[LAU] midi triggering delay

andy baxter andy at earthsong.free-online.co.uk
Wed Sep 9 12:27:56 EDT 2009


andy baxter wrote:
> Hi all,
>
> I'm trying to get my usb midi keyboard (an edirol PCR 800) working with 
> my good laptop (a 1400 MHz core 2 thinkpad X61s). I have jackd running 
> with 8 msec latency and no xruns using an onboard intel HDA sound card. 
> When I hook up qsynth (fluidsynth) to the keyboard's alsa midi output, 
> the notes are triggered with a slight (<0.1s?), and variable time delay. 
> Sometimes the note plays immediately on pressing the key; sometimes 
> there is a noticeable delay. This does not happen when I use the same 
> setup on my old laptop (a 1400 Mhz single core dell).
>   

I've tried kernel 2.6.24.7-rt27, and this is no better with the midi 
timing than any of the others (but has a problem with my intel HDA / 
Analog devices onboard sound card). Thinking of trying just copying the 
kernel and modules from my old laptop (which is running ubuntu hardy I 
think) to see if that cures it.

andy



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