# len var (sound)

Source: https://ref.dm-lang.org/sound/var/len
Added in BYOND 513.

This value is set by the `SoundQuery` proc and represents the length, in seconds, of a sound playing on the client. Frequency is taken into into consideration, so a higher frequency means the sound takes a shorter time to play and therefore has a shorter length.

Other uses for this var may be considered in the future.

### See also
- [vars (sound)](https://ref.dm-lang.org/sound/var/index.md)
- [SoundQuery proc (client)](https://ref.dm-lang.org/client/proc/SoundQuery.md)