asterisk users - Jul 2016 - play sound without stop it when dtmf is pressed

Hello,

I would like to known if there is a way to use background without stopping
playing the sound file until it's end and capture dtmf.

i try :

background(soundfile)
waitexten(10)

but background exit immediatly when any dtmf is press and continue to
waitexten
I want the full sound file play and capture dtmf.

I can't use moh for this case (waitexten option with m) as i will have many
many voice to handle and need use langage of the channel.

playback discard any info about dtmf. playback + dtmf recording will be
perfect.

Thanks for help

Regards,
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