Per-sample Volume Interpolation
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Casey Muratori
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Matt Mascarenhas
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Miguel Lechón
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0:46Plan for today
0:46Plan for today
0:46Plan for today
2:07Dynamic asset streaming and audio mixing didn't take that much code
2:07Dynamic asset streaming and audio mixing didn't take that much code
2:07Dynamic asset streaming and audio mixing didn't take that much code
3:37Public service announcement: Sometimes, writing your own code is faster than reusing other people's code
3:37Public service announcement: Sometimes, writing your own code is faster than reusing other people's code
3:37Public service announcement: Sometimes, writing your own code is faster than reusing other people's code
5:56Some differences between audio and video animation and their effects on sound mixing architecture
5:56Some differences between audio and video animation and their effects on sound mixing architecture
5:56Some differences between audio and video animation and their effects on sound mixing architecture
9:55We want to change volume over time, while avoiding discontinuities
9:55We want to change volume over time, while avoiding discontinuities
9:55We want to change volume over time, while avoiding discontinuities
12:53Definition of the interface to ChangeVolume
12:53Definition of the interface to ChangeVolume
12:53Definition of the interface to ChangeVolume
14:03Two ways of specifying speed of volume change: time it takes to reach target volume vs rate of change
14:03Two ways of specifying speed of volume change: time it takes to reach target volume vs rate of change
14:03Two ways of specifying speed of volume change: time it takes to reach target volume vs rate of change
21:20Using dimensional analysis to figure out dVolume
21:20Using dimensional analysis to figure out dVolume
21:20Using dimensional analysis to figure out dVolume
30:50Changing resolution back to 960x540 to remain in debug mode at a reasonable framerate
30:50Changing resolution back to 960x540 to remain in debug mode at a reasonable framerate
30:50Changing resolution back to 960x540 to remain in debug mode at a reasonable framerate
34:30Avoiding overshooting the target volume
34:30Avoiding overshooting the target volume
34:30Avoiding overshooting the target volume
44:28Problem of current approach: repeated imprecise floating-point addition may lead to errors
44:28Problem of current approach: repeated imprecise floating-point addition may lead to errors
44:28Problem of current approach: repeated imprecise floating-point addition may lead to errors
45:25Alternative approach: linear interpolation between beginning and end volumes
45:25Alternative approach: linear interpolation between beginning and end volumes
45:25Alternative approach: linear interpolation between beginning and end volumes
46:42Alternative approach: backsolving to hit the target volume at the end of the loop
46:42Alternative approach: backsolving to hit the target volume at the end of the loop
46:42Alternative approach: backsolving to hit the target volume at the end of the loop
48:11Testing ChangeVolume interactively
48:11Testing ChangeVolume interactively
48:11Testing ChangeVolume interactively
53:08Q&A
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53:08Q&A
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53:08Q&A
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53:49constantinopol Can you show again how you skipped a failed assertion, by going to disassembly?
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53:49constantinopol Can you show again how you skipped a failed assertion, by going to disassembly?
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53:49constantinopol Can you show again how you skipped a failed assertion, by going to disassembly?
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1:00:10swampy_butt Would there be any case where you would like to increase volume non-linearly?
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1:00:10swampy_butt Would there be any case where you would like to increase volume non-linearly?
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1:00:10swampy_butt Would there be any case where you would like to increase volume non-linearly?
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1:02:01flyingsand So far you can just change the volume of individual sounds. Should we be able to change the volume of the master output as well?
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1:02:01flyingsand So far you can just change the volume of individual sounds. Should we be able to change the volume of the master output as well?
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1:02:01flyingsand So far you can just change the volume of individual sounds. Should we be able to change the volume of the master output as well?
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1:03:26chronaldragon Will Handmade Hero support spatialization? e.g. sound mostly in left channel if on left side of the screen, sound mostly in right channel if on right side, etc.
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1:03:26chronaldragon Will Handmade Hero support spatialization? e.g. sound mostly in left channel if on left side of the screen, sound mostly in right channel if on right side, etc.
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1:03:26chronaldragon Will Handmade Hero support spatialization? e.g. sound mostly in left channel if on left side of the screen, sound mostly in right channel if on right side, etc.
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1:04:03rpg_ignis How hard would it be to do a fade-out/fade-in for the music when the window loses focus/gets focus back?
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1:04:03rpg_ignis How hard would it be to do a fade-out/fade-in for the music when the window loses focus/gets focus back?
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1:04:03rpg_ignis How hard would it be to do a fade-out/fade-in for the music when the window loses focus/gets focus back?
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1:05:09gasto5 So what did you end up doing to dVolume if it wasn't linear interpolation?
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1:05:09gasto5 So what did you end up doing to dVolume if it wasn't linear interpolation?
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1:05:09gasto5 So what did you end up doing to dVolume if it wasn't linear interpolation?
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1:05:28waterlimon If you implemented Assert using ?: instead of if, you could use it as part of expressions or other such places where you can't have an if statement
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1:05:28waterlimon If you implemented Assert using ?: instead of if, you could use it as part of expressions or other such places where you can't have an if statement
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1:05:28waterlimon If you implemented Assert using ?: instead of if, you could use it as part of expressions or other such places where you can't have an if statement
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1:06:15gasto5 Did you already implement audio clipping?
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1:06:15gasto5 Did you already implement audio clipping?
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1:06:15gasto5 Did you already implement audio clipping?
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1:07:34gasto5 (clarification) Managing audio dynamic range. Yes
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1:07:34gasto5 (clarification) Managing audio dynamic range. Yes
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1:07:34gasto5 (clarification) Managing audio dynamic range. Yes
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1:08:04waterlimon With respect to Assert, I don't know why you would want to put one in an expression, but apparently that's how it's usually implemented... It can't hurt, right?
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1:08:04waterlimon With respect to Assert, I don't know why you would want to put one in an expression, but apparently that's how it's usually implemented... It can't hurt, right?
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1:08:04waterlimon With respect to Assert, I don't know why you would want to put one in an expression, but apparently that's how it's usually implemented... It can't hurt, right?
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1:09:45flyingsand You can't just hard-clip audio, though. If you don't use a compressor/limiter you would have to at least use soft-clipping with tanh or something
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1:09:45flyingsand You can't just hard-clip audio, though. If you don't use a compressor/limiter you would have to at least use soft-clipping with tanh or something
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1:09:45flyingsand You can't just hard-clip audio, though. If you don't use a compressor/limiter you would have to at least use soft-clipping with tanh or something
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1:10:12gasto5 Will you implement audio file compression?
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1:10:12gasto5 Will you implement audio file compression?
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1:10:12gasto5 Will you implement audio file compression?
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1:11:35abnercoimbre What would an audio compressor do?
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1:11:35abnercoimbre What would an audio compressor do?
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1:11:35abnercoimbre What would an audio compressor do?
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1:13:45gasto5 How much optimization would the mixer require?
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1:13:45gasto5 How much optimization would the mixer require?
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1:13:45gasto5 How much optimization would the mixer require?
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1:14:21javajax What is the difference between a limiter and a compressor?
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1:14:21javajax What is the difference between a limiter and a compressor?
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1:14:21javajax What is the difference between a limiter and a compressor?
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