Gerald Grabner wrote:
>Hi,
>
>I'm just starting to write my first alsa-lib midi applications. I'm
>wondering what the acronym ppq stands for and what it means (especially
>in relation to tempo). Unfortunately, I didn't find any docu on the
>topic of tempo.
from <sound/asequencer.h>:
/* queue tempo */
struct sndrv_seq_queue_tempo {
int queue; /* sequencer queue */
unsigned int tempo; /* current tempo, us/tick */
int ppq; /* time resolution, ticks/quarter */
unsigned int skew_value; /* queue skew */
unsigned int skew_base; /* queue skew base */
char reserved[24]; /* for the future */
};
the value is usually synonymous to the 'division' of a standard midi
file.
tim
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