[pulseaudio-discuss] Seeking advice on use of padsp

[gbrowne]

Fixed! Thanks again Sean.
Apologies for not copying to the list previously. G

---- Sean Greenslade wrote ----

>(Re-added the list again. Please make sure to Reply-List or Reply-All
>when responding to mailing list messages.)
>
>On Tue, Feb 15, 2022 at 10:56:55AM +0000, Geoff Browne wrote:
>> Great!  You cracked it Sean.
>> 
>> > What user is the C code running as?
>> 
>> Thank you Sean, I should have realised - it felt like something silly
>> all along.  The current C code has to be run with root privileges at
>> the moment due to the need to access various low-level control
>> registers.  I'd assumed that with root privileges it would just work
>> for any user, not realising that pulseaudio uses daemon sockets on a
>> per-user basis.
>> 
>> All I really want to do is to play short sine wave bleeps of varying
>> frequency to the bluetooth speaker that i've paired with the Pi, maybe
>> I'm making a mountain out of a molehill?
>
>There is a way to get root to use your user's pulseaudio session. You
>just need to point it to pulse's socket and connection cookie. This can
>be done via environment variables. For example, I ran the following on
>my machine:
>
># PULSE_SERVER=/run/user/1000/pulse/native PULSE_COOKIE=/home/sean/.config/pulse/cookie pactl list
>
>Of course, you will need to substitute your user's correct UID and home
>directory path. You should be able to set environment variables with the
>setenv() C function in stdlib.h.
>
>--Sean
>
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