New Feature

• [New Features][ESPnet1][ASR] Option for GTN CTC mode #2866 by @brianyan918
• [New Features][ESPnet2][SE][README] Update to speech enhancement task #2649 by @LiChenda
• [New Features][ESPnet2][ASR][README] Lightweight Sinc Convolutions for Espnet2 #2768 by @lumaku
• [New Features][ESPnet2][Documentation] --freeze_param option #2787 by @kamo-naoyuki
• [New Features][ESPnet2][TTS][README] Add a new G2P pyopenjtalk_accent_with_pause #2843 by @kan-bayashi
• [New Features][ESPnet2][TTS][README] Add pyopenjtalk_accent g2p for ESPnet2 TTS #2781 by @ota
• [New Features][ESPnet2][TTS][README] Support X-vector based multi-speaker TTS model in ESPnet2 #2800 by @kan-bayashi

Enhancement

• [Enhancement][ESPnet1][ESPnet2] Add version info in args #2841 by @kan-bayashi
• [Enhancement][ESPnet1][ESPnet2][ASR] AMI Recipe (Short UTT checker) #2802 by @ftshijt
• [Enhancement][Installation] add default activate_python.sh #2788 by @kamo-naoyuki
• [Enhancement][Installation] modified: check_install.py #2834 by @kamo-naoyuki
• [Enhancement][Installation][Documentation][ESPnet1][ESPnet2] Change version info location #2840 by @kan-bayashi

Bugfix

• [Bugfix][ESPnet1][ASR] fix greedy decoding #2812 by @b-flo
• [Bugfix][ESPnet2][ASR] Fix the compatibility of the pretrained ASR model #2794 by @kan-bayashi
• [Bugfix][Installation] Fix #2799 #2830 by @kamo-naoyuki
• [Bugfix][Installation] Fix HTS engine installation #2825 by @kan-bayashi
• [Bugfix][Installation] fix the incorrect $PATH setting in tools/extra_path.sh #2833 by @jumon
• [Bugfix][Recipe][ESPnet1][ASR] Minor fixes in CSJ #2837 by @YosukeHiguchi
• [Bugfix][Recipe][ESPnet1][ASR] fix receipe bug for librispeech #2735 by @yuekaizhang
• [Bugfix][Recipe][ESPnet2][ASR] fix a config name #2729 by @sw005320
• [Bugfix][Recipe][ESPnet2][ASR][README] Fix dirha_wsj recipe #2747 by @kamo-naoyuki
• [Bugfix][Recipe][ESPnet2][TTS] Add missing decoding configs in LibriTTS recipe #2827 by @kan-bayashi

Recipe

• [Recipe][ESPnet1][ASR] Add LibriSpeech Conformer results for LibriCSS #2861 by @akreal
• [Recipe][ESPnet1][ASR] Update Commonvoice Recipe with Conformer Settings #2739 by @ftshijt
• [Recipe][ESPnet1][ASR] Update Russian open STT recipe for v1.01 of the dataset #2776 by @akreal
• [Recipe][ESPnet1][ASR] Update models and results of Conformer. #2765 by @pengchengguo
• [Recipe][ESPnet1][ESPnet2][ASR][README] ESPnet2 recipe for commonvoice #2793 by @hchung12
• [Recipe][ESPnet1][VC][README] VCC2020 database #2754 by @unilight
• [Recipe][ESPnet2][ASR][README] Update Dirha WSJ result #2756 by @kamo-naoyuki
• [Recipe][ESPnet2][ASR][README] espnet2 hkust recipe #2863 by @kamo-naoyuki
• [Recipe][ESPnet2][ASR][README] update the AMI result in espnet2 #2817 by @sw005320
• [Recipe][ESPnet2][ASR][README] updated the laborotv result #2750 by @sw005320
• [Recipe][ESPnet2][ASR][README] Update reverb result #2876 by @kamo-naoyuki
• [Recipe][ESPnet2][ASR] Minor fix of laborotv recipe #2877 by @hfujihara
• [Recipe][ESPnet2][TTS] Fix total number of iterations #2813 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Add libritts recipe for ESPnet2 #2807 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Add x-vector based configs for VCTK #2808 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Minor update TTS README #2818 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Update JSUT TTS results #2792 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Update JSUT results #2809 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Update JSUT results #2871 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Update LibriTTS results #2842 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Update VCTK results #2814 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] Update libritts results #2828 by @kan-bayashi
• [Recipe][ESPnet2][TTS][README] update latest CSMSC link address #2777 by @meowtech

Other

• [CI][Documentation][Installation] Change warp-ctc and warp-transducer to extra #2748 by @kamo-naoyuki
• [CI][README] Update ci setting #2848 by @kan-bayashi
• [ASR][Documentation][ESPnet2] Sinc Convolutions - add documentation for plot_sinc_filters.py #2782 by @lumaku
• [Documentation][ESPnet1] fixed some typos #2855 by @jumon
• [Documentation][Installation] Update documentation #2757 by @kamo-naoyuki
• [Installation][Refactoring] Move the dependencies coming from recipes #2740 by @kamo-naoyuki

Acknowledgements

Special thanks to @AdolfVonKleist, @LiChenda, @YosukeHiguchi, @akreal, @b-flo, @brianyan918, @ftshijt, @hchung12, @hfujihara, @jumon, @kamo-naoyuki, @kan-bayashi, @lumaku, @meowtech, @ota, @pengchengguo, @sw005320, @unilight, @yuekaizhang.