Shairport-sync on Raspberry Pi 3 report

[tvoretz]

Hi!
Not an issue, just want to report that my Shairport-sync installation on Raspberry Pi 3 works well. You mentioned on your main page that built-in audio DAC has poor quality. But it seems like RPi team developed a new audio driver (https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=136445&start=100), so now sound is really not bad from my point of view.

So what i've done:

1. Upgrade firmware:
   rpi-update
2. Place this string into /boot/config.txt:
   audio_pwm_mode=2
3. From command line execute the following to set analog jack as a main audio out:
   amixer cset numid=3 1
4. In shairport-sync.conf set:
   volume_range_db = 30
5. And there is an advice to disable wlan adapter power management on RPi (when power management is enabled, it may prevent Shairport-sync to be visible on AirPlay devices list on Apple devices). So you need to edit /etc/network/interfaces like this:

allow-hotplug wlan0
iface wlan0 inet manual
wireless-power off
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

P.S. I don't use soxr.

[mikebrady]

Thanks. Do you happen to know if the new audio driver is a full release or is it still in development?

[ChristianOrgs]

Well the power mgnt off mode works like a charm. I just play around with 'Airfoil' and three Pi's. I own 5 Pi's and one is a 3. This one is my GameStationPi and the sound is way better.

[mikebrady]

Wow – many thanks. You are absolutely right – the sound is very much improved by audio_pwm_mode=2. I'm trying it on an original Raspberry Pi Model B over WiFi and the difference is very noticeable.

I didn't need to do the amixer cset numid=3 1. As a temporary measure, I've updated the README.md to point to this issue.

[tvoretz]

Do you happen to know if the new audio driver is a full release or is it still in development?

I read whole the thread on Pi's forum and found that audio_pwm_mode=2 is still not used by default. So I think it's in development, but works!

By the way, thanks for Shairport-sync. I'm using it now every day 👍

[mikebrady]

Super, thanks.

[sebastianwr]

Thanks @tvoretz for reporting! I performed all the described steps, except for an rpi-update. This fixed the stuttering audio for me. Thank you @mikebrady for this excellent project!

[mikebrady]

Thanks for this contribution. Closing the issue. Please open a new one if necessary.