discuss-gnuradio
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Newbe: Jerky sound with usrp_wfm_rcv.py


From: Matt Ettus
Subject: Re: [Discuss-gnuradio] Newbe: Jerky sound with usrp_wfm_rcv.py
Date: Thu, 26 Apr 2007 18:01:49 -0700
User-agent: Thunderbird 1.5.0.10 (X11/20070302)

Justin Shaw wrote:
I finally got the usrp up and running.  I am having two problems.
1. I believe that the data rate is overflowing the usb line becuase the sound from usrp_wfm_rcv.py is jerky and the text UaUaUaUaUa... is streaming to the screen (about 1-2 times per second). I am running the pre-compiled packages available through Ubuntu on a Dell inspiron 1501 1.6 GHz processor. Would compiling from scratch help? Is there a way to decimate the data before it comes across the usb?

Use the following option to usrp_wfm_rcv.py:

   -O plughw:0,0

And see if that helps. If it does, the problem was that your sound card doesn't directly support 32 ks/s, so turning on the ALSA resampler fixed it.

2. I need to unplug and plug the usrp after each use otherwise I get the error "RuntimeError: Unable to find USRP #0". Cycling the power is the only work around I have at this point. Any suggestions on how to fix this one? Full disclosure: I had to copy the files from /usr/local/share/usrp/Rev* to /usr/share/usrp to get the firmware to automatically load do I need to do anything else?

I think this is a recent Ubuntu problem.  Which version do you use?

matt




reply via email to

[Prev in Thread] Current Thread [Next in Thread]