.... (through any of the three available
> options).... otherwise my system is very stable and working  at low
> latency ... (2.9 ms in 44.k 32 bit mode with 16+ tracks and multiple
> plugins). My only recommendation is  use Gentoo if you can and optimize
> as much as you can.

I would love to know more about your setup. I am also running an amd64 system 
under Gentoo and mostly it works. I am using two RME Multiface boards to get 
16 tracks of analogue inputs but jack suffers horrible xruns if I actually 
try to get ALSA to map both both cards into one virtual card for jack. The 
solution I've come up with at the moment is sending the analogue inputs of 
the one card via ADAT to the other card and only speaking to the first card 
with ALSA. Not ideal, but for now it's okay. I may want to use the other 
inputs later tho'.

Are you running Ingo's low latency kernel? I haven't managed to get it to run 
stable - when I even get a version of it to actually compile under amd64. 
Using the standard gentoo-sources, I haven't been able to get down to 2.9ms 
reliably on fairly meaty hardware (Dell PE1800, dual EM64T, SCSI RAID-5 w/5x 
10 000RPM drives). 

Other weird issues I have are:

1) Ardour (beta29, haven't ventured into ardour-cvs yet) sometimes crashes. I 
haven't reported any of these problems yet, because I have not been able to 
reproduce them reliably.

2) Jamin (portage, 0.9.0-r1) sometimes fails to start but works properly once 
it does and 0.95.0-r6 causes horrible crackle with lots of xruns.  

3)  Not ardour related, but Rezound dies on playback (This particular issue 
has already been reported on Rezound's bug tracker for amd64, so at least I 
know I'm not the only one).

- Edwin