A module for manipulating voice data in Garry's Mod.

gm_8bit is designed to be a starting point for any kind of voice stream manipulation you might want to do on a Garry's Mod server (or any source engine server, with a bit of adjustment).

gm_8bit can decompress and recompress steam voice packets. It includes an SV_BroadcastVoiceData hook to allow server operators to incercept and manipulate this voice data. It makes several things possible, including:

• Relaying server voice data to external locations
• Performing voice recognition and producing transcripts
• Recording voice data in compressed or uncompressed form
• Applying transformation to user voice streams, for example pitch correction, noise suppression, or gain control.

gm_8bit currently has reference implementations for relaying voice data and applying transformations to voice streams. See the voice-relay repository for an example implementation of a server that uses gm_8bit to relay server voice communications to a discord channel.

Both windows and linux builds are available with every commit. See the actions page.

eightbit.EnableBroadcast(bool) Sets whether the module should relay voice packets to localhost:4000.

eightbit.SetBroadcastIP(string) Controls what IP the module should relay voice packets to, if broadcast is enabled.

eightbit.SetBroadcastPort(number) Controls what port the module should relay voice packets to, if broadcast is enabled.

eightbit.EnableEffect(userid, number) Sets whether to enable audio effect for a given userid. Takes an eightbit.EFF enum.

eightbit.SetGainFactor(number) Sets the gain multiplier to apply to affected userids.

eightbit.SetCrushFactor(number) Sets the bitcrush factor for the reference bitcrush implementation.

eightbit.SetDesampleRate(number) Sets the desample multiplier, used by EFF_DESAMPLE.

eightbit.EFF_NONE No audio effect.

eightbit.EFF_DESAMPLE Desamples audio, new frequency is 1/(1-1/n).

eightbit.EFF_BITCRUSH Deep fries the audio. Governed by a gain factor and a quantization factor.