I have a problem with Asterisk: the playback in the functions Playback and Background gives a very crackling sound. I’ve tried a few file formats but they all result in the same. I’ve even tried MP3, which i also use for MOH. The weird thing is, MusicOnHold and stuff sounds perfect, i have no problem at all with these functions.
I have a Asterisk 220.127.116.11-installation on Ubuntu 7 (Linux kernel 18.104.22.168 with CONFIG_HZ set at 1000). I only use SIP channels and have no Digium-hardware installed. Conversations (phone-to-phone over SIP) sound perfect too, just like MOH. I have installed ztdummy, but i am not sure if asterisk actually uses this.
Does anyone know what the problem can be and how I can fix this?