hi, i'm just a novice with a question. in the documentation, it says that "Speex is mainly designed for 3 different sampling rates: 8 kHz, 16 kHz, and 32 kHz. These are respectively refered to as narrowband, wideband and ultra-wideband." is this directly related to the sampling rate of the source sound. i.e. if i have 'PCM,8KHz,16bit,Mono', does it follow that i use NB for encoding/decoding? and if i have 'PCM,16KHz,16bit,Mono' do i use WB? although i obsereved that if i use only NB it doesn't matter what sampling rate the PCM is speex can still encode and decode it; and i can control the ouput quality with CBR. when will it be necessary to use WB? thanks, ronald