Set options after initialization doesn't work

[ghost]

After the initialization:

out = alsaaudio.PCM(alsaaudio.PCM_PLAYBACK, device=device)

Setting an option:

out.setrate(44100)

Ends in an error:

out.setrate(44100) 
alsaaudio.ALSAAudioError: Device or resource busy [default]

Without setting an option the device can be used and everything works as expected.
Python version doesn't matter, currently using it on an raspberry pi b+ with alsa. ALSA info below.

Maybe the options should be set on the alsaaudio.PCM()?

Cheers

!!################################
!!ALSA Information Script v 0.4.64
!!################################

!!Script ran on: Sat Jan 20 13:43:10 UTC 2018


!!Linux Distribution
!!------------------

Arch Linux \r (\l) NAME="Arch Linux ARM" ID=archarm ID_LIKE=arch PRETTY_NAME="Arch Linux ARM" HOME_URL="http://archlinuxarm.org/" SUPPORT_URL="https://archlinuxarm.org/forum" BUG_REPORT_URL="https://github.com/archlinuxarm/PKGBUILDs/issues"


!!DMI Information
!!---------------

Manufacturer:
Product Name:
Product Version:
Firmware Version:
Board Vendor:
Board Name:


!!ACPI Device Status Information
!!---------------



!!Kernel Information
!!------------------

Kernel release:    4.9.77-1-ARCH
Operating System:  GNU/Linux
Architecture:      armv6l
Processor:         unknown
SMP Enabled:       Yes


!!ALSA Version
!!------------

Driver version:     k4.9.77-1-ARCH
Library version:    1.1.5
Utilities version:  1.1.5


!!Loaded ALSA modules
!!-------------------

snd_soc_justboom_dac


!!Sound Servers on this system
!!----------------------------

Jack:
      Installed - Yes (/usr/bin/jackd)
      Running - No


!!Soundcards recognised by ALSA
!!-----------------------------

 0 [sndrpijustboomd]: JustBoomDac - snd_rpi_justboom_dac
                      snd_rpi_justboom_dac


!!PCI Soundcards installed in the system
!!--------------------------------------



!!Advanced information - PCI Vendor/Device/Subsystem ID's
!!-------------------------------------------------------



!!Loaded sound module options
!!---------------------------

!!Module: snd_soc_justboom_dac
        * :


!!ALSA Device nodes
!!-----------------

crw-rw---- 1 root audio 116,  0 Jan 20 11:29 /dev/snd/controlC0
crw-rw---- 1 root audio 116, 16 Jan 20 11:29 /dev/snd/pcmC0D0p
crw-rw---- 1 root audio 116,  1 Jan 15 22:20 /dev/snd/seq
crw-rw---- 1 root audio 116, 33 Jan 15 22:20 /dev/snd/timer


/dev/snd/by-path:
total 0
drwxr-xr-x 2 root root  60 Jan 20 11:29 .
drwxr-xr-x 3 root root 140 Jan 20 11:29 ..
lrwxrwxrwx 1 root root  12 Jan 20 11:29 platform-soc:sound -> ../controlC0


!!ALSA configuration files
!!------------------------

!!System wide config file (/etc/asound.conf)

pcm_slave.test {
    pcm default
}

pcm.softvol {
    type plug
    slave test
}


pcm.!default {
    type hw
    card 0
}

ctl.!default {
    type hw
    card 0
}

!!Aplay/Arecord output
!!--------------------

APLAY

**** List of PLAYBACK Hardware Devices ****
card 0: sndrpijustboomd [snd_rpi_justboom_dac], device 0: JustBoom DAC HiFi pcm512x-hifi-0 []
  Subdevices: 0/1
  Subdevice #0: subdevice #0

ARECORD

**** List of CAPTURE Hardware Devices ****

[larsimmisch]

Closed via #63