speech-tools 1:2.5.0-12 (riscv64 binary) in ubuntu lunar

 This package contains the various highly useful utility programs that use and
 accompany the Edinburgh Speech Tools Library. Audio software and some basic
 signal processing software is included in this package.
 .
 The following programs are available:
 na_play: generic playback program for use with net_audio and CSTR ao.
 ch_wave: Waveform file conversion program.
 ch_lab: label file conversion program.
 ch_track: Track file conversion program.
 wagon: a CART tree build and test program
 .
 See /usr/share/doc/speech-tools/README for detail list of programs available.