[LAU] Play with latencies

[Jostein Chr. Andersen]

Hi Dominic,

Dominic Sacré wrote:
...
> An interesting table to put things into perspective. The third column 
> doesn't seem right though. As far as I can see, the actual note values are 
> only half of those in the table (assuming bpm means quarters per minute, of 
> course). Makes the latencies appear a lot less dramatic from a musical 
> point of view :)
...

You are right of course. The strange thing is that I was looking over it 
and over again, feeling that something was very wrong but I did not see 
it.   Thanks for pointing it out! :-)

Hope it's right this time:

  Time in  Length Note,
       ms    in m 120 bpm Comments
======== ======= ======= ===========================================
  1000.00  343.00     1/2 en.wikipedia.org/wiki/Speed_of_sound
   500.00  171.50     1/4 Common delay speed (echo)
   250.00   85.75     1/8            "
   125.00   42.88    1/16            "
   100.00   34.30
    62.50   21.44    1/32 Distande between people in a big orch.
*  46.40   15.92         Latency value
    31.25   10.72    1/64 Playing real music that fast? Get a life!
*  23.20    7.96         Latency value
    15.63    5.36   1/128
*  11.60    3.98         Latency value
    10.00    3.43
     7.81    2.68   1/256 Academic interest (musically)
*   5.80    1.99         Latency value
     5.00    1.72         Dist. from ear to foot
     3.91    1.34   1/512
*   2.90    0.99         Latency value, almost 1 meter
     1.96    0.67  1/1024
*   1.45    0.50         Latency, common dist. to monitor
     1.00    0.34         Not an uncommon distance to mic or wife
     0.98    0.33  1/2048
*   0.73    0.25         Latency value
     0.49    0.17  1/4096 of academic interest (musically)

The latency numbers is taken from qjackctl's setup dialog box when 
frames/period are from 16 to 1024 on a 44100 sample rate system with 2 
periods/buffer.


Jostein