Make tick sound more stable using background long audio playing

[hwiorn]

org-pomodoro play tick sound every second using run-with-timer and sometimes it makes tick sound lag and no mode-line updates a little while.

The tick sound is important to focus more in a pomodoro session. However, the dragging bit tempo sound makes quite distraction instead of focus to a task. To me, Really, this made me hesitate to use org-pomodoro for a long time. So I used web pomodoro timer such as pomofocus.

I generate the tick.wav to a 10 seconds MP3 file(tick_long.mp3). And I added the background playing code using mpv, mplayer, ffplay (ffmpeg) or play (sox).

(use-package org-pomodoro
  :custom
  (org-pomodoro-ticking-sound-long t)
  (org-pomodoro-ticking-sound-p t)
  (org-pomodoro-keep-killed-pomodoro-time t))

[hwiorn]

I think 60 seconds tick would be better performance for low-end devices.
Because other pomodoro apps and web services use long clock audio file for same reason.
But this size is quite big which is 938 KiB and 10 seconds audio doesn't have lagging issue currently.

• 0.2 seconds tick sound WAV(original): 37 KiB
• 0.2 seconds tick sound MP3: 4.1 KiB
• 10 seconds tick sound WAV: 1.7 MiB
• 10 seconds tick sound MP3: 157 KiB
• 60 seconds tick sound WAV: 11 MiB
• 60 seconds tick sound MP3: 938 KiB