PreferenceSpecifiers Title Codecs Type PSGroupSpecifier DefaultValue Key speex_16k_preference Title Speex 16kHz Type PSToggleSwitchSpecifier DefaultValue Key speex_8k_preference Title Speex 8kHz Type PSToggleSwitchSpecifier DefaultValue Key opus_preference Title Opus 48kHz Type PSToggleSwitchSpecifier DefaultValue Key silk_24k_preference Title Silk 24kHz Type PSToggleSwitchSpecifier DefaultValue Key silk_16k_preference Title Silk 16kHz Type PSToggleSwitchSpecifier DefaultValue Key aaceld_16k_preference Title AAC-ELD 16kHz Type PSToggleSwitchSpecifier DefaultValue Key aaceld_22k_preference Title AAC-ELD 22kHz Type PSToggleSwitchSpecifier DefaultValue Key aaceld_32k_preference Title AAC-ELD 32kHz Type PSToggleSwitchSpecifier DefaultValue Key aaceld_44k_preference Title AAC-ELD 44kHz Type PSToggleSwitchSpecifier New item DefaultValue Key aaceld_48k_preference Title AAC-ELD 48kHz Type PSToggleSwitchSpecifier DefaultValue Key amr_preference Title AMR Type PSToggleSwitchSpecifier Title BV16 Key bv16_preference Type PSToggleSwitchSpecifier DefaultValue NO DefaultValue Key g722_preference Title G.722 Type PSToggleSwitchSpecifier DefaultValue Key g729_preference Title G.729 Type PSToggleSwitchSpecifier DefaultValue Key gsm_preference Title GSM Type PSToggleSwitchSpecifier DefaultValue Key ilbc_preference Title iLBC Type PSToggleSwitchSpecifier DefaultValue Key isac_preference Title iSAC Type PSToggleSwitchSpecifier DefaultValue Key pcmu_preference Title PCMU Type PSToggleSwitchSpecifier DefaultValue Key pcma_preference Title PCMA Type PSToggleSwitchSpecifier Key codec2_preference Title codec2 Type PSToggleSwitchSpecifier DefaultValue Key audio_advanced_group Title Advanced Type PSGroupSpecifier Key playback_gain_preference Title Playback gain Type PSTextFieldSpecifier KeyboardType NumbersAndPunctuation DefaultValue 0 IASKTextAlignment IASKUITextAlignmentRight Key microphone_gain_preference Title Microphone gain Type PSTextFieldSpecifier KeyboardType NumbersAndPunctuation DefaultValue 0 IASKTextAlignment IASKUITextAlignmentRight DefaultValue 36 Key audio_codec_bitrate_limit_preference Title Codec bitrate limit Titles 10 kbits/s 15 kbits/s 20 kbits/s 36 kbits/s 64 kbits/s 128 kbits/s Type PSMultiValueSpecifier Values 10 15 20 36 64 128 DefaultValue Key voiceproc_preference Title Enable Voice Processing Type PSToggleSwitchSpecifier DefaultValue Key eq_active Title Enable Bass Boost Type PSToggleSwitchSpecifier