[linux-audio-user] es1370 latency and jackd, late driver wakeup

Hello All, I have a bunch of old consumer sound cards. SBLive, Vibra128 and ensoniq 1370(es1370). I went through quite a number of rounds trying out these cards and found that IMHO the es1370 gave me the best sound amongst these cards. So i went ahead and try to start jack according to the capabilities of this card. With this card, i find that once i start jackd like this: jackd -v -R -d alsa es1370 -r 44100 I get lots of xruns immediately. Then i tried with the n=4 (ie 4 periods per hardware buffer), i.e "jackd -v -R -d alsa es1370 -n 4" and I am able to get rid of the xruns. But i see lots of "late driver wakeup: nframes to process=2048" on the jackd output. What does this message mean? For recording into ardour, n=4 and the default frames per period (1024) gives me quite significant latency when recording. e.g when I pluck a note on the electric bass i can hear it on the line-in monitor first and then from the capture slightly later. As a compromise, i set the frames per period to either 64, 128 or 256. But I still get the "late driver wakeup" message and occasional xrun when i quit ardour or sometimes even hydrogen. I notice that when quitting jackd programs there will sometimes be a few xruns. Is this normal? Seems like ideal to start n=2 but this card don't seem to allow me to do that. I could be wrong but i think for low latency n=2 is ideal. If i have saved an ardour project with Tim Goetze's plugin activated in some tracks, ardour may report that it is too slow or (something like that) when i reload that project file. I suspect this is to do with some ladspa plugins requiring low latency which my setup is not able to give. I know this card is old, but it does give a great sound. I used SBLive previously and don't seem to have these latency issues (able to start jack with n=2). For owners of this card, any sound advice to get the most out of it? Thank You very much, Louis ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html