Solved: How can I start two instances of librespot? (second instance crashes)

[fschuele]

Hi.
I've compiled librespot as follows on a raspberry pi running raspberryPI OS
cargo build --no-default-features --features "alsa-backend with-dns-sd" --release
A Hifiberry AMP2 is connected to the raspberry and I set up dual mono in the asound.conf as described here:
https://www.hifiberry.com/docs/software/dual-mono-setup/
I can run one instance of librespotify on either the default device (card/output) or on the other by specifying --device=card2 or leaving this option out.
But when I start one instance (without --device) and then try to start another instance with --device specified, I get the following error:

[2022-08-20T07:22:20Z WARN  librespot] Could not initialise discovery: Service unavailable { DNS-SD Error: NameConflict }.
[2022-08-20T07:22:20Z ERROR librespot] Discovery is unavailable and no credentials provided. Authentication is not possible.

As I understand, using the system's avahi should make it possible to run two instances (see:
On the other hand, if with-dns-sd was not enabled, librespot might interfere with Avahi, Bonjour or other librespot instances if running, or even crash on some OSs.)

Do I have to configure the system avahi or something else?

Thanks!

[fschuele]

Solved.
I did not specify a different name for the second instance (-n).