[FFmpeg-user] Generating Multichannel Sine Wave Audio

[Matthias, Thomas]

I see that there is a sine wave filter when using ‘-f lavfi –i “sine=frequency=1000:duration=60”, which is great!  However, what is the easiest/best way to get this into a multichannel format, say 5.1 or even 16 channels?  Ideally it would be nice to specify multiple frequencies for each channel, but if I want say 16 channels of the exact same sinewave in each, how would I do this?  Is there a way to “copy” the first channel into the remaining 15?  Do I need to specify an input for each channel and then use –map correctly?

I’ve tried a few different things, but no success so far.