set_queue_empty_callback behavior

[IrisColt]

Hello, with the code below I'm hearing random music abruptly starting and stopping repeatedly (note fadein=10).

Code: Select all

init python:

    renpy.music.register_channel("music1", mixer="music", loop=False, stop_on_mute=True, tight=True, file_prefix='', file_suffix='', buffer_queue=True) 
    sounds = ["audio/audio{}.wav".format(i) for i in range(1, 3)]

    def m1_callback():
        renpy.music.play(renpy.random.choice(sounds), channel="music1", fadein=10)
    
    renpy.music.set_queue_empty_callback(m1_callback)

label start:
    "Just sit here and listen to the sounds"
    return

However the code below works correctly, that is, the random tracks fadeout for 10 seconds in succession (starting at full volume). The only change is "fadeout=10".

Code: Select all

init python:

    renpy.music.register_channel("music1", mixer="music", loop=False, stop_on_mute=True, tight=True, file_prefix='', file_suffix='', buffer_queue=True) 
    sounds = ["audio/audio{}.wav".format(i) for i in range(1, 3)]

    def m1_callback():
        renpy.music.play(renpy.random.choice(sounds), channel="music1", fadeout=10)
    
    renpy.music.set_queue_empty_callback(m1_callback)

label start:
    "Just sit here and listen to the sounds"
    return

Any help will be very much appreciated!

[Ocelot]

Note that empty queue callback is called when the queue becomes empty, i. e. when the last song starts playing, not when it finishes.
https://www.renpy.org/doc/html/audio.ht ... y_callback

renpy.music.set_queue_empty_callback(callback, channel='music')

This sets a callback that is called when the queue is empty. This callback is called when the queue first becomes empty, and at least once per interaction while the queue is empty.

The callback is called with no parameters. It can queue sounds by calling renpy.music.queue with the appropriate arguments. Please note that the callback may be called while a sound is playing, as long as a queue slot is empty.

In your first example you immideately start playing a single track (with fadein) so queue becomes empty instantly and empty queue callback is called again.

In your second example currently playing track is set to stop (with fadeout) and a new track is placed in queue. When fadeout finishes, new track starts playing, queue becomes empty and callback is called, causing fadeout etc.

[IrisColt]

In your first example you immideately start playing a single track (with fadein) so queue becomes empty instantly and empty queue callback is called again.

In your second example currently playing track is set to stop (with fadeout) and a new track is placed in queue. When fadeout finishes, new track starts playing, queue becomes empty and callback is called, causing fadeout etc.

Thanks for your invaluable insight!

How do I manage to smoothly handle fading in a track, playing it for several seconds, fading it out, and then repeating this process again and again? I'm at a loss.

Thanks again!

[Ocelot]

YOu almost got it, but instead of playing sound in callback, queue it to play right after current sound instead.

[IrisColt]

YOu almost got it, but instead of playing sound in callback, queue it to play right after current sound instead.

Thanks for your answer. Accordingly, my new approach is pasted below. Now music fades in, new music is queued, but the music never fades out (it plays for the configured time and then the music is quickly interrupted instead of fading out, just before playing the next file in the queue).

What am I doing wrong? I am truly desperate.

Thanks in advance.

Code: Select all

init python:

    renpy.music.register_channel("music1", mixer="music", loop=False, stop_on_mute=True, tight=True, file_prefix='', file_suffix='', buffer_queue=True) 
    sounds = ["audio/audio{}.wav".format(i) for i in range(1, 3)]

    def init_music1():
        renpy.music.play("<from 0 to 12>" + renpy.random.choice(sounds), channel='music1', loop=False, fadeout=5, fadein=5) 
        renpy.music.queue("<from 0 to 12>" + renpy.random.choice(sounds), channel='music1', loop=False, fadein=5)
        
    def m1_callback():
        renpy.music.queue("<from 0 to 12>" + renpy.random.choice(sounds), channel='music1', loop=False, fadein=5)
    
    renpy.music.set_queue_empty_callback(m1_callback, channel="music1")

label start:

    python:
        init_music1()

    "Just sit here and listen to the sounds"
    return

[Ocelot]

YOu don't set any fadeout on any tracks aside from the first one.

[IrisColt]

YOu don't set any fadeout on any tracks aside from the first one.

Initially, I anticipated finding a 'fadeout' parameter within renpy.music.queue. However, upon reviewing the documentation, I discovered that such a parameter was not present. https://www.renpy.org/doc/html/audio.ht ... usic.queue

There is only 'fadein' there. Did I understand your point accurately?

Code: Select all

renpy.music.queue(filenames, channel='music', loop=None, clear_queue=True, fadein=0, tight=None, relative_volume=1.0)