michael@202: ;[speex]
michael@202: ; CBR encoding quality [0..10]
michael@202: ; used only when vbr = false
michael@202: ;quality => 3
michael@202: 
michael@202: ; codec complexity [0..10]
michael@202: ; tradeoff between cpu/quality
michael@202: ;complexity => 2
michael@202: 
michael@202: ; perceptual enhancement [true / false]
michael@202: ; improves clarity of decoded speech
michael@202: ;enhancement => true
michael@202: 
michael@202: ; voice activity detection [true / false]
michael@202: ; reduces bitrate when no voice detected, used only for CBR
michael@202: ; (implicit in VBR/ABR)
michael@202: ;vad => true
michael@202: 
michael@202: ; variable bit rate [true / false]
michael@202: ; uses bit rate proportionate to voice complexity
michael@202: ;vbr => true
michael@202: 
michael@202: ; available bit rate [bps, 0 = off]
michael@202: ; encoding quality modulated to match this target bit rate
michael@202: ; not recommended with dtx or pp_vad - may cause bandwidth spikes
michael@202: ;abr => 0
michael@202: 
michael@202: ; VBR encoding quality [0-10]
michael@202: ; floating-point values allowed
michael@202: ;vbr_quality => 4
michael@202: 
michael@202: ; discontinuous transmission [true / false]
michael@202: ; stops transmitting completely when silence is detected
michael@202: ; pp_vad is far more effective but more CPU intensive
michael@202: ;dtx => false
michael@202: 
michael@202: ; preprocessor configuration
michael@202: ; these options only affect Speex v1.1.8 or newer
michael@202: 
michael@202: ; enable preprocessor [true / false]
michael@202: ; allows dsp functionality below but incurs CPU overhead
michael@202: ;preprocess => false
michael@202: 
michael@202: ; preproc voice activity detection [true / false]
michael@202: ; more advanced equivalent of DTX, based on voice frequencies
michael@202: ;pp_vad => false
michael@202: 
michael@202: ; preproc automatic gain control [true / false]
michael@202: ;pp_agc => false
michael@202: ;pp_agc_level => 8000
michael@202: 
michael@202: ; preproc denoiser [true / false]
michael@202: ;pp_denoise => false
michael@202: 
michael@202: ; preproc dereverb [true / false]
michael@202: ;pp_dereverb => false
michael@202: ;pp_dereverb_decay => 0.4
michael@202: ;pp_dereverb_level => 0.3
michael@202: 
michael@202: 
michael@202: ;[plc]
michael@202: ; for all codecs which do not support native PLC
michael@202: ; this determines whether to perform generic PLC
michael@202: ; there is a minor performance penalty for this
michael@202: ;genericplc => true