slow down the speed of sound proportionally

[aldosha]

Hi a all!
I learned how to reduce the video speed. But the video sound doesn't slow down. Why? How do it with Avidemux - what slow down the speed of sound proportionally

[eumagga0x2a]

You will need to edit the audio track in an external wave editor like Audacity and import it in Avidemux as external audio track.

[tazztone]

would be nice if audio would be automatically slowed down when "change fps" is used. as it does with most media players when u reduce speed to 0.5x.
hope it's ok to post here. love avidemux

[szlldm]

you can select Custom Frame rate change in Audio Filters, after "change fps" filter is activated