[LAU] midi triggering delay

andy baxter andy at earthsong.free-online.co.uk
Thu Sep 17 14:17:26 EDT 2009


Clemens Ladisch wrote:
> andy baxter wrote:
>   
>> when I play notes on the keyboard into fluidsynth, the notes are
>> slightly delayed. The delay is small (around 0.1s ?) but enough to be
>> annoying.
>>     
>
> Is the delay constant or random?
>
> If you monitor the keyboard's output with aseqdump at the same time, do
> you see the same delay when the notes are printed?
>
>
> Best regards,
> Clemens
>
>   
The delay is variable - sometimes the note will sound almost 
immediately, but usually there is a slight delay.

I've tried with aseqdump, and as far as I can tell there is no delay - 
'note on' seems to appear at the same moment that I press the key.

I've also tried using zynaddsubfx instead of qsynth / fluidsynth, and 
the delay is still there.

Which seems odd - I would have expected that if aseqdump was not showing 
a delay then the problem must be with qsynth. Maybe there's some library 
or code snippet that zyn and qsynth both share?

I'm wondering if it would help to install the whole of ubuntu hardy on 
my new laptop and see if that cures the problem (that's what my old 
laptop is running, which works fine.)

andy





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