Alsa problem

GNU Radio
1

Hi together,

i am using grc 3.7.6.1. The system is odroid with ubuntu 14. I tested
the alsa system with aplay and the sound works.

When i start my project on odroid i get the following error message. On
my desktop pc with grc 3.7.2.1 / ubuntu 14 the grc alsa works.

INFO: Audio sink arch: alsa
ERROR: [default]: snd_pcm_hw_params failed: Invalid argument
Traceback (most recent call last):
File “/home/odroid/gr-rds-master_rds2/apps/rds_rx.py”, line 421, in

tb.Start(True)
File
“/usr/local/lib/python2.7/dist-packages/grc_gnuradio/wxgui/top_block_gui.py”,
line 73, in Start
self.start()
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/gr/top_block.py”, line
106, in start
top_block_start_unlocked(self._impl, max_noutput_items)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/gr/runtime_swig.py”,
line 4742, in top_block_start_unlocked
return _runtime_swig.top_block_start_unlocked(*args, **kwargs)
RuntimeError: check topology failed on audio_alsa_sink(54) using
ninputs=2, noutputs=0

Andy ideas ? Thanks in advance.

cheers,
Andy

2

On Mon, May 25, 2015 at 6:15 AM, Andreas L.
[email protected]
wrote:

ERROR: [default]: snd_pcm_hw_params failed: Invalid argument
top_block_start_unlocked(self._impl, max_noutput_items)
cheers,
Andy

It would be helpful here to see the flowgraph you’re working on. The
error
is related to the blocks and how you connected them up. The audio sink,
in
this case, is having a problem with the input connections you’re giving
it.

Tom