Why Using ALSA Audio Capture Block in Raspberry Pi B+, I cannot open audio device: " 'hw:1,1': No such file or directory"? I need help. (Simulink - Matlab 2015a)

Hello,

I'm trying to use the ALSA Audio Capture Block in Simulink in a Raspberry Pi Model B+, in Matlab R2015a, from the Simulink Support Package for Raspberry Pi, but when I try to select an audio device, it always says:

Cannot open audio device 'hw:1,1': No such file or directory.

I'm using a USB audio card, recognized by Matlab when I use:

h=raspberrypi; execute(h,'aplay -l', true)

And the output:

------------------------------

**** List of PLAYBACK Hardware Devices ****

card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]

Subdevices: 8/8
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
Subdevice #7: subdevice #7
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Set [C-Media USB Headphone Set], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0

--------------------------------

I have tried using all the different combinations (hw:0,0; hw:0,1...)

Does anyone know how to fix this and use the block properly?

Thank you for any help.

Regards,

Juane

[Anil Horasan]

Did you also try the default values (i.e.hw:1,0) ?

I am also confused reading aplay results, but it seems working for me.

[Juan Emilio Noriega Linares]

Yes, I tried all the values. Finally I got back to 2014b version and it worked without any problem..

[Frank Raffaeli]

I have the same issue (using 2015a), and I have tried all combinations. The USB audio device is on card 1, so I tried hw:1,0 and lots of other combinations. I'm looking into changing the default audio device on the raspberry pi, but I'm unsure of the procedure. I'm using R-PI 2B, so 2015a is the only way, I think.

[mohannad]

Frank i have the same issue could you fix it?

[Rinus Boone]

Finally I found this thread. I think that I have the same problem because ALSA Audio Capture does not work for me too. I use 2015b. I hope that MATLAB can resolve this problem.