Re: Sync external metronome/device

On Sat, Nov 07, 2020 at 10:48:35PM +0100, Igor Piccini wrote:
> Hello,
> 
> thanks to Jeanette for the answer, but i haven't resolved any issue.
> 
> i made a lot of tests about the problem using midish version 1.3.0 (aug 10
> 2019) and also older versions, but i have the same issue.
> I tried free (gpl) and commercial software and hardware.
> Finally i used a software monitor for midi events and the results of my
> tests are:
> 
> 1- started midish from command line without any parameters
> 2- configured a new device with command 'dnew 0 "nn:nn" rw'
> 2- loaded a midifile with constant tempo at 120 bpm
> 3- tested the midi track with another software and the midi softw. monitor
> says 500ms for beat (correct:: 60sec/120bpm = 0,5sec = 500ms)
> 4- enabled midish with 'dclktx {0}' to transmit MIDI clock to my device
> (midi monitor)
> 5- started playing 'p'
> 6- the midi monitor software says 25ms instead of 500ms !!!!
> 7- tested with track with tempo changes and the output of midish tempo
> changes in proportion but always about 20 times faster.
> 

So, the monitor is synchronized to midish, but the tempo ratio is
wrong.

Could you do the same test without loading any midi file? Midish
default tempo is 120bpm.

The MIDI standard uses 24 clock ticks per quarter note, which is also
midish's default setting.