arecord: main:788: audio open error: No such file or directory

sorry my English is not good, I get this error
Hardware is Raspy 4 and MatrixVoice and I have it set up according to this guide, at the point where I should test
“amixer set PCM 100% && arecord recording.wav -f S16_LE -r 16000 -d 5 && aplay recording.wav”

I get this message

pi@raspberrypi:~ $ sudo amixer set PCM 100% && arecord recording.wav -f S16_LE -r 16000 -d 5 && aplay recording.wav
Simple mixer control ‘PCM’,0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback -10239 - 400
Mono: Playback 400 [100%] [4.00dB] [on]
arecord: main:788: audio open error: No such file or directory