Crossfade audio with 3.1 + audio board

[ptterb]

Hi everyone, I'm new here!

I'm looking to swap out a museum installation I made previously that uses a raspberry pi. Basically, it's a sound board activated by arcade buttons with leds. I've looked into the audio board and library, but I can't find anything about a crossfade between 2 audio files. When a user presses another button while a sound is playing, I'd like that sound to fade out while the new one fades in. Is there a built-in function to do this? Should I just loop and manually adjust the gain of the mixer channels?

Any advice would be much appreciated. I've done a bunch of arduino work, but excited to use a teensy for the first time!

Thanks!

 

[mxxx]

take a look at the "fade" object; in conjunction with a mixer (ie "AudioMixer4"), it can be used to fade in one file while fading out another.

 

[ptterb]

Thanks, that's really helpful. I'll try playing with it.

 

[PaulStoffregen]

Yup, the fade effect is designed so 2 of them, controlled at the same time with the same fade duration (one fading in, the other fading out), will match each other so the combined gain of both remains 1.0.