Ok. Seems problem is known

https://freeswitch.org/jira/browse/FS-7833

Like minority will be fixed like never :(

Regards, Igor
On Mar 12, 2019, 16:12 +0200, Igor Olhovskiy <igorolhovskiy@gmail.com>, wrote:
Hi!

Was trying to make sort of pitch shifted echo. Found mod_soundtouch.

But when making quite simple sequence of commands,

soundtouch hook_dtmf
answer
echo 1000


 getting just cracked sound. Is there any other method of achieving pitch shift sound?

Tried with Freeswitch 1.8.5 and 1.6.20

Regards, Igor