Re: Easy question: ppq and tempo

[Paul Davis <pbd@op.net>]

>>"ppq" stands for "parts per quarter". as the header file suggests
>>without much explanation, its length of a quarter note expressed in
>>clock ticks. if the meter is 4/4 and the tempo is 120bpm, then a
>>quarter note lasts 0.5 seconds. if the clock used for timing ticks 100
>>times per second, there are 50 clock ticks per quarter note, so
>>ppq=50.
>
>though usually it will be a number divisible by 3 and 4 to make
>triplets and even beats alike coincide with integer ticks. cubase
>on the atari used to set this to 192, though some do prefer 480 or
>even more to allow for minute timing ('groove') adjustments.

where "it" is the clock ticks per second. 

thanks tim, i had always wondered why 192 or 480 etc. was used, and
never knew until now :)

--p

_______________________________________________________________

Don't miss the 2002 Sprint PCS Application Developer's Conference
August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm