[pulseaudio-discuss] Seeking advice on use of padsp

[Geoff Browne]

If I type the following at the terminal I get the expected tone..

/usr/bin/padsp  /usr/bin/tones sine 100 900

...but if I try this from within some C code on a R-Pi Zero...

system("/usr/bin/padsp  /usr/bin/tones sine 100 900");

I get...
[tones] Connection refused : /dev/dsp

and with -d on...

utils/padsp.c: dsp_open()
utils/padsp.c: fd_info_new()
utils/padsp.c: pa_context_connect() failed: Connection refused
utils/padsp.c: freeing fd info (fd=4)
utils/padsp.c: Draining.
utils/padsp.c: dsp_open()
utils/padsp.c: fd_info_new()
utils/padsp.c: pa_context_connect() failed: Connection refused
utils/padsp.c: freeing fd info (fd=4)
utils/padsp.c: Draining.
[tones] Connection refused : /dev/dsp

Can anyone please put me right ?

Thanks,
GB.