Is there a way to call sox prior to saving a voicemail?

[aaelghat]

Hi - I use PIAF to have people call-in and make recordings using the voicemail feature.

I'd like to programmatically "clean-up" the recordings on-the-fly with sox (delete the last second to eliminate the hang-up click or pressing of the # key)

In Asterisk general settings in FreePBX, you can make a call to sox prior to call monitor recordings getting saved. Is there anything similar you can do for voicemails?

I know it's not in the FreePBX gui, but is there a workaround? Any other innovative ways to either delete the last second of the recordings, or otherwise delete the hang-up click or DTMF tones in the voicemail?

Thanks.