When saving a nice sounding wav file to ulaw format 8000k mono it sounds awful in the welcome and message prompts.Is there a better way to save prompts to ipcc 5.02 to make them sound clearer?
I've tried using wavepad and audacity but no improvement. I've tried stereo and high freqs but they dont work and Cisco quotes 8000 mono as the required format.
Transcoding a prompt from CD Quality to CCITT uLaw is always going to sound horrible. Your best bet is to always record in the codec you are using.
Many recording programs cannot really do CCITT by default (Audacity is one) but they can record in PCM. Changing from PCM to CCITT hasn't ever affected the sound quality in my experience if the bit rate is the same.