Only 44100 works, giving a clear dial tone. As DSD has fixed sampling rate 8k, a resampler should do the trick. Things could be so easy :) I hate this audio stuff...
Ralph. -----Original Message----- From: Marcus D. Leech [mailto:mle...@ripnet.com] Sent: Thursday, January 15, 2015 06:41 To: Ralph A. Schmid, dk5ras; 'Tom Rondeau' Cc: 'GNURadio Discussion List' Subject: Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio On 01/15/2015 12:29 AM, Ralph A. Schmid, dk5ras wrote: >> One could just try dial_tone.py example. That will exercise the audio >> subsystem. > Output is some garbled noise, and > > python$ python dial_tone.py > INFO: Audio sink arch: alsa > aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaU > > So my audio stuff is defective, good to know :) > >> For alsa, in the device field in the audio sink, try something like >> hw:0,0 or plughw:0,0 > Seems to be alsa already...hmm...so this comes later. > > Ralph. > > It may just be that your audio-subsystem doesn't actually support the sample-rate that the graph is configuring it for. Here's the --help for dial_tone.py Usage: dial_tone.py [options] Options: -h, --help show this help message and exit -O AUDIO_OUTPUT, --audio-output=AUDIO_OUTPUT pcm output device name. E.g., hw:0,0 or /dev/dsp -r SAMPLE_RATE, --sample-rate=SAMPLE_RATE set sample rate to RATE (48000) Looks like the default is 48e3 Try other rates, like 44.1e3 or 32e3 _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
