Manfred

wxrwxrwx

areceord is execuatble by the user (root) and the group(root) and others (everyone else)

arecord -l

will list recording devices

mmm-voice says config

microphone	REQUIRED	Id of microphone shown in the installer.

shown in the installer <---- thats the key

pi@raspberrypi:~ $ ls /usr/bin/arecord -laF
lrwxrwxrwx 1 root root 5 16. Apr 2021 /usr/bin/arecord -> aplay*

Is it that way that I have to set the microphone in MM separately so that the Module MMM-voice will recognize the micophone which is on card 1 device 0.

u forgot to do

 which arecord

and use it’s output, the full path to arecord

it’s the write of out.wav that is causing the problem

cd ~

to go to the users home folder

everything (mm related) should be installed there

generally, never use sudo unless u know WHY u need to do that

pi@raspberrypi:/ $ arecord --format=S16_LE --duration=5 --rate=16000 --file-type=wav out.wav
Aufnahme: WAVE ‘out.wav’ : Signed 16 bit Little Endian, Rate: 16000 Hz, mono
out.wav: Keine Berechtigung

This ist the arecord without sudo

pi@raspberrypi:/ $ sudo arecord --format=S16_LE --duration=5 --rate=16000 --file-type=wav out.wav
Aufnahme: WAVE ‘out.wav’ : Signed 16 bit Little Endian, Rate: 16000 Hz, mono

and here the task with sudo.

ls arecord or find arecord – file or folder not found.

I assume that arecord is part of aplay probably of the alsa family.
But why do tasks of the same family ask for different rights.

Manfred

which arecord

will tell you where it is

ls ??? -laF
will give you the current info
??? is the output of which

permissions are 3 settings read/write/execute
for each of 3 user relationships

user - user is the owner
group - user accessing is my the owner, but in the group
other - user accessing is not in the above

3 bits
4 - read
2 - write
1 - execute

7 is all 3
6 is read/write
2 is write only

777 is all permissions for all users ( bad)

each user has their own group as well.

u will need to use sudo to change the permissions or user/group assignments

see the help for each command, for example

chmod --help