The USB I/F of IC-7410 can also be used for audio recording and playback.
A GUI program Audacity is used here, but if your prefer to use CLIs, do as in the following way.
% arecord -l **** List of CAPTURE Hardware Devices **** card 1: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 % aplay -l **** List of PLAYBACK Hardware Devices **** card 1: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 % arecord -d 5 -r 48000 -f S16_LE -D hw:1,0 > test.wav Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono % aplay -D hw:1,0 test.wav Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
You can check the maximum sampling frequency by giving some higher values.
% arecord -d 5 -r 96000 -f S16_LE -D hw:1,0 > test.wav
Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 96000 Hz, Mono
Warning: rate is not accurate (requested = 96000Hz, got = 48000Hz)
please, try the plug plugin