The codec that is mostly supported (and negotiated) for my calls is G711 which has 8khz sample rate. So both channels for all calls are getting recorded in 8khz. Is it possible to ask Asterisk to record outbound channel in 16khz (i.e. in G711.1) with keeping original frequency information present (and not just resampling 8khz audio to 16khz)?
Unfortunately, I don’t have experience with Asterisk directly, another team is operating Asterisk servers. I’m working on a speech recognition solution so getting wideband audio is important for recognition quality, even getting one channel in 16khz would be great.