I am trying to determine if the OpenMoko GSM voice can be modified by software. I have heard "it is possible" and "it is impossible". One of these is true. Does anyone know any details about how it is possible?
The CODEC details are here: http://www.wolfsonmicro.com/uploads/documents/en/WM8753.pdf Looking at the OpenMoko audio path, it seems that there is no way to modify GSM voice. (http://wiki.openmoko.org/wiki/Neo1973_Audio_Subsystem) * audio path Mic -> GSM o MIC2/MIC2N o Mic2 Volume o ALC Micer Mic2 o Left PGA o Mic Sidetone Mux [Left PGA] o Mono Sidetone Volume o Mono Mixer Sidetone Playback Switch o Mono Volume o Mono 2 Mux [Inverted Mono 1] * audio path GSM -> Speaker o RXP/RXN o Rx Mixer [RXP - RXN] o Line Left Mux [Rx Mix]/Line Right Mux [Rx Mix] o Left Mixer Bypass Playback Switch/Right Mixer Bypass Playback Switch o Headphone Volume
