Altacast (formerly known as Edcast and Oddcast) is a free and open-source audio encoder that can be used to create Internet streams of varying types.

It will run in conjunction with various media players compatible with Winamp plugins, such as AIMP, JetAudio, KMPlayer, MediaMonkey, MusicBee and foobar2000, as well as a standalone encoder.

As a temporary workaround, the SHOUTcast DSP 1.9.2 plugin for Winamp-compatible media players may be used to broadcast to alternate mount points (e.g. stream ID no.

In 2007 Oddcast was used in a document from the Department of Audio Communication of Technische Universität Berlin as part of description to set up an internet radio broadcast system.

[10] A 2016 thesis for Oulu University of Applied Sciences has described the used of Altacast in the implementation of an internet radio station[2] while the for a 2018 article in the Linux Journal recommended it as a compatible source client for Microsoft Windows in setting up a freeware internet radio station using Liquidsoap, icecast and open standards.